Filing under Rule 425 under the U.S. Securities Act of 1933 Filing by: Nippon Mining Holdings, Inc. Subject Companies: Nippon Oil Corporation and Nippon Mining Holdings, Inc. Commission File Number: 132-02665 Dated November 2, 2009

Filing under Rule 425 under the U.S. Securities Act of 1933 Filing by: Nippon Mining Holdings, Inc. Subject Companies: Nippon Oil Corporation and Nippon Mining Holdings, Inc. Commission File Number: 132-02665 Dated November 2, 2009 [GRAPHIC OMITTED] [GRAPHIC OMITTED] Execution of a Business Integration Agreement --------------------------------------------- and the Preparation of a Share Transfer Plan -------------------------------------------- Nippon Oil Corporation Nippon Mining Holdings, Inc. October 30, 2009

I. Outline of the Business Integration Nippon Oil Corporation - 1 - Nippon Mining Holdings, Inc. slide01

Objectives and Basic Concept of the Business Integration -------------------------------------------------------- Objectives of the Business Integration Objectives of [] Anticipate future structural changes in business the Business environment Integration [] Further strengthen the management base [] Progress under a new management philosophy Carry out the mission to provide a stable and efficient supply of energy, resources and materials [] Become one of the world's leading "integrated energy, Basic resources and materials groups," operating in the areas of Concept petroleum refining and marketing, oil and natural gas exploration and production, and metals [] Allocate management resources to the operations with highest profitability under the concept of "Best Practices" [] Undertake comprehensive restructuring of the petroleum refining and marketing sector at an early stage, which will become possible for the first time through the business integration Nippon Oil Corporation - 2 - Nippon Mining Holdings, Inc. slide02

Exchange Ratio ------------------------------------------------------------------------------- -------------------- The Exchange Ratio -------------------- ----------------------------------------------------------------- Nippon Oil Nippon Mining ----------------------------------------------------------------- 1.07 1.00 Note 1 1.07 shares of common stock of the Holding Company will be allocated and delivered per share of common stock of Nippon Oil, and 1.00 shares of the common stock of the Holding Company will be allocated and delivered per share of common stock of Nippon Mining. If fractional shares constituting less than one unit of shares of the Holding Company's common stock would be delivered to shareholders of Nippon Oil, the Holding Company will pay cash to such shareholders based on such fractional shares pursuant to the provision of Article 234 of the Companies Act and other relevant laws and regulations. However, the above-mentioned exchange ratio may be altered upon mutual agreement by the Companies if any material change occurs in the circumstances regarding the operation, assets or debt situation of Nippon Oil or Nippon Mining. In addition, 100 shares of the Holding Company stock will constitute one unit. Note 2 Number of Shares to be Issued by the Holding Company (scheduled): Common stock 2,495,485,929 shares Nippon Oil Corporation - 3 - Nippon Mining Holdings, Inc. slide03

Schedule of the Business Integration -------------------------------------------------------------------------------- October 30, 2009 Meetings of the board of directors to approve the business integration agreement and the preparation of the share transfer plan October 31, 2009 Public notice of record date for the extraordinary meetings (scheduled) of shareholders November 15, 2009 Record date for the extraordinary meetings of shareholders (scheduled) January 27, 2010 Extraordinary meetings of shareholders regarding the (scheduled) approval of the share transfer plan March 29, 2010 Delisting of shares from stock exchanges (scheduled) April 1, 2010 Incorporation and registration of the Holding Company (scheduled) (Effective date of the Share Transfer) Listing of shares of the Holding Company (Tokyo Stock Exchange, Osaka Securities Exchange and Nagoya Stock Exchange) July 1, 2010 Incorporation of core business companies (scheduled) If the necessity arises in the course of business integration or other circumstances, changes to the schedule may be made upon consultation between the Companies. Nippon Oil Corporation - 4 - Nippon Mining Holdings, Inc. slide04

Trade Name of the Integrated Group -------------------------------------------------------------------------------- Integrated Group JX Group Holding Company JX Holdings, Inc. Petroleum Refining and Marketing JX Nippon Oil & Energy Corporation Business Company Oil and Natural Gas Exploration and JX Nippon Oil & Gas Exploration Corporation Production Business Company Metals Business JX Nippon Mining & Metals Corporation Company (Note 1) "JX" is a name which represents the basic philosophy of the Integrated Group. "J" represents a Japanese and world leading "integrated energy, resources and materials business group," and "X" represents challenges of the unknown, growth and development for the future, and creativity and innovation, among others. (Note 2) Logo and trade mark of the Holding Company and the core business companies will be announced upon determination. Nippon Oil Corporation - 5 - Nippon Mining Holdings, Inc. slide05

