POS EX

As filed with the Securities and Exchange Commission on October 25, 2021

Registration Statement No. 333-246071

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 5

TO

REGISTRATION STATEMENT

UNDER

SCHEDULE B

OF

THE SECURITIES ACT OF 1933

THE KOREA DEVELOPMENT BANK

(Name of Registrant)

THE REPUBLIC OF KOREA

(Name of Co-Registrant and Guarantor)

Names and Addresses of Authorized Representatives in the United States:

Byung Soo Kim or Ki Cheon Chang	Minsik Shin
Duly Authorized Representatives of The Korea Development Bank 320 Park Avenue, 32nd Floor New York, NY 10022	Duly Authorized Representative of The Republic of Korea 460 Park Avenue, 9th Floor New York, NY 10022

Copies to:

Jinduk Han, Esq.

Cleary Gottlieb Steen & Hamilton LLP

c/o 19F, Ferrum Tower

19, Eulji-ro 5-gil, Jung-gu

Seoul 04539, The Republic of Korea

The securities registered hereby will be offered on a delayed or continuous basis pursuant to the procedures set forth in Securities Act Release Nos. 33-6240 and 33-6424.

This Post-Effective Amendment No. 5 is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act of 1933, as amended.

EXPLANATORY NOTE

This Post-Effective Amendment No. 5 to the registrant’s Registration Statement under Schedule B (File No. 333-246071), declared effective by the Securities and Exchange Commission on July 2, 2021, is being filed solely for the purpose of filing Exhibits M-9 and M-10 to such Registration Statement pursuant to Rule 462(d) under the Securities Act. This Post-Effective Amendment No. 5 is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act of 1933, as amended. No changes or additions are being made hereby to the Prospectus which forms part of such Registration Statement.

PART II

INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 11. Estimated Expenses.*

It is estimated that our expenses in connection with the sale of the debt securities, warrants and guarantees hereunder, exclusive of compensation payable to underwriters and agents, will be as follows:

SEC Registration Fee	US$	973,500
Printing Costs		250,000
Legal Fees and Expenses		450,000
Fiscal Agent Fees and Expenses		50,000
Blue Sky Fees and Expenses		50,000
Rating Agencies’ Fees		350,000
Miscellaneous (including amounts to be paid to underwriters in lieu of reimbursement of certain expenses)		600,000
Total	US$	2,723,500

* Based on three underwritten offerings of the debt securities.

II-1

UNDERTAKINGS

The Registrants hereby undertake:

(a) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereto) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement;

(b) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and

(c) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(d) That, for purposes of determining liability under the Securities Act of 1933 to any purchaser:

each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

(e) That, for the purpose of determining any liability under the Securities Act of 1933 to any purchaser in the initial distribution of the securities:

The undersigned registrants undertake that in a primary offering of securities of the undersigned registrants pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrants will be sellers to the purchaser and will be considered to offer or sell such securities to such purchaser;

(i) Any preliminary prospectus or prospectus of the undersigned registrants relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrants or used or referred to by the undersigned registrants;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrants or their securities provided by or on behalf of the undersigned registrants; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrants to the purchaser.

II-2

CONTENTS

This Registration Statement is comprised of:

(1) Facing Sheet.

(2) Explanatory Note.

(3) Part I, consisting of the Prospectus.

(4) Part II, consisting of pages II-1 to II-9.

(5) The following Exhibits:

