📋 Material Events 1086

RIKEI CORPORATION

8226 · 株式会社 理経

The company's Board of Directors resolved on March 16, 2026 to change its Representative Director (CEO). Makoto Koyanagi will transition from Executive Vice President (常務取締役) to Representative Director and President (代表取締役社長) effective June 26, 2026. Current CEO Satoru Inozaka will step down from the CEO position and assume an advisory role (相談役).

SUMITOMO HEAVY INDUSTRIES,LTD.

6302 · 住友重機械工業株式会社

Silchester International Investors LLP ceased to be a major shareholder of the company as its voting rights decreased from 10.50% (125,961 voting rights) to 9.46% (113,461 voting rights) as of February 25, 2026. This change falls below the major shareholder threshold and is reported in accordance with the Financial Instruments and Exchange Act Article 24-5(4).

NISSAN TOKYO SALES HOLDINGS CO., LTD.

8291 · 日産東京販売ホールディングス株式会社

The company's Board of Directors resolved on March 12, 2026 to change its representative director (CEO). Toshihiko Kikuchi will be promoted from Managing Executive Officer to Representative Director and President effective April 1, 2026. Akira Takebayashi will transition from Representative Director and President to Chairman of the Board.

OSAKA GAS CO.,LTD.

9532 · 大阪瓦斯株式会社

The company's board of directors resolved on March 13, 2026 to change its representative director effective April 1, 2026. Toshiyuki Imai, currently Senior Managing Executive Officer and Director, will be promoted to Representative Director, while Takayuki Tasaka, the incumbent Representative Director and Senior Managing Executive Officer, will step down from the representative director position but remain as Director.

MIZUHO MEDY CO.,LTD.

4595 · 株式会社ミズホメディー

The company's Board of Directors resolved on February 24, 2026 to restructure its representative director positions effective March 27, 2026. Karakawa Bunsei will transition from Representative Director (President and Chairman) to Representative Director (Chairman), while Narahara Kenji will be promoted from Director to Representative Director (President). This represents a planned leadership succession with the incumbent CEO moving to chairman role and an internal executive assuming the presidency.

PIXEL COMPANYZ INC.

2743 · ピクセルカンパニーズ株式会社

The company appointed two temporary auditors following the resignation of its previous accounting auditor firm (監査法人アリア) on November 19, 2025. The Audit & Supervisory Committee resolved on January 22, 2026 to appoint CPAs Akasaka Mitsutoshi (赤坂満秋) and Kaio Hiroaki (海生裕明) as temporary auditors to maintain appropriate audit operations.

I-FREEK MOBILE INC.

3845 · 株式会社アイフリークモバイル

A major shareholder change was reported as of March 6, 2026. Shin Sawa increased their voting rights from 3.96% to 19.70% (8,812 to 43,812 voting shares), while Sumo Japan Ventures Segregated Portfolio of Fundviews SPC Ltd. ceased to be a major shareholder, decreasing from 15.74% to 0% (35,000 to 0 voting shares).

CHUO SPRING CO.,LTD.

5992 · 中央発條株式会社

Mikujiro Ueshima became a major shareholder of the company, increasing his voting rights from 9.30% (23,390 voting units) to 13.73% (34,556 voting units) as of March 2, 2026. This change triggers mandatory disclosure under the Financial Instruments and Exchange Act Article 24-5(4) due to the shift in major shareholder status.

NIKKON Holdings Co.,Ltd.

9072 · ニッコンホールディングス株式会社

Oasis Management Company Ltd. has become a major shareholder of the company, increasing its voting rights from 9.92% (117,074 shares) to 12.39% (146,167 shares) as of March 10, 2026. This change in major shareholder composition is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4) and related regulations.

SOTOHCO.,LTD.

3571 · 株式会社ソトー

Daidou Limited has ceased to be a major shareholder of the company, with its voting rights decreasing from 15,950 shares (12.68%) to 11,950 shares (9.50%) as of February 20, 2026. This change is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4), requiring disclosure of material changes in major shareholders and their voting rights.

THE HANSHIN DIESEL WORKS, LTD

6018 · 阪神内燃機工業株式会社

Old Peak Group Ltd. has become a major shareholder of the company, with its voting rights increasing from 9.87% to 10.89% (3,189 to 3,521 voting rights) as of March 3, 2026. This change is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4) and Cabinet Office Ordinance requirements for disclosure of material shareholding changes.

Internetworking & Broadband Consulting Co., Ltd.

3920 · アイビーシー株式会社

Hikari Tsushin Co., Ltd. and two joint holders (UH Partners 2 Co., Ltd. and UH 5 Co., Ltd.) increased their combined voting rights from 8.60% to 10.13% of total shareholder voting rights as of February 20, 2026. This major shareholder change is reported in accordance with the Financial Instruments and Exchange Act Article 24-5(4).