Management Structure -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Post Name Current Post -------------------------------------------------------------------------------- Representative Shinji Nishio Representative Director and Director and President, President and Chairman of the Board Executive Officer, Nippon Oil Corporation -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Representative Director Mitsunori Takahagi President and Chief Executive and President, Officer, Nippon Mining President and Executive Officer Holdings, Inc. -------------------------------------------------------------------------------- (Note) 4 of the 16 directors are outside directors. 4 of the 6 corporate auditors are outside corporate auditors. -------------------------------------------------------------------------------- Post Name Current Post -------------------------------------------------------------------------------- Representative Director Yasushi Kimura Director, Senior Vice and President, JX Nippon President, Executive Director Oil & Energy Corporation of the Energy Solution Division, Nippon Oil Corporation -------------------------------------------------------------------------------- Representative Director Makoto Koseki Representative Director and and President, JX Nippon President, Nippon Oil Oil & Gas Exploration Exploration Limited Corporation -------------------------------------------------------------------------------- Representative Director Masanori Okada President and Chief Executive and President, JX Nippon Officer, Nippon Mining Mining & Metals Corporation & Metals Co., Ltd. -------------------------------------------------------------------------------- Nippon Oil Corporation - 6 - Nippon Mining Holdings, Inc. slide06

Outline of the Holding Company -------------------------------------------------------------------------------- Trade Name of the JX Holdings, Inc. Holding Company Location of 6-3, Otemachi 2-chome, Chiyoda-ku, Tokyo Head Office Paid-in Capital (Y)100 billion Date of Delisting March 29, 2010 of Shares of Both Companies (scheduled) Date of Share April 1, 2010 Transfer (scheduled) Date of Listing April 1, 2010 of the Holding Company (scheduled) Exchange Ratio Nippon Oil Shares 1. 07 : Nippon Mining Shares: 1.00 Nippon Oil Corporation - 7 - Nippon Mining Holdings, Inc. slide07

Method of the Business Integration -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- (First Step) (Completion of the Integration) Incorporation of Integrate, Restructure and Reorganize the Holding Company all businesses into three core April 1, 2010 (Scheduled) business companies July 1, 2010 (Scheduled) ------------------------------------------------------------------------------------------------------------ Holding Company Holding Company ------------------------------------------------------------------------------------------------------------ JX Holdings JX Holdings Nippon Petroleum Japan Energy Petroleum Refining Oil and Natural Gas Metals Business Common Refining Co., Ltd. Corporation and Marketing Exploration and Nippon Mining and function Business Production Nippon Mining & companies Nippon Oil Japan Energy Business Metals will merge ----------- Exploration Development Nippon Oil, Nippon Independent Limited Co., Ltd. Petroleum Refining Nippon Oil business and Japan Energy Exploration and companies Nippon Mining & will merge Japan Energy ---------- Metals Co., Ltd. Development will merge ----------------------------------------------------------------------------------------------- Nippon Oil Corporation - 8 - Nippon Mining Holdings, Inc. slide08

Basic Roles of the Holding Company and the Core Business Companies ------------------------------------------------------------------------------- Maximization of the corporate value ---------------------------------------------------------------- Holding Company Strategic distribution of management resources ----------------------------- --------------------------- Business development Pursuit of synergies and innovation ----------------------------- --------------------------- Core Business Petroleum Refining Oil and Natural Gas Companies and Marketing Business Exploration and Metals Business Production Business Nippon Oil Corporation - 9 - Nippon Mining Holdings, Inc. slide09

II. Business Strategy of the Integrated Group -------------------------------------------------------------------------------- Nippon Oil Corporation - 10 - Nippon Mining Holdings, Inc. slide10

Basic Strategy and Business Strategy of the Integrated Group -------------------------------------------------------------------------------- ---------------------- Basic Strategy ---------------------- [] Aim to become one of the world's leading integrated energy, resources and materials groups. [] Maximize corporate value by allocating management resources to operations with highest profitability. [] Promote projects that assist in the creation of a better global environment and innovation of new technologies, and contribute to the development of a sustainable economy and society. Nippon Oil Corporation - 11 - Nippon Mining Holdings, Inc. slide11