A-1	-	Form of Underwriting Agreement Standard Terms, incorporated herein by reference to Exhibit A to the Registration Statement of The Korea Development Bank (No. 33-38873).
B-1	-	Form of Fiscal Agency Agreement, including forms of Debt Securities, incorporated herein by reference to Exhibit B-1 to the Registration Statement of The Korea Development Bank (No. 33-44818).
B-2	-	Form of global Debt Security that bears interest at a fixed rate, incorporated herein by reference to Exhibit B-2 to the Registration Statement of The Korea Development Bank (No. 33-156305).
B-3	-	Form of Amendment No. 1 to Fiscal Agency Agreement, incorporated herein by reference to Exhibit B-3 to the Registration Statement of The Korea Development Bank (No. 333-111608).
C-1	-	Form of Warrant Agreement, including form of Warrants.*
C-2	-	Form of Guarantee Agreement, including form of Guarantees, incorporated herein by reference to Exhibit C-2 to the Registration Statement of The Korea Development Bank (No. 333-97299).
C-3	-	Form of Solicitation Indemnification Agreement, incorporated herein by reference to Exhibit C-3 to the Registration Statement of The Korea Development Bank (No. 333-97299).
D-1	-	Consent of the Chief Executive Officer & Chairman of The Korea Development Bank (included on page II-5).
D-2	-	Power of Attorney of the Chief Executive Officer & Chairman of The Korea Development Bank, incorporated herein by reference to Exhibit D-2 to the Registration Statement of The Korea Development Bank (No. 333-217914).
E-1	-	Consent of the Minister of Economy and Finance of The Republic of Korea (included on Page II-6).
E-2	-	Power of Attorney of the Minister of Economy and Finance of The Republic of Korea, incorporated herein by reference to Exhibit E-2 to the Registration Statement of The Korea Development Bank (No. 333-156305).
F	-	Consent of Nexia Samduck.**
G-1	-	Letter appointing certain persons as authorized agents of The Korea Development Bank in the United States, incorporated herein by reference to Exhibit G-1 to the Registration Statement of The Korea Development Bank (No. 333-217914).
G-2	-	Letter appointing authorized agents of The Republic of Korea in the United States (included in Exhibit E-2).
H	-	The Korea Development Bank Act.**
I	-	The Enforcement Decree of The Korea Development Bank Act.**
J	-	The Articles of Incorporation of The Korea Development Bank.**
K-1	-	Form of Prospectus Supplement relating to The Korea Development Bank’s Medium-Term Notes, Series C, Due Not Less Than Nine Months From Date of Issue (the “Series C Notes”), incorporated herein by reference to Exhibit K-1 to the Registration Statement of The Korea Development Bank (No. 333-6866).
K-2	-	Form of Supplement to the Prospectus Supplement relating to the Korea Development Bank’s Series C Notes, incorporated herein by reference to Exhibit K-2 to the Registration Statement of The Korea Development Bank (No. 333-6866).
L	-	Form of Distribution Agreement between The Korea Development Bank and the Agents named therein relating to the offer or sale from time to time of the Series C Notes, incorporated herein by reference to Exhibit L to the Registration Statement of The Korea Development Bank (No. 333-6866).

II-3

M-1	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of the Debt Securities (with or without Warrants).**
M-2	-	Opinion (including consent) of HMP LAW, 9F, Shinhan Bank Building 20, Sejong-daero 9-gil, Jung-gu, Seoul, Korea, Korean counsel to The Korea Development Bank, in respect of the legality of the Debt Securities (with or without Warrants) and the Guarantees to be issued by The Republic of Korea.**
M-3	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$500,000,000 0.500% Notes due 2023 and US$500,000,000 0.800% Notes due 2026.**
M-4	-	Opinion (including consent) of Lee & Ko, 18F Hanjin Building, 63 Namdaemun-ro, Jung-gu, Seoul 04532, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$500,000,000 0.500% Notes due 2023 and US$500,000,000 0.800% Notes due 2026.**
M-5	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.400% Notes due 2024, US$500,000,000 0.800% Notes due 2026 and US$300,000,000 1.625% Notes due 2031.**
M-6	-	Opinion (including consent) of Bae, Kim & Lee LLC, c/o Tower B, Centropolis, 26 Ujeongguk-ro, Jongno-gu, Seoul 03161, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.400% Notes due 2024, US$500,000,000 0.800% Notes due 2026 and US$300,000,000 1.625% Notes due 2031.**
M-7	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$400,000,000 0.400% Notes due 2024, US$500,000,000 1.000% Notes due 2026 and US$300,000,000 Floating Rate Notes due 2024.**
M-8	-	Opinion (including consent) of Kim & Chang, c/o 39, Sajik-ro 8-gil, Jongno-gu, Seoul 03170, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$400,000,000 0.400% Notes due 2024, US$500,000,000 1.000% Notes due 2026 and US$300,000,000 Floating Rate Notes due 2024.**
M-9		Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.750% Green Notes due 2025, US$500,000,000 1.375% Notes due 2027 and US$300,000,000 2.000% Notes due 2031.
M-10		Opinion (including consent) of Kim & Chang, c/o 39, Sajik-ro 8-gil, Jongno-gu, Seoul 03170, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.750% Green Notes due 2025, US$500,000,000 1.375% Notes due 2027 and US$300,000,000 2.000% Notes due 2031.
N-1	-	Form of the Series C Note that bears interest at a fixed rate, incorporated herein by reference to Exhibit N-1 to the Registration Statement of The Korea Development Bank (No. 333-6866).
N-2	-	Form of the Series C Note that bears interest at a floating rate, incorporated herein by reference to Exhibit N-2 to the Registration Statement of The Korea Development Bank (No. 333-6866).
O	-	Form of Calculation Agency Agreement between The Korea Development Bank and the calculation agent named therein relating to the Series C Notes that bear interest at a floating rate, incorporated herein by reference to Exhibit O to the Registration Statement of The Korea Development Bank (No. 333-6866).