OBAYASHI CORPORATION

1802 · 株式会社大林組

The company's Board of Directors resolved on March 6, 2026 to change the representative director (CEO). Yasuo Morita will become the new representative director in late June 2026 following shareholder approval, while current CEO Atsushi Sasagawa will transition to the position of Director and Vice Chairman effective March 31, 2026, and will retire from the board after the June 2026 annual shareholder meeting.

DOWA HOLDINGS CO.,LTD.

5714 · DOWAホールディングス株式会社

Silchester International Investors LLP ceased to be a major shareholder of the company following a reduction in voting rights from 10.53% to 9.32% (63,249 to 56,017 voting shares) as of March 5, 2026. This change is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4) and related regulations regarding material shareholder status changes.

PRESS KOGYO CO.,LTD.

7246 · プレス工業株式会社

The company's board of directors approved a management change on March 10, 2026, effective April 1, 2026. Two executives, Goichi Karasaki and Masahiko Sato, were promoted to Representative Directors (Senmu Torishimariyaku), while Noboru Masuda stepped down from his position as Representative Director Vice President (Fuku-Shacho) to become a regular Director. Both newly appointed representatives have served the company for over 40 years with progressive career advancement.

HALOWS CO.,LTD.

2742 · 株式会社ハローズ

FMR LLC, a major shareholder, increased its voting rights from 9.12% to 10.07% (from 19,441 to 21,474 voting units) as of February 27, 2026. This change exceeds the materiality threshold for reporting under the Financial Instruments and Exchange Act Article 24-5 and requires disclosure via an extraordinary report.

NIHON DENKEI CO.,LTD.

9908 · 日本電計株式会社

The company's Board of Directors resolved on March 10, 2026 to transition leadership, with Shinsuke Wada (age 58) being promoted from Senior Managing Director and Head of Sales Division to Representative Director and President effective April 1, 2026. Yukiya Morita (age 62), the current Representative Director and President, will transition to the newly created position of Chairman of the Board.

KURAMOTO CO.,LTD.

5216 · 株式会社倉元製作所

The company's Board of Directors resolved on February 16, 2026 to change its representative directors effective March 26, 2026. Toshiyuki Watanabe will step down as Representative Director and President, replaced by Shoji Hoshi as Representative Director and CEO, and Mamoru Komine as Representative Director and President and CFO.

Nippon Light Metal Holdings Company, Ltd.

5703 · 日本軽金属ホールディングス株式会社

The company announced that Shuichi Asagino will be appointed as Representative Director and President effective April 1, 2026, transitioning from his current role as Director and Senior Executive Officer. Asagino has extensive experience including prior service as Representative Director and President of Japan Light Metal MCA Aluminum Co., Ltd., and has been with the company as Director since June 2021.

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The company's Board of Directors approved a change in representative director effective April 1, 2026. Takafumi Miura will be promoted from Director to Representative Director, while Kimio Sakai will transition from Representative Director & Chairman to Director.

SHIMIZU CORPORATION

1803 · 清水建設株式会社

Kentaro Ikeda, Representative Director and Vice President, will resign from his position as representative director at the end of the ordinary general meeting of shareholders scheduled for late June 2026. He will transition from his current role of Representative Director Vice President to simply Vice President Executive Officer, effectively stepping down from the company's top management tier.

CHIIKISHINBUNSHA CO.,LTD.

2164 · 株式会社地域新聞社

The company reported a material change in major shareholders as of February 28, 2026. Mitsubishi UFJ e-Smart Securities Co., Ltd. and Japan Securities Finance Co., Ltd. became major shareholders, while LLC YN Planning ceased to be a major shareholder. The changes reflect shifts in voting rights ownership resulting from stock transfers and credit trading transactions.

Belc CO., LTD.

9974 · 株式会社ベルク

FMR LLC, a major shareholder, increased its shareholding from 9.99% to 10.00% of total voting rights as of February 27, 2026. This change triggered mandatory disclosure under the Financial Instruments and Exchange Act Article 24-5(4), as the shareholder crossed the 10% threshold of voting rights.

ANAP HOLDINGS INC.

3189 · 株式会社ANAP

EUROCLEAR BANK S.A./N.V. has become a major shareholder of the company, increasing its voting rights from 0.96% (360,100 shares) to 11.48% (4,956,000 shares) as of February 28, 2026. This material change in major shareholder composition is being reported in accordance with the Financial Instruments and Exchange Act.

KOMATSU MATERE Co., Ltd.

3580 · 小松マテーレ株式会社

The company announced a planned change in representative director leadership effective April 1, 2026. Toshiyasu Yonetani will be promoted from Senior Executive Director to Representative Director and Senior Managing Director, while Hisaei Sasaki will transition from Representative Director and Chairman to Chairman (non-representative). Yonetani has 34 years of tenure with the company and extensive operational experience.