Business Strategies of the Core Businesses -------------------------------------------------------------------------------- Petroleum Refining & Marketing Business JX Nippon Oil & Energy Corporation Undertake fundamental structural reforms that anticipate future changes in business Environment [] Decrease oil refining capacity, increase efficiency of and value-added to refining facilities [] Maximization of synergies, significant improvement of cost competitiveness [] Global expansion of operations Strive to be an integrated energy company that responds to our customers' needs [] Improve customer satisfaction and strengthen brand value [] Engage in new energy businesses such as fuel cells and photovoltaic power generation Oil and Natural Gas E&P Business JX Nippon Oil & Gas Exploration Aim for sustainable growth while responding flexibly to changes in the business environment [] Actively making investments while carrying out thorough risk management. Strengthen the operating base on a global scale [] Accumulate technology and strengthen relationships with governments of oil-producing countries and business partners Metals Business JX Nippon Mining & Metals Corporation Aim to establish a global integrated production system centered on the copper business [] Actively develop copper mines, improve the equity base entitlement volume of copper and investment returns [] Develop innovative copper-smelting technologies Aim to have one of the top market shares in areas in which significant growth is expected [] Introduce high-functionality materials to the electronic materials business [] Promote the recycling and environmental services business [] Encourage growth of titanium and polysilicon manufacturing businesses Nippon Oil Corporation - 12 - Nippon Mining Holdings, Inc. slide12

Management Goal of the Integrated Group -------------------------------------------------------------------------------- [] After the execution of the business integration agreement, consider the future business environment, competitiveness of the integrated group, strategies and profitability of each business operation and the most appropriate distribution of management resources in the future [] Financial goal is to achieve at least 10% return on equity (ROE) and a debt to equity ratio (D/E Ratio) of not more than 1.0 at an early stage [GRAPHIC OMITTED] -------------------------------------------------------------------------------- Scheduled to announce the Integrated Group's "Long-Term Around April 2010 Vision" and "Mid-Term Management Plan" for the fiscal years from 2010 through 2012 -------------------------------------------------------------------------------- Nippon Oil Corporation - 13 - Nippon Mining Holdings, Inc. slide13

Reduction of Petroleum Refining Capacity -------------------------------------------------------------------------------- ----------------------------------------- Reduction of Petroleum Refining Capacity ----------------------------------------- ----------------------------------------------------------------------- By March 31, 2011 Reduce capacity by 400,000 barrels per day * ----------------------------------------------------------------------- ----------------------------------------------------------------------- By March 31, 2015, Capacity is scheduled to be further reduced by at the latest 200,000 barrels per day * ----------------------------------------------------------------------- * December 4, 2008 (the date of basic agreement) is the benchmark date [GRAPHIC OMITTED] The specific breakdown and method will be announced upon determination Nippon Oil Corporation - 14 - Nippon Mining Holdings, Inc. slide14

Synergies from the Business Integration -------------------------------------------------------------------------------- Synergies from the Business Integration ------------------------------- By the end of March 2013 (Y) 60 billion or more per year --------------------------------------------------------------------------- [GRAPHIC OMITTED] --------------------------------------------------------------------------- By the end of March 2015 (Y) 100 billion or more per year (an additional (Y) 40 billion per year) --------------------------------------------------------------------------- Nippon Oil Corporation - 15 - Nippon Mining Holdings, Inc. slide15

III. Exhibits -------------------------------------------------------------------------------- Nippon Oil Corporation - 16 - Nippon Mining Holdings, Inc. slide16