* May be filed by amendment.

** Previously filed.

II-4

SIGNATURE OF THE KOREA DEVELOPMENT BANK

Pursuant to the requirements of the Securities Act of 1933, as amended, The Korea Development Bank has duly caused this Registration Statement or amendment thereto to be signed on its behalf by the undersigned, thereunto duly authorized, in Seoul, The Republic of Korea, on the 25th day of October 2021.

THE KOREA DEVELOPMENT BANK
By:	DONG GULL LEE*†
	Chief Executive Officer & Chairman
†By:	/s/    CHANG HOON LEE
	Chang Hoon Lee
	(Attorney-in-fact)

* Consent is hereby given to use of his name in connection with the information specified in this Registration Statement or amendment thereto to have been supplied by him and stated on his authority.

II-5

SIGNATURE OF THE REPUBLIC OF KOREA

Pursuant to the requirements of the Securities Act of 1933, as amended, The Republic of Korea has duly caused this Registration Statement or amendment thereto to be signed on its behalf by the undersigned, thereunto duly authorized, in The City of New York, New York, on the 25th day of October 2021.

THE REPUBLIC OF KOREA
By:	NAM-KI HONG*†
	Minister of Economy and Finance
†By:	/s/    MINSIK SHIN
	Minsik Shin
	(Attorney-in-fact)

* Consent is hereby given to use of his name in connection with the information specified in this Registration Statement or amendment thereto to have been supplied by him and stated on his authority.

II-6

SIGNATURE OF AUTHORIZED REPRESENTATIVE

OF THE KOREA DEVELOPMENT BANK

Pursuant to the Securities Act of 1933, as amended, the undersigned, a duly authorized representative in the United States of The Korea Development Bank, has signed this Registration Statement or amendment thereto in The City of New York, New York, on the 25th day of October 2021.

†By:	/s/    BYUNG SOO KIM
	Byung Soo Kim
	New York Branch
	The Korea Development Bank

II-7

SIGNATURE OF AUTHORIZED REPRESENTATIVE

OF THE KOREA DEVELOPMENT BANK

Pursuant to the Securities Act of 1933, as amended, the undersigned, a duly authorized representative in the United States of The Korea Development Bank, has signed this Registration Statement or amendment thereto in The City of New York, New York, on the 25th day of October 2021.

†By:	/s/    KI CHEON CHANG
	Ki Cheon Chang
	New York Branch
	The Korea Development Bank

II-8

SIGNATURE OF AUTHORIZED REPRESENTATIVE

OF THE REPUBLIC OF KOREA

Pursuant to the Securities Act of 1933, as amended, the undersigned, a duly authorized representative in the United States of The Republic of Korea, has signed this Registration Statement or amendment thereto in The City of New York, New York, on the 25th day of October 2021.