V-cube, Inc.

3681 · 株式会社ブイキューブ

The company underwent a management succession following the 26th Annual Shareholders Meeting. Junzo Mizutani was promoted from Representative Director Vice President and COO to Representative Director President, while Naoaki Mashimo transitioned from Representative Director President to Chairman of the Board. Masaya Takada retired from his position as Representative Director Vice President upon the expiration of his term.

Sumitomo Mitsui Financial Group, Inc.

8316 · 株式会社三井住友フィナンシャルグループ

Mikami Takeshi, who served as Representative Executive Officer and Executive Vice President, will resign from his position effective April 1, 2026. The company held 130,728 ordinary shares as of September 30, 2025. This filing is submitted in accordance with the Financial Instruments and Exchange Act Article 24-5(4) and Cabinet Office Ordinance Article 19(2)(9).

ISUZU MOTORS LIMITED

7202 · いすゞ自動車株式会社

The company announced a management restructuring effective April 1, 2026, involving a CEO succession. Masahiro Yamaguchi will be promoted from Senior Executive Officer to Representative Director and President/CEO, while current Representative Directors Masanori Katayama and Shinsuke Minami will transition to Chairman and Vice Chairman roles respectively.

monoAI technology Co.,Ltd.

5240 · monoAI technology株式会社

The company announced a change in representative director positions effective March 27, 2026. Yoshitaro Honjo was promoted from Chairman to President, while Masaki Yamashita resigned from his position as Representative Director and President.

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Two Representative Directors (Shimokuchi Yukinori and Okuyama Hajime) will resign from their positions effective April 1, 2026. Both will transition to the role of full-time Director serving on the Audit & Supervisory Committee. This change is reported under the Financial Instruments and Exchange Act Article 24-5(4).

Monstarlab Inc.

5255 · 株式会社モンスターラボホールディングス

The company announced the replacement of its accounting auditor (監査公認会計士) effective March 31, 2026. The incumbent auditor, Sanyu Audit Corporation (三優監査法人), will be replaced by A&A Partners Audit Corporation (監査法人Ａ＆Ａパートナーズ) following the expiration of the current term at the 20th ordinary general meeting of shareholders. The change was decided based on a comprehensive review of audit responsiveness and cost appropriateness relative to the company's business scale and recent operating environment.

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Four representative directors will step down from their positions on April 1, 2026, following a board resolution on March 5, 2026. The executives—Ichiro Takahara, Minoru Saotome, Keitaro Tsukiyama, and Toshiki Ochi—will transition to positions as directors without representative director status, though they will retain their executive officer roles.

Mitsubishi UFJ Financial Group, Inc.

8306 · 株式会社三菱UFJフィナンシャル・グループ

The company's board of directors resolved on March 5, 2026 to appoint two new Representative Executive Officers (代表執行役) effective April 1, 2026. Takuya Tanaka will be promoted to Representative Executive Officer and Senior Managing Director, while Yoshiaki Ueno will be promoted to Representative Executive Officer and Managing Director, both transitioning from their previous positions as Managing Executive Officers.

Neural Group Inc.

4056 · ニューラルポケット株式会社

The company announced a change in its accounting auditor effective March 27, 2026. ES Next Limited Liability Audit Corporation will retire upon completion of the 8th Regular Shareholders Meeting, and will be replaced by Avantia Audit Corporation. The change is driven by the need for audit capabilities better suited to the company's M&A-focused growth strategy and group expansion.

ASIAN STAR CO.

8946 · 株式会社ASIAN STAR

The company's current auditor, Audit Corporation Mahoroba, is being replaced by Seiryū Audit Corporation effective March 27, 2026. The change is necessitated by Mahoroba's removal from the registered list of auditors for listed companies, making continued audit services impossible. The new auditor was selected after reviewing firms appropriately sized for the company's business scale and audit fee reasonableness.

SHINWA WISE HOLDINGS CO.,LTD.

2437 · Shinwa Wise Holdings株式会社

Yoichi Yoneda was appointed as new Representative Director and President on March 1, 2026, succeeding Kenji Takahashi who remains as Director. Yoneda brings extensive experience in investment banking, transaction advisory, and multiple executive roles across financial and investment firms. This change was approved by the Board of Directors meeting held on February 27, 2026.

WORKMAN CO.,LTD.

7564 · 株式会社ワークマン

The company's Board of Directors resolved on February 27, 2026 to change its representative director (CEO). Koji Ouchi will transition from Director of Product Headquarters to Representative Director and President effective April 1, 2026, succeeding Hideyuki Kohama who will remain as a Director.

RYOHIN KEIKAKU CO.,LTD.