Profile of the Holding Company Newly-Established Through the Share Transfer -------------------------------------------------------------------------------- Trade Name JX Holdings Kabushiki Kaisha (JX Holdings, Inc. in English) -------------------------------------------------------------------------------- Location of Head Office 6-3, Otemachi 2-chome, Chiyoda-ku, Tokyo -------------------------------------------------------------------------------- Name and Title of Shinji Nishio, Representative Director and Representatives Chairman of the Board (currently, Representative Director and President, President and Executive Officer, Nippon Oil Corporation) Mitsunori Takahagi, Representative Director and President (currently, President and Chief Executive Officer, Nippon Mining Holdings, Inc.) -------------------------------------------------------------------------------- Principal Business (i) Business management of subsidiaries which engage in petroleum refining and marketing business, oil and natural gas exploration and production business, and metals business, and (ii) businesses ancillary to business described in (i). -------------------------------------------------------------------------------- Paid-in Capital, Capital Paid-in Capital: (Y)100 billion, Capital Reserve: Reserve (Y)25 billion -------------------------------------------------------------------------------- Fiscal Year End March 31 -------------------------------------------------------------------------------- Net Assets (consolidated) Not yet determined -------------------------------------------------------------------------------- Total Assets (consolidated) Not yet determined -------------------------------------------------------------------------------- Number of Shares Scheduled 2,495,485,929 shares to be Issued -------------------------------------------------------------------------------- Number of Shares Constituting 100 shares One Unit of Shares -------------------------------------------------------------------------------- Listed Stock Exchanges Tokyo Stock Exchange, Osaka Securities Exchange and Nagoya Stock Exchange -------------------------------------------------------------------------------- Accounting Auditor Ernst & Young ShinNihon LLC -------------------------------------------------------------------------------- Transfer Agent The Chuo Mitsui Trust and Banking Co., Ltd. -------------------------------------------------------------------------------- Overview of Accounting Accounting treatment of the Share Transfer will be conducted Treatment in Conjunction with pursuant to the "Accounting Standards for Business the Share Transfer Combinations" which were amended on December 26, 2008. -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Prospects of Impact of the The prospects of the business results after the Share Transfer on Business business integration will be announced upon Results determination. Around April 2010, the Holding Company plans to establish and announce for the Integrated Group a "Long-Term Vision" as well as a "Mid-Term Management Plan" for the Integrated Group for three years from fiscal 2010. -------------------------------------------------------------------------------- Nippon Oil Corporation - 17 - Nippon Mining Holdings, Inc. slide17

Corporate Profiles of the Companies -------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------- Trade Name Nippon Oil Corporation Nippon Mining Holdings, Inc. --------------------------------------------------------------------------------------------------------------- Date of Establishment May 10, 1888 September 27, 2002 (Commenced operation on December 26, 1905) --------------------------------------------------------------------------------------------------------------- Location of Head Office 3-12, Nishi Shimbashi 1-chome, Minato-ku, 10-1, Toranomon 2-chome, Minato-ku, Tokyo Tokyo --------------------------------------------------------------------------------------------------------------- Name and Shinji Nishio, Representative Director Mitsunori Takahagi, President and Chief Title of Representative and President Executive Officer --------------------------------------------------------------------------------------------------------------- Paid-in Capital (Y)139,400 million (Y)73,900 million (as of September 30, 2009) --------------------------------------------------------------------------------------------------------------- Total Number of Issued 1,464.51 million shares 928.46 million shares and Outstanding Shares (as of September 30, 2009) --------------------------------------------------------------------------------------------------------------- Refinement and sale of petroleum products Production and sale of petroleum products Principal Business Import and sale of gas Production and sale of non-ferrous metal Generation and sale of electricity products and processed electronic materials products --------------------------------------------------------------------------------------------------------------- Japan Trustee Services Bank, Ltd. (Trust Japan Trustee Services Bank, Ltd. (Trust Unit) (6.2%) Unit) (10.0%) -------------------------------------------------------------------------------------- The Master Trust Bank of Japan, Ltd. The Master Trust Bank of Japan, Ltd. Major Shareholders and (Trust Unit) (5.4%) (Trust Unit) (9.0%) -------------------------------------------------------------------------------------- Percentage of Mizuho Corporate Bank, Ltd. (3.2%) Japan Trustee Services Bank, Ltd. (Trust Shareholding Unit 9) (3.5%) -------------------------------------------------------------------------------------- (as of September 30, Mitsubishi Corporation (3.1%) Mizuho Corporate Bank, Ltd. (2.4%) 2009) -------------------------------------------------------------------------------------- Sumitomo Mitsui Banking Corporation (2.8%) Sumitomo Mitsui Banking Corporation (2.4%) -------------------------------------------------------------------------------------- Bank of Tokyo Mitsubishi UFJ, Ltd. (2.1%) --------------------------------------------------------------------------------------------------------------- Number of Employees 13,869 (consolidated) 10,936 (consolidated) (Breakdown: petroleum refining and marketing 9,305; oil and natural (as of September 30, (Breakdown: petroleum 4,380; metals 5,058; 2009) other 1,498) gas E&P 589; construction/other 3,975) ------------------------------------------------------------------------------------------------------------------- Main Clients Nationwide exclusive distributors and Nationwide exclusive distributors and direct sale direct sale customers customers; electric cable manufacturers ------------------------------------------------------------------------------------------------------------------- Main Financing Banks Mizuho Corporate Bank, Ltd.; Sumitomo Mizuho Corporate Bank, Ltd.; Sumitomo Mitsui Banking Mitsui Banking Corporation; Bank of Tokyo Mitsubishi UFJ, Corporation; Bank of Tokyo Mitsubishi UFJ, Ltd. Ltd. ------------------------------------------------------------------------------------------------------------------- Fiscal Year Ended March March ------------------------------------------------------------------------------------------------------------------- Capital None relationship ----------------------------------------------------------------------------------------------------- Relationship Personnel None between the relationship Relevant Parties ----------------------------------------------------------------------------------------------------- Transaction Nippon Oil Corporation and Japan Energy Corporation, a subsidiary of Nippon Mining relationship Holdings, Inc., are parties to relationship a business alliance in the areas of refining and distribution. ------------------------------------------------------------------------------------------------------------------- Nippon Oil Corporation - 18 - Nippon Mining Holdings, Inc. slide18