†By:	/s/     MINSIK SHIN
	Minsik Shin
	Financial Attaché
	Korean Consulate General in New York

II-9

EXHIBIT INDEX

A-1	-	Form of Underwriting Agreement Standard Terms, incorporated herein by reference to Exhibit A to the Registration Statement of The Korea Development Bank (No. 33-38873).
B-1	-	Form of Fiscal Agency Agreement, including forms of Debt Securities, incorporated herein by reference to Exhibit B-1 to the Registration Statement of The Korea Development Bank (No. 33-44818).
B-2	-	Form of global Debt Security that bears interest at a fixed rate, incorporated herein by reference to Exhibit B-2 to the Registration Statement of The Korea Development Bank (No. 33-156305).
B-3	-	Form of Amendment No. 1 to Fiscal Agency Agreement, incorporated herein by reference to Exhibit B-3 to the Registration Statement of The Korea Development Bank (No. 333-111608).
C-1	-	Form of Warrant Agreement, including form of Warrants.*
C-2	-	Form of Guarantee Agreement, including form of Guarantees, incorporated herein by reference to Exhibit C-2 to the Registration Statement of The Korea Development Bank (No. 333-97299).
C-3	-	Form of Solicitation Indemnification Agreement, incorporated herein by reference to Exhibit C-3 to the Registration Statement of The Korea Development Bank (No. 333-97299).
D-1	-	Consent of the Chief Executive Officer & Chairman of The Korea Development Bank (included on page II-5).
D-2	-	Power of Attorney of the Chief Executive Officer & Chairman of The Korea Development Bank, incorporated herein by reference to Exhibit D-2 to the Registration Statement of The Korea Development Bank (No. 333-217914).
E-1	-	Consent of the Minister of Economy and Finance of The Republic of Korea (included on Page II-6).
E-2	-	Power of Attorney of the Minister of Economy and Finance of The Republic of Korea, incorporated herein by reference to Exhibit E-2 to the Registration Statement of The Korea Development Bank (No. 333-156305).
F	-	Consent of Nexia Samduck.**
G-1	-	Letter appointing certain persons as authorized agents of The Korea Development Bank in the United States, incorporated herein by reference to Exhibit D-2 to the Registration Statement of The Korea Development Bank (No. 333-217914).
G-2	-	Letter appointing authorized agents of The Republic of Korea in the United States (included in Exhibit E-2).
H	-	The Korea Development Bank Act.**
I	-	The Enforcement Decree of The Korea Development Bank Act.**
J J	-	The Articles of Incorporation of The Korea Development Bank.**
K-1	-	Form of Prospectus Supplement relating to The Korea Development Bank’s Medium-Term Notes, Series C, Due Not Less Than Nine Months From Date of Issue (the “Series C Notes”), incorporated herein by reference to Exhibit K-1 to the Registration Statement of The Korea Development Bank (No. 333-6866).
K-2	-	Form of Supplement to the Prospectus Supplement relating to the Korea Development Bank’s Series C Notes, incorporated herein by reference to Exhibit K-2 to the Registration Statement of The Korea Development Bank (No. 333-6866).
L	-	Form of Distribution Agreement between The Korea Development Bank and the Agents named therein relating to the offer or sale from time to time of the Series C Notes, incorporated herein by reference to Exhibit L to the Registration Statement of The Korea Development Bank (No. 333-6866).
M-1	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of the Debt Securities (with or without Warrants).**
M-2	-	Opinion (including consent) of HMP LAW, 9F, Shinhan Bank Building 20, Sejong-daero 9-gil, Jung-gu, Seoul, Korea, Korean counsel to The Korea Development Bank, in respect of the legality of the Debt Securities (with or without Warrants) and the Guarantees to be issued by The Republic of Korea.**

