Opinion of Davis Polk & Wardwell LLP

Exhibits 5.2 and 23.3

[LETTERHEAD OF DAVIS POLK & WARDWELL LLP]

December 22, 2023

Sumitomo Mitsui Financial Group, Inc.

1-2, Marunouchi 1-chome

Chiyoda-ku, Tokyo 100-0005, Japan

Ladies and Gentlemen:

Sumitomo Mitsui Financial Group, Inc., a joint stock company with limited liability organized under the laws of Japan (the “Company”), is filing with the U.S. Securities and Exchange Commission a Registration Statement on Form F-3 (the “Registration Statement”) and the related Prospectus (the “Prospectus”) for the purpose of registering under the U.S. Securities Act of 1933, as amended (the “Securities Act”), the Company’s senior debt securities (the “Senior Debt Securities”), dated subordinated debt securities (the “Dated Subordinated Debt Securities”) and perpetual subordinated debt securities (the “Perpetual Subordinated Debt Securities” and, together with the Senior Debt Securities and Dated Subordinated Debt Securities, the “Debt Securities”). The Senior Debt Securities may be issued from time to time pursuant to the Senior Indenture dated as of March 9, 2016, as supplemented by the First Supplemental Indenture dated as of July 16, 2019 (the “Senior Indenture”) between the Company and The Bank of New York Mellon, as trustee (the “Trustee”); the Dated Subordinated Debt Securities may be issued from time to time pursuant to a Subordinated Indenture dated as of September 17, 2019 (the “Dated Subordinated Indenture”) between the Company and the Trustee; and the Perpetual Subordinated Debt Securities may be issued from time to time pursuant to a Perpetual Subordinated Indenture (the “Perpetual Subordinated Indenture” and, together with the Senior Indenture and the Dated Subordinated Indenture, the “Indentures”) to be entered into between the Company and the Trustee.

We, as your counsel, have examined originals or copies of such documents, corporate records, certificates of public officials and other instruments as we have deemed necessary or advisable for the purpose of rendering this opinion.

In rendering the opinions expressed herein, we have, without independent inquiry or investigation, assumed that (i) all documents submitted to us as originals are authentic and complete, (ii) all documents submitted to us as copies conform to authentic, complete originals, (iii) all documents filed as exhibits to the Registration Statement that have not been executed will conform to the forms thereof, (iv) all signatures on all documents that we reviewed are genuine, (v) all natural persons executing documents had and have the legal capacity to do so, (vi) all statements in certificates of public officials and officers of the Company that we reviewed were and are accurate and (vii) all representations made by the Company as to matters of fact in the documents that we reviewed were and are accurate.

Based upon the foregoing, and subject to the additional assumptions and qualifications set forth below, we advise you that, in our opinion, assuming the Indentures and any supplemental indenture to be entered into in connection with the issuance of any Debt Securities have been duly authorized, executed and delivered by the Trustee and the Company; the specific terms of a particular series of Debt Securities have been duly authorized and established in accordance with the applicable Indenture; and such Debt Securities have been duly authorized, executed, authenticated, issued and delivered in accordance with the applicable Indenture and the applicable underwriting or other agreement against payment therefor, such Debt Securities will constitute valid and binding obligations of the Company, enforceable in accordance with their terms, subject to applicable bankruptcy, insolvency and similar laws affecting creditors’ rights generally, concepts of reasonableness and equitable principles of general applicability, and may be subject to possible judicial or regulatory actions giving effect to foreign governmental actions or foreign laws affecting creditors’ rights.