Business Results and Financial Conditions -------------------------------------------------------------------------------- Nippon Oil Corporation ((Y) millions, except for per shareinformation) --------------------------------------------------------------------------------------------- Nippon Oil Corporation Nippon Oil Corporation (consolidated) (non-consolidated) ----------------------------------------------------------------------------------------------- Fiscal Year End March March March March March March 2007 2008 2009 2007 2008 2009 ----------------------------------------------------------------------------------------------- Net Assets 1,331,981 1,429,266 1,016,306 786,268 827,253 746,920 ----------------------------------------------------------------------------------------------- Total Assets 4,385,533 4,594,197 3,969,730 3,071,996 3,233,615 2,868,804 ----------------------------------------------------------------------------------------------- Net Assets per share ((Y)) 829.64 896.06 627.90 537.11 565.13 511.58 ----------------------------------------------------------------------------------------------- Net Sales 6,624,256 7,523,990 7,389,234 5,826,415 6,706,382 6,658,071 ----------------------------------------------------------------------------------------------- Operating Income 159,684 263,962 (312,506) 14,445 115,325 (441,090) ----------------------------------------------------------------------------------------------- Ordinary Income 186,611 275,666 (275,448) 33,101 132,088 (147,045) ----------------------------------------------------------------------------------------------- Net Income (loss) 70,221 148,306 (251,613) 26,405 85,647 14,723 ----------------------------------------------------------------------------------------------- Net Income per share ((Y)) 48.12 101.49 (172.42) 18.06 58.53 10.07 ----------------------------------------------------------------------------------------------- Annual Dividend per 12.00 12.00 20.00 share((Y)) ----------------------------------------------------------------------------------------------- Nippon Mining Holdings, Inc. ((Y) millions, except for per share information) ------------------------------------------------------------ Nippon Mining Holdings, Inc. (consolidated) ------------------------------------------------------------ Fiscal Year End March March March 2007 2008 2009 ------------------------------------------------------------ Net Assets 701,064 765,264 659,938 ------------------------------------------------------------ Total Assets 2,056,407 2,251,208 1,866,083 ------------------------------------------------------------ Net Assets per share ((Y)) 671.56 735.22 612.44 ------------------------------------------------------------ Net Sales 3,802,447 4,339,472 4,065,059 ------------------------------------------------------------ Operating Income 132,258 103,186 (101,667) ------------------------------------------------------------ Ordinary Income 224,236 192,026 (67,433) ------------------------------------------------------------ Net Income (loss) 106,430 99,299 (40,794) ------------------------------------------------------------ Net Income per share ((Y)) 117.98 107.14 (44.02) ------------------------------------------------------------ Annual Dividend per share((Y)) ------------------------------------------------------------ Nippon Oil Corporation - 19 - Nippon Mining Holdings, Inc. slide19