M-3	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$500,000,000 0.500% Notes due 2023 and US$500,000,000 0.800% Notes due 2026.**
M-4	-	Opinion (including consent) of Lee & Ko, 18F Hanjin Building, 63 Namdaemun-ro, Jung-gu, Seoul 04532, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$500,000,000 0.500% Notes due 2023 and US$500,000,000 0.800% Notes due 2026.**
M-5	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.400% Notes due 2024, US$500,000,000 0.800% Notes due 2026 and US$300,000,000 1.625% Notes due 2031.**
M-6	-	Opinion (including consent) of Bae, Kim & Lee LLC, c/o Tower B, Centropolis, 26 Ujeongguk-ro, Jongno-gu, Seoul 03161, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.400% Notes due 2024, US$500,000,000 0.800% Notes due 2026 and US$300,000,000 1.625% Notes due 2031.**
M-7	-	Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$400,000,000 0.400% Notes due 2024, US$500,000,000 1.000% Notes due 2026 and US$300,000,000 Floating Rate Notes due 2024.**
M-8	-	Opinion (including consent) of Kim & Chang, c/o 39, Sajik-ro 8-gil, Jongno-gu, Seoul 03170, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$400,000,000 0.400% Notes due 2024, US$500,000,000 1.000% Notes due 2026 and US$300,000,000 Floating Rate Notes due 2024.**
M-9		Opinion (including consent) of Cleary Gottlieb Steen & Hamilton LLP, c/o 19F, Ferrum Tower, 19, Eulji-ro 5-gil, Jung-gu, Seoul 04539, The Republic of Korea, United States counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.750% Green Notes due 2025, US$500,000,000 1.375% Notes due 2027 and US$300,000,000 2.000% Notes due 2031.
M-10		Opinion (including consent) of Kim & Chang, c/o 39, Sajik-ro 8-gil, Jongno-gu, Seoul 03170, The Republic of Korea, Korean counsel to The Korea Development Bank, in respect of the legality of The Korea Development Bank’s US$700,000,000 0.750% Green Notes due 2025, US$500,000,000 1.375% Notes due 2027 and US$300,000,000 2.000% Notes due 2031.
N-1	-	Form of the Series C Note that bears interest at a fixed rate, incorporated herein by reference to Exhibit N-1 to the Registration Statement of The Korea Development Bank (No. 333-6866).
N-2	-	Form of the Series C Note that bears interest at a floating rate, incorporated herein by reference to Exhibit N-2 to the Registration Statement of The Korea Development Bank (No. 333-6866).
O	-	Form of Calculation Agency Agreement between The Korea Development Bank and the calculation agent named therein relating to the Series C Notes that bear interest at a floating rate, incorporated herein by reference to Exhibit O to the Registration Statement of The Korea Development Bank (No. 333-6866).

* May be filed by amendment.

** Previously filed.

EX-99.(M)(9)

Exhibit M-9

[Cleary Gottlieb Steen & Hamilton LLP Letterhead]

October 25, 2021

The Korea Development Bank

14, Eunhaeng-ro

Yeongdeungpo-gu

Seoul 07242

The Republic of Korea

Ladies and Gentlemen:

We have acted as special United States counsel to The Korea Development Bank, a statutory juridical entity established in the Republic of Korea under The Korea Development Bank Act of 1953, as amended (the “Bank”), in connection with the Bank’s offering pursuant to a registration statement under Schedule B (No. 333-246071) of US$700,000,000 aggregate principal amount of its 0.750% green notes due 2025 (the “2025 Notes”), US$500,000,000 aggregate principal amount of its 1.375% notes due 2027 (the “2027 Notes”) and US$300,000,000 aggregate principal amount of its 2.000% notes due 2031 (the “2031 Notes” and, together with the 2025 Notes and the 2027 Notes, the “Notes”) issued under a fiscal agency agreement dated as of February 15, 1991 as amended by Amendment No. 1 thereto dated as of June 25, 2004 (the “Fiscal Agency Agreement”) between the Bank and The Bank of New York Mellon, as fiscal agent (the “Fiscal Agent”). Such registration statement, as amended when it became effective, is herein called the “Registration Statement;” the related prospectus dated July 2, 2021, as filed with the Securities and Exchange Commission (the “Commission”) pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Securities Act”), is herein called the “Base Prospectus;” the related prospectus supplement dated October 18, 2021, as filed with the Commission pursuant to Rule 424(b) under the Securities Act, is herein called the “Prospectus Supplement;” and the Base Prospectus and the Prospectus Supplement, together, are herein called the “Prospectus.”

In arriving at the opinion expressed below, we have reviewed the following documents:

(a) the Registration Statement;

(b) the Prospectus;

(c) specimens of the Notes; and

(d) an executed copy of the Fiscal Agency Agreement.

In addition, we have reviewed the originals or copies certified or otherwise identified to our satisfaction of all such other documents, and we have made such investigations of law, as we have deemed appropriate as a basis for the opinion expressed below.

