Exhibit 24
                                POWER OF ATTORNEY

          KNOW ALL PERSONS BY THESE PRESENTS that the undersigned, the duty
appointed Minister of Finance of the Government of Japan (the "Minister of
Finance"), does hereby make, constitute and appoint Mr. Makoto Kitamura,
Deputy Director-General of the Financial Bureau, Ministry of Finance, the agent
and attorney-in-fact of the Minister of Finance, to execute and file in his
name and on his behalf amendments to an ownership report on Schedule 13G with
respect to the ownership by the Government of Japan, Minister of Finance of the
Common Stock of Nippon Telegraph and Telephone Corporation ("NTT"), with the
United States Securities and Exchange Commission, the New York Stock Exchange,
Inc. and NTT, hereby giving and granting unto said agent and attorney-in-fact
full power and authority to do and perform each and every act and thing
whatsoever requisite or necessary to be done in and about the premises, as
fully, and to all intents and purposes, as the Minister of Finance might or
could do if personally present at the doing thereof, hereby ratifying and
confirming all that said agent and attorney-in-fact may or shall lawfully do, or
cause to be done, by virtue hereof.

          IN WITNESS WHEREOF, the undersigned has executed this Power of
Attorney this 14 day of February 2017.


                                               /s/ Taro Aso
                                  ----------------------------------------------
                                                   Taro Aso
                                  Minister of Finance of the Government of Japan