Outline of Businesses -------------------------------------------------------------------------------- -------------------------------------------------------------------------------------- Trade Name Nippon Mining Holdings, Trade Name Nippon Oil Corporation Inc. -------------------------------------------------------------------------------------- Production 126,000 BD (2008 average) 15,000 BD (2008 average) ------------------------------------------------------------------------------- UpstreaReserve 669 million Bbl 32 million Bbl (as of end of Dec. 2008) (as of end of Dec. 2008) -------------------------------------------------------------------------------------- Crude Number of Crude 21 VLCC 10 VLCC Transport Carriers (as of Oct. 30, 2009) (as of Oct. 30, 2009) --------------------------------------------------------------------- Muroran izushima Refinery Refinery 180M 240 ---------------------------------------------------------------------- Sendai 145 (35,000 BD out of 240,000 BD above Refinery is research facility.) ---------------------------------------------------------------------- Refining Negishi 340Kashima Refinery (Kashima 274 Capacity of Refinery Oil Co., Ltd.) Group Refineries ---------------------------------------------------------------------- (as of Oct. 30, Osaka Refinery 115 2009) ---------------------------------------------------------------------- Refinemt Mizushima 250 and Refinery Supply ---------------------------------------------------------------------- Marifu 127 Refinery ---------------------------------------------------------------------- Oita Refinery 160 ---------------------------------------------------------------------- Total 1,317Total 514 -------------------------------------------------------------------------------------- Product Export 5.83 million KL 1.50 million KL Volume (excluding foreign Business currency Description (Fiscal year ended March (Fiscal year ended (Petroleum) 31, 2009) March 31, 2009) jet, bond) -------------------------------------------------------------------------------------- Logistic Number of Oil 46 (as of Oct. 30, 2009) 14 (as of Oct. 30, 209) Tank Centers -------------------------------------------------------------------------------------- Domestic Sales 48.87 million KL 20.82 million KL Volume of Fuel Oil (Fiscal year ended March (Fiscal year ended 31, 2009) March 31, 2009) -------------------------------------------------------------------------------------- Distribution Sales Share 23.1% 11.0% (Fiscal year ended March (Fiscal year ended 31, 2009) March 31, 2009) Number of 318 companies Exclusive 623 companies (as of end of Sep. 2009) Distribution (as of end of Sep. 2009) -------------------------------------------------------------------------------------- Number of 9,745 (as of end of Sep. 3,269 (as of end of Service Stations 2009) Sep. 2009) -------------------------------------------------------------------------------------- Paraxylene 1,600,000 t/yr (as of 1,020,000 t/yr (as Production Oct. 30, 2009) of Oct. 30, 2009) Capacity -------------------------------------------------------------------------------------- Petro- Benzene 800,000 t/yr (as of Oct. 520,000 t/yr (as of chemicals Production 30, 2009) Oct. 30, 2009) Capacity -------------------------------------------------------------------------------------- Propylene 900,000 t/yr (as of Oct. 90,000 t/yr (as of Production 30, 2009) Oct. 30, 2009) Capacity 10,000 t/yr) Escondida Copper Mine (Chile) 2.0% 2.0 Collahuasi Copper Mine (Chile) 3.6% 1.5 Los Pelambres Copper Upstream Mine (Chile) 15.0% __ 5.3 Group equity base entitlement volume of copper 8.8 % : Investment ratio of Nippon Mining & Metals Co., Ltd. (as of Dec. 31, 2008) -------------------------------------------------------------------------------------- Pan Pacific Copper (10,000 t/yr) Co., Ltd. Saganoseki Smelter & Refinery: Hitachi Works 45 Business Tamano Smelter * 16 Description LS-Nikko Copper Inc. (Metals) Midstream (Korea) Copper smelting) Onsan Smelter and 6 Refinery 5 ----------------------------------- Group Refinery Capacity 117 *: Pan Pacific Copper Investment (as of March 31, 2009) -------------------------------------------------------------------------------------- Electronic Materials Business Isohara Works (targets for semiconductors and FPDs, etc.) Downstream Shirogane Works (treated-rolled copper foil, electro-deposited copper foil, etc.) Kurami Works (Corson alloys, etc.) Recycling & Environmental Services Business HMC Works --------------------------------------------------------------------------------------------- Nippon Oil Corporation - 20 - Nippon Mining Holdings, Inc. slide20

