POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that the undersigned, hereby constitutes
and appoints Jeremy Cleveland, signing singly and with full power of
substitution and resubstitution, the undersigned's true and lawful attorney-in-
fact to:

     (1)     execute for and on behalf of each of the undersigned, in the
undersigned's capacity as an executive officer or director of Sumitomo Chemical
Co., Ltd. (the "Company"), Forms 4, including any amendments thereto, in
accordance with Section 16(a) of the Securities Exchange Act of 1934 and the
rules and regulations thereunder (the "Exchange Act"), solely with respect to
the sale of securities of Roivant Sciences Ltd. (the "Securities");

     (2)     do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any such
Form 4, including any amendments thereto, and timely file such form with the
United States Securities and Exchange Commission and any stock exchange or
similar authority, solely with respect to the Securities; and

     (3)     take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interests of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-fact's discretion.

     The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
any of the undersigned's responsibilities to comply with Section 16 of the
Exchange Act.

     This Power of Attorney shall remain in full force and effect until
August 30, 2023, when it shall automatically expire, unless earlier revoked by
the undersigned in a signed writing delivered to the foregoing attorneys-in-
fact.


                           [Signature page to follow]


     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 15th day of June, 2023.

                                        Sumitomo Chemical Co., Ltd.

                                        By: /s/ Takeo Kitayama
                                            ------------------------------------
                                            Name:  Takeo Kitayama
                                            Title: Executive Manager
                                                   General Manager
                                                   Corporate Planning Office