Notice of Convocation of the 148th Ordinary General Meeting of Shareholders

[Translation]

Securities Code: 9303

To Those Shareholders with Voting Rights

June 4, 2025 Start date of measures for electronic provision: May 30, 2025

Akihito Nagata President

The Sumitomo Warehouse Co., Ltd. 2-18, Nakanoshima 3-chome,

Kita-ku, Osaka, Japan

We are pleased to announce the 148th Ordinary General Meeting of Shareholders of The Sumitomo Warehouse Co., Ltd. (the “Company”).

When convening the Meeting, the Company takes measures for providing information that constitutes the content of reference documents for the general meeting of shareholders, etc. (items for electronic provision) in electronic format, and posts this information on each of the following websites.

The Company’s website:

https://www.sumitomo-soko.co.jp/ir/meeting.html (in Japanese)

Website for posted informational materials for the general meeting of shareholders: https://d.sokai.jp/9303/teiji/ (in Japanese)

Tokyo Stock Exchange website (Listed Company Search): https://www2.jpx.co.jp/tseHpFront/JJK010010Action.do?Show=Show (in Japanese)

(Please access the Tokyo Stock Exchange website above, enter or search for “Sumitomo Warehouse” in “Issuer Name (Company Name)” or the Company’s securities code “9303” in “Code”, select “Basic Information” and then “Documents for Public Inspection/PR Information,” and check the “Notice of General Shareholders Meeting/Informational Materials for a General Shareholders Meeting” under “Filed information available for public inspection”).

If you do not attend the meeting, you may exercise your voting rights in writing or by electronic means (e.g., via the Internet). Please review the Reference Documents for the General Meeting of Shareholders and exercise your voting rights in accordance with the guidance on pages 3 and 4 by 5:00 p.m. on Wednesday, June 25, 2025.

1. Date and Time: 10:00 a.m., Thursday, June 26, 2025
2. Place: “Conference Room,” Festival Suite, 37th Floor,

   Nakanoshima Festival Tower

   3-18, Nakanoshima 2-chome, Kita-ku, Osaka, Japan

3. Agenda:Matters to be reported:

   1. Business Report, Consolidated Financial Statements for the 148th Fiscal Term (from April 1, 2024 to March 31, 2025) and the Results of Audits on Consolidated Financial Statements by the Accounting Auditor and the Board of Corporate Auditors

   2. Non-consolidated Financial Statements for the 148th Fiscal Term (from April 1, 2024 to March 31, 2025)

◎ In the event of any modification to items for electronic provision, a notice and contents, both before and after the modification, will be posted on each of the aforementioned Internet websites.

◎ Under the amended Companies Act, shareholders are expected, in principle, to access and refer to any of the websites mentioned above, except for the shareholders who requested the delivery of paper-based

documents by the record date, to whom the paper-based documents will be delivered. However, for the purpose of this general meeting, we have delivered paper-based documents stating items for electronic provision to all shareholders, regardless of whether or not they have requested them.

The right to vote at the general meeting of shareholders is a principal right of shareholders.

Please exercise your voting rights after reviewing the attached Reference Documents for the General Meeting of Shareholders.

You may exercise your voting rights by one of the following three methods.

Date and Time: 10:00 a.m., Thursday, June 26, 2025

Shareholders attending the meeting in person are kindly requested to submit the Voting Rights Exercise Form that is sent together with this Notice of Convocation at the reception desk of the Conference Room.

Voting Deadline: 5:00 p.m., Wednesday, June 25, 2025

Please indicate your approval or disapproval of each proposal on the Voting Rights Exercise Form that is sent together with this Notice of Convocation, and return it by mail so that it arrives no later than the above voting deadline.

Voting Deadline: 5:00 p.m., Wednesday, June 25, 2025

Please register your approval or disapproval for each proposal no later than the voting deadline. For further information, please see the next page.

1. Shareholders who exercise their voting rights in writing and do not indicate their approval or disapproval of each proposal will be deemed to have indicated their approval of the proposal.

2. When voting rights have been exercised in duplicate in writing and via the Internet, the vote received via the Internet shall be deemed valid.

3. When voting rights have been exercised via the Internet more than once or in duplicate through personal computers, smartphones and mobile phones, the last vote received shall be deemed valid.

This document has been translated from a part of the Japanese original for reference purposes only. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail. The Company assumes no responsibility for this translation or direct, indirect or any other forms of damages arising from the translation.

[Voting by smartphone]

You can simply log in to the voting service website without entering your voting rights exercise code and password.

1. Please scan the QR Code printed on the lower right side of the Voting Rights Exercise Form.

   • “QR Code” is a registered trademark of DENSO WAVE INCORPORATED.

2. Register your approval or disapproval by following the instructions on the screen.

   Please note that exercising voting rights by using “Smart Vote” is available only once.

   If you need to change your votes after exercising your voting rights, please access the voting website for a personal computer(*) and log in by using your voting rights exercise code and password printed on the Voting Rights Exercise Form, and exercise your voting rights again.

   • If you rescan the QR Code, you can access the voting website for a personal computer.

[Voting Service Website Address] https://www.web54.net (This website is available in Japanese only.)

1. Please access the voting service website.

2. Enter your voting rights exercise code printed on the Voting Rights Exercise Form.

3. Enter your password printed on the Voting Rights Exercise Form.

4. Register your approval or disapproval by following the instructions on the screen.

   The shareholders are requested to bear the fees for connecting with internet service providers and other telecommunication charges to access to the Voting Service Website.

   If you have any technical inquiries regarding the operation of a PC, etc. for exercising your voting rights, please contact the following:

   Sumitomo Mitsui Trust Bank, LimitedStock Transfer Agency Business Planning Department Web Support Phone: 0120-652-031 (toll free within Japan)Hours: 9:00 a.m. to 9:00 p.m.Electronic Voting Platform for Institutional Investors

   The “Electronic Voting Platform” operated by ICJ, Inc. is available for institutional investors that have applied in advance to use the platform.

   Reference Documents for the General Meeting of ShareholdersProposal No. 1: Appropriation of Surplus

   The Company’s Three-Year Medium-Term Business Plan, which began in FY2023, calls for maintaining a minimum annual dividend of ¥100 per share while sustaining the necessary business investments to improve corporate value on the medium to long term, and targeting for a dividend on equity (DOE) level of 3.5% to 4.0% while considering the improvement of profitability in each fiscal year.

   Accordingly, the Company proposes an annual dividend of ¥103 per share for the current fiscal year, an increase of ¥2 per share over the previous fiscal year’s results, and a year-end dividend of ¥52.50 per share after deducting the interim dividend of ¥50.50 per share already paid.

   Matters related to the year-end dividend

   1. Type of the dividend property:

      Cash

   2. Matters related to and the aggregate amount of the dividend property to be allotted to shareholders:

      Per ordinary share of the Company: ¥52.50

      Total ¥4,058,948,670

   3. Effective date of dividends of surplus: June 27, 2025