Corporate Profiles of Major Companies (1) -------------------------------------------------------------------------------- [Nippon Petroleum Refining Co., Ltd.] --------------------------------------------------------------- Trade Name Nippon Petroleum Refining Co., Ltd. --------------------------------------------------------------- Date of Establishment October 1, 1951 --------------------------------------------------------------- Head Office 3-12, Nishi Shimbashi 1-chome, Minato-ku, Tokyo --------------------------------------------------------------- Hiroshi Ono, Representative Representative Director and President --------------------------------------------------------------- Paid-in Capital (Y)5,000 million --------------------------------------------------------------- Refinement and sale of petroleum Principal Business products, generation and sale of electricity --------------------------------------------------------------- Major Shareholder Nippon Oil Corporation (100.0%) (as of Sep. 30, 2009) --------------------------------------------------------------- Number of Employees 3,627 (as of Sep. 30, 2009) --------------------------------------------------------------- Fiscal Year End March --------------------------------------------------------------- Net Assets (Y)134,600 million (as of Mar. 31, 2009) (non-consolidated) --------------------------------------------------------------- Total Assets (Y)811,300 million (as of Mar. 31, 2009) (non-consolidated) --------------------------------------------------------------- Net Sales (Y)309,600 million (Year ended Mar. 31, 2009) (non-consolidated) --------------------------------------------------------------- Ordinary Income (Y)19,900 million (non-consolidated) (Year ended Mar. 31, 2009) --------------------------------------------------------------- [Nippon Oil Exploration Limited] ----------------------------------------------------------------- Trade Name Nippon Oil Exploration Limited ----------------------------------------------------------------- Date of Establishment June 26, 1991 ----------------------------------------------------------------- Head Office 3-12, Nishi Shimbashi 1-chome, Minato-ku, Tokyo ----------------------------------------------------------------- Representative Makoto Koseki, Representative Director and President ----------------------------------------------------------------- Paid-in Capital (Y)9,800 million ----------------------------------------------------------------- Principal Business Exploration, development and production of petroleum and natural gas ----------------------------------------------------------------- Major Shareholder Nippon Oil Corporation (100.0%) (as of Sep. 30, 2009) ----------------------------------------------------------------- Number of Employees 589 (as of Sep. 30, 2009) ----------------------------------------------------------------- Fiscal Year End December ----------------------------------------------------------------- Net Assets (Y)124,400 million (non-consolidated) (as of Dec. 31, 2008) ----------------------------------------------------------------- Total Assets (Y)313,000 million (non-consolidated) (as of Dec. 31, 2008) ----------------------------------------------------------------- Net Sales (Y)48,500 million (non-consolidated) (Year ended Dec. 31, 2008) ----------------------------------------------------------------- Ordinary Income (Y)44,800 million (non-consolidated) (Year ended Dec. 31, 2008) ---------------------------------------------------------------- Nippon Oil Corporation - 21 - Nippon Mining Holdings, Inc. slide21