7453 · 株式会社 良品計画

Capital Research and Management Company increased its voting rights in the company from 9.53% to 10.43% (528,322 to 578,401 voting rights) as of February 24, 2026. This change in major shareholder status is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4) and triggers the requirement for an extraordinary report (臨時報告書).

ahjikanco.,ltd

2907 · 株式会社あじかん

The company's board of directors resolved on March 2, 2026, to change its representative director (代表取締役) effective April 1, 2026. Koji Fukushima, currently Senior Executive Officer and head of the Sales Division, will assume the position of Representative Director and Senior Executive Officer. The incumbent representative director, Tomatsu Esumi, will step down from the representative director role but remain as a director and senior executive officer.

DAIICHI SANKYO COMPANY, LIMITED

4568 · 第一三共株式会社

The company's Board of Directors resolved on February 26, 2026, to change its representative directors effective June 22, 2026. Two new representative directors will be appointed: Takashi Matsumoto (former Senior Executive Officer and Director) and Shitsuko Ueno (former Senior Executive Officer and Director), while incumbent Representative Director and Chairman Atsushi Manabe will retire to become Permanent Advisor.

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Mizuho Bank announced a change in Representative Director effective April 1, 2026. Tatssuya Kurosawa will become Representative Director assuming the role of Chief Governance Officer (CGO), while Masayuki Sugahara will step down from the Representative Director position and transition to Deputy President (取締役副頭取).

Mizuho Financial Group, Inc.

8411 · 株式会社みずほフィナンシャルグループ

Mizuho Financial Group announced the appointment of Masayuki Sugawara as new Representative Executive Vice President (代表執行役副社長) effective April 1, 2026, succeeding Hidekatsu Takei who will transition to Chairman of the Board. Sugawara brings extensive international banking experience, including leadership roles in Asia and corporate & investment banking divisions across both the parent company and Mizuho Bank.

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AXA Holdings Japan announced a CEO transition effective April 1, 2026, with Christophe Avnel, currently Vice President and CFO of AXA Life Insurance, succeeding Seiji Yasufuchi as President and CEO. Yasufuchi will transition to Director role, ending his tenure as Representative Director and CEO on March 31, 2026.

DAIKEN MEDICAL CO.,LTD

7775 · 大研医器株式会社

The company's Board of Directors resolved on February 27, 2026, to change its representative director. Masayuki Yamada will assume the position of Representative Director and President on April 1, 2026, succeeding Keiichi Yamada, who will transition to Chairman. Yamada (Masayuki) brings over 43 years of company tenure with extensive experience in development, sales, and management roles.

FUJI CO., LTD.

8278 · 株式会社フジ

On February 19, 2026, the company's board of directors resolved to change the representative director (代表取締役). Kenichi Hirao will step down from his position as Representative Director and Vice President (代表取締役副社長) and transition to Director (取締役) effective March 1, 2026.

Hmcomm Inc.

265A · Hmcomm株式会社

The company's Board of Directors and Audit & Supervisory Board resolved to change the company's certified public accountant (auditor) from EY Shin-Nihon Limited Liability Audit Corporation to Toyo Audit Corporation, effective March 27, 2026, following the expiration of the current auditor's term. The change was approved at an Audit & Supervisory Board meeting on February 27, 2026, and will be submitted to shareholders at the 14th ordinary general meeting of shareholders scheduled for March 27, 2026.

NSW Inc.

9739 · NSW株式会社

The company's Board of Directors resolved on March 2, 2026 to appoint Daisuke Takemura as an additional Representative Director, effective April 1, 2026. Takemura will transition from his current position as Executive Vice President and Director to Representative Director, while maintaining his current operational responsibilities. He brings over 25 years of experience with the company, having joined in 2001 and progressed through various executive leadership roles.

AltPlusInc.

3672 · 株式会社オルトプラス

Okazaki Taisuke's status as a major shareholder changed due to dilution from warrant exercises. His voting rights remained at 80,000 shares, but his percentage ownership decreased from 10.62% to 9.95% following the issuance of new shares from the 11th warrant exercise on February 16, 2026.

ITOCHU Corporation

8001 · 伊藤忠商事株式会社

Berkshire Hathaway Inc., through its wholly-owned subsidiary National Indemnity Company, crossed the 10% voting rights threshold in the reporting company by acquiring additional shares. The shareholding increased from 9.54% (676.234 million shares) to 10.07% (704.7995 million shares) as of February 27, 2026, triggering mandatory disclosure under the Financial Instruments and Exchange Act.

Mirative Co., Ltd.

472A · 株式会社ミラティブ

Risona Asset Management Co., Ltd. has increased its voting rights stake in the company from 9.74% to 10.83% as of February 20, 2026. This change in major shareholder status is reported pursuant to the Financial Instruments and Exchange Act Article 24-5(4) and related cabinet office ordinances.