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Corporate Governance
Executive Members
Audit & Supervisory Board Members
Audit & Supervisory Board Members
As of June 17, 2026
Kazuhiko Masuda

Full-time Audit & Supervisory Board Member
[Date of Birth]
November 25, 1963
- Jun. 2026
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Full-time Audit & Supervisory Board Member (Current position)
- Apr. 2026
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Full-time Adviser
- Jan. 2026
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Corporate Management Division, Corporate Sector
- Apr. 2025
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Deputy Executive Director, Personal Business Sector
- Apr. 2024
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Managing Executive Officer
- Apr. 2022
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Executive Officer, seconded to KDDI Summit Global Myanmar Co., Ltd. (CEO)
- Apr. 2019
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General Manager, Global Consumer Business Division
- Apr. 2017
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Managing Executive Officer, General Manager of Engineering Division of Jupiter Telecommunications Co., Ltd. (Currently JCOM Co., Ltd.)
- Apr. 2015
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Administrative Officer
- Apr. 1987
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Joined DDI CORPORATION (Currently KDDI CORPORATION)
Kazuyasu Yamashita

Full-time Audit & Supervisory Board Member
[Date of Birth]
February 12, 1965
- Jun. 2024
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Full-time Audit & Supervisory Board Member (Current position)
- Jan. 2024
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With headquarters, Corporate Management Division, Corporate Sector
- Apr. 2023
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General Manager, Sustainability Management Division, Corporate Sector
- Apr. 2022
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Deputy General