Corporate Profiles of Major Companies (2) ------------------------------------------------------------ [Japan Energy Corporation] ---------------------------------------------------------- Trade Name Japan Energy Corporation ---------------------------------------------------------- Date of Establishment April 1, 2003 ---------------------------------------------------------- Head Office 10-1, Toranomon 2-chome, Minato-ku, Tokyo ---------------------------------------------------------- - Isao Matsushita, Representative President and Chief Executive Officer ---------------------------------------------------------- Paid-in Capital (Y)48,000 million ---------------------------------------------------------- Production and sale of petroleum Principal Business products ---------------------------------------------------------- Major Shareholder Nippon Mining Holdings, Inc. (100.0%) (as of Sep. 30, 2009) ---------------------------------------------------------- Number of Employees 1,403 (as of Sep. 30, 2009) ---------------------------------------------------------- Fiscal Year End March ---------------------------------------------------------- Net Assets (Y)214,600 million (non-consolidated) (as of Mar. 31, 2009) ---------------------------------------------------------- Total Assets (Y)834,500 million (non-consolidated) (as of Mar. 31, 2009) ---------------------------------------------------------- Net Sales (Y)2,900,900 million (non-consolidated) (Year ended Mar. 31, 2009) ---------------------------------------------------------- Ordinary Income ((Y)110,000 million) (non-consolidated) (Year ended Mar. 31, 2009) [Japan Energy Development Co., Ltd.] [Nippon Mining & Metals Co., Ltd.] --------------------------------------------------------- -------------------------------------------------------- Trade Name Japan Energy Development Co., Trade Name Nippon Mining & Metals Co., Ltd. Ltd. --------------------------------------------------------- -------------------------------------------------------- Date of Establishment April 2, 1982 Date of Establishment April 7, 1981 --------------------------------------------------------- -------------------------------------------------------- Head Office 9-13, Akasaka 1-chome, Head Office 10-1, Toranomon 2-chome, Minato-ku, Tokyo Minato-ku, Tokyo -------------------------------------------------------- -------------------------------------------------------- Kenji Morita, Masanori Okada, Representative President and Representative Representative President and Chief Executive Officer Director --------------------------------------------------------- -------------------------------------------------------- Paid-in Capital (Y)5,000 million Paid-in Capital (Y)24,500 million --------------------------------------------------------- -------------------------------------------------------- Exploration, production and Production and sale of sale of non-ferrous Principal Business Principal Business metal products and processed petroleum and natural gas electronic materials products --------------------------------------------------------- -------------------------------------------------------- Major Shareholder Japan Energy Corporation Major Shareholder Nippon Mining Holdings, Inc. (100.0%) (100.0%) (as of Sep. 30, 2009) (as of Sep. 30, 2009) --------------------------------------------------------- -------------------------------------------------------- Number of Employees 65 Number of Employees 1,231 (as of Sep. 30, 2009) (as of Sep. 30, 2009) --------------------------------------------------------- -------------------------------------------------------- Fiscal Year End March Fiscal Year End March --------------------------------------------------------- -------------------------------------------------------- Net Assets (Y)25,500 million Net Assets (Y)104,800 million (non-consolidated) (non-consolidated) (as of Mar. 31, 2009) (as of Mar. 31, 2009) --------------------------------------------------------- -------------------------------------------------------- Total Assets (Y)28,500 million Total Assets (Y)298,300 million (non-consolidated) (non-consolidated) (as of Mar. 31, 2009) (as of Mar. 31, 2009) --------------------------------------------------------- -------------------------------------------------------- Net Sales (Y)15,900 million Net Sales (Y)187,800 million (non-consolidated) (non-consolidated) (Year ended Mar. 31, (Year ended Mar. 31, 2009) 2009) --------------------------------------------------------- -------------------------------------------------------- Ordinary Income (Y)13,700 million Ordinary Income ((Y)5,300 million) (non-consolidated) (non-consolidated) (Year ended Mar. 31, (Year ended Mar. 31, 2009) 2009) Nippon Oil Corporation - 22 - Nippon Mining Holdings, Inc. slide22

Notice Regarding this Presentation Material Filings with the U.S. Securities and Exchange Commission Nippon Oil Corporation and Nippon Mining Holdings, Inc. may file a registration statement on Form F-4 with the U.S. Securities and Exchange Commission (the "SEC") in connection with the proposed joint share transfer. The Form F-4 (if filed) will contain a prospectus and other documents. The Form F-4 (if filed) and prospectus, as they may be amended from time to time, will contain important information about Nippon Oil Corporation and Nippon Mining Holdings, Inc., the joint share transfer and related matters including the terms and conditions of the transaction. U.S. shareholders of Nippon Oil Corporation and Nippon Mining Holdings, Inc. are urged to read the Form F-4, the prospectus and the other documents, as they may be amended from time to time, that may be filed with the SEC in connection with the joint share transfer carefully before they make any decision at the shareholders meeting with respect to the joint share transfer. The Form F-4 (if filed), the prospectus and all other documents filed with the SEC in connection with the joint share transfer will be available when filed, free of charge, on the SEC's web site at www.sec.gov. In addition, the prospectus and all other documents filed with the SEC in connection with the joint share transfer will be made available to shareholders, free of charge, by faxing a request to Nippon Oil Corporation at +81-3-3502-9860 or Nippon Mining Holdings, Inc. at +81-3-5573-5139. Cautionary Statement Regarding Forward-Looking Statements This announcement contains certain forward-looking statements. These forward-looking statements may be identified by words such as `believes', `expects', `anticipates', `projects', `intends', `should', `seeks', `estimates', future' or similar expressions or by discussion of, among other things, strategy, goals, plans or intentions. Actual results may differ materially in the future from those reflected in forward-looking statements contained in this document, due to various factors including but not limited to: (1) macroeconomic condition and general industry conditions such as the competitive environment for companies in energy, resources and materials industries; (2) regulatory and litigation matters and risks; (3) legislative developments; (4) changes in tax and other laws and the effect of changes in general economic conditions; (5) the risk that a condition to closing of the transaction may not be satisfied; (6) the risk that a regulatory approval that may be required for the transaction is not obtained or is obtained subject to conditions that are not anticipated; and (7) other risks to consummation of the transaction. Nippon Oil Corporation - 23 - Nippon Mining Holdings, Inc. slide23