In rendering the opinion expressed below, we have assumed the authenticity of all documents submitted to us as originals and the conformity to the originals of all documents submitted to us as copies. In addition, we have assumed and have not verified (i) the accuracy as to factual matters of each document we have reviewed and (ii) that the Notes conform to the specimens thereof that we have reviewed and have been duly authenticated in accordance with the terms of the Fiscal Agency Agreement.

Based on the foregoing, and subject to the further assumptions and qualifications set forth below, it is our opinion that the Notes are the valid, binding and enforceable obligations of the Bank, entitled to the benefit of the Fiscal Agency Agreement.

In connection with the foregoing opinion, (a) we have assumed that each of the Bank and the Fiscal Agent has satisfied those legal requirements that are applicable to it to the extent necessary to make the Fiscal Agency Agreement and the Notes enforceable against it (except that no such assumption is made as to the Bank regarding matters of the federal law of the United States of America or the law of the State of New York that in our experience normally would be applicable with respect to the Fiscal Agency Agreement and the Notes), (b) such opinion is subject to applicable bankruptcy, insolvency and similar laws affecting creditors’ rights generally and to general principles of equity and (c) such opinion is subject to the effect of judicial application of foreign laws or foreign governmental actions affecting creditors’ rights. In addition, we note that (i) the enforceability of the waiver of immunities by the Bank set forth in the Notes is subject to the limitations imposed by the Foreign Sovereign Immunities Act of 1976 and (ii) the designation of the U.S. federal courts sitting in The City of New York as a venue for actions or proceedings relating to the Notes is (notwithstanding the waiver in such provisions) subject to the power of such courts to transfer actions pursuant to 28 U.S.C. § 1404(a) or to dismiss such actions or proceedings on the grounds that such federal court is an inconvenient forum for such action or proceeding. We express no opinion as to the subject matter jurisdiction of any United States federal court to adjudicate any action relating to the Notes where jurisdiction based on diversity of citizenship under 28 U.S.C. §1332 does not exist.

The foregoing opinion is limited to the federal law of the United States of America and the law of the State of New York.

We hereby consent to the filing of this opinion letter as an exhibit to the Registration Statement and to the reference to us under the heading “Legal Matters” in the Prospectus. In giving such consent, we do not thereby admit that we are experts with respect to any part of the Registration Statement, including this exhibit, within the meaning of the term “expert” as used in the Securities Act, or the rules and regulations of the Commission issued thereunder. We assume no obligation to advise you, or to make any investigations, as to any legal developments or factual matters arising subsequent to the date hereof that might affect the opinion expressed herein.

Very truly yours,
CLEARY GOTTLIEB STEEN & HAMILTON LLP
By	/s/ JINDUK HAN
	Jinduk Han, a Partner

EX-99.(M)(10)

Exhibit M-10

[Kim & Chang Letterhead]

October 25, 2021

The Korea Development Bank

14, Eunhaengro

Yeongdeungpogu

Seoul, Republic of Korea

Re: US$700,000,000 0.750% green notes due 2025 (the “2025 Notes”), US$500,000,000 1.375% notes due 2027 (the “2027 Notes”) and US$300,000,000 2.000% notes due 2031 (the “2031 Notes”, together with the 2025 Notes and 2027 Notes, the “Securities”) of The Korea Development Bank

Ladies and Gentlemen:

We have acted as special Korean legal counsel for The Korea Development Bank (“KDB”), a statutory juridical entity established in the Republic of Korea (“Korea”) pursuant to The Korea Development Bank Act of 1953, as amended, in connection with the issuance of the Securities by KDB pursuant to the registration statement (file number: 333-246071) filed by KDB on August 14, 2020 with the Securities and Exchange Commission (the “SEC”) under Schedule B of the Securities Act of 1933, as amended (the “Securities Act”), as amended by Amendment No.4 filed on June 25, 2021 and as declared effective by the SEC on July 2, 2021 (New York time) (the “Registration Statement”) and the fiscal agency agreement (the “Fiscal Agency Agreement”) dated as of February 15, 1991, as amended as of June 25, 2004, between KDB and The Bank of New York as fiscal agent (the “Fiscal Agent”). The prospectus dated July 2, 2021 relating to certain debt securities to be issued by KDB pursuant to the Registration Statement, as supplemented by the final prospectus supplement dated October 18, 2021, used in connection with the offering of the Securities, is herein called the “Prospectus”.

In connection with the provision of legal opinions set forth herein, we have examined originals or copies, certified or otherwise identified to our satisfaction, of the documents, records, certificates of public officials and other instruments as we have deemed necessary or advisable.

In such examination, we have assumed the genuineness of all signatures, stamps and seals, the legal capacity of natural persons, the authenticity, accuracy and up-to-datedness of all documents submitted to us as originals and the conformity to original documents of all documents submitted to us as certified or photostatic copies. As to any facts material to the opinions set forth herein, which we did not independently establish or verify, we have relied upon statements and representations of officials and other representatives of KDB. We have also assumed, in relation to the documents, that other than by or in relation to KDB, each of the documents is within the capacity and powers of, and has been validly authorized, executed and delivered by, the relevant parties thereto and is legal, valid, binding and enforceable in accordance with its respective terms under the laws of the relevant jurisdiction by which it is expressed to be governed, and there has been no breach of any of the terms thereof. We have further assumed that where a document has been examined by us in draft or specimen form, it will be, or has been, executed in the form of that draft or specimen.

Based upon the foregoing and subject to further qualifications set forth below, we are of the opinion that:

1. KDB is a statutory juridical entity duly established under the Korea Development Bank Act of 1953, as amended, and validly existing under the laws of Korea, with power and authority to own its properties and conduct its business as described in the Prospectus forming a part of the Registration Statement;

2. The Fiscal Agency Agreement has been duly authorized and executed by KDB; and

3. The Securities have been duly authorized, executed, issued and delivered by KDB and constitute valid and binding obligations of KDB enforceable in accordance with their terms.

The opinions set forth above are subject to the following qualifications: (a) the obligations of KDB under the Fiscal Agency Agreement and the Securities and the enforcement thereof may be limited or affected by the laws governing fraudulent conveyance, moratorium, statutory limitation or other similar matters which generally affect the rights of creditors; (b) the obligations of KDB under the Fiscal Agency Agreement and the Securities and the enforcement thereof may be also affected or limited by the general principle of good morals and other social order and the general principle of good faith and fairness provided for in the Civil Code of Korea; (c) nothing herein should be taken as indicating that the remedies of specific performance or injunction would necessarily be available with respect to any particular provision of the Fiscal Agency Agreement, the Securities and any related agreements in any particular instance; (d) the enforceability of provisions releasing or exculpating a party from, or requiring indemnification of a party for, liability for its own action or inaction may be limited or affected where the action or inaction involves unlawful conduct, willful misconduct or gross negligence; (e) Korean courts may exercise judicial discretion in determining such matters as conclusiveness of certificates, amount of damages and entitlement to attorneys’ fees and other costs; and (f) if the Korean government deems that certain emergency circumstances, including but not limited to severe and sudden changes in domestic or overseas economic circumstances, extreme difficulty in stabilizing the balance of payments or in implementing currency, exchange rate and other macroeconomic policies, has occurred or is likely to occur, it may impose certain necessary restrictions provided for under the Foreign Exchange Transaction Law, such as the suspension of payments or requiring prior approval from governmental authorities for any transaction.

The foregoing opinion is confined to and given on the basis of Korean law as in effect on the date hereof and we express no opinion in respect of those matters governed by or construed in accordance with the laws of any jurisdiction other than Korea. To the extent that the laws of the United States of America and the State of New York are relevant to our opinion set forth above, we have, without making any independent investigation with respect thereto, relied upon, and our opinion is subject to the qualifications, assumptions and exceptions set forth in, the opinion, dated October 25, 2021, of Cleary Gottlieb Steen & Hamilton LLP, United States counsel to KDB. We have also assumed that there is nothing in the law of any other jurisdiction which affects this opinion.

We hereby consent to the use of this opinion as an exhibit to the Registration Statement filed by KDB with the SEC. In giving this consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act.

Very truly yours,

/s/ Kim & Chang

Kim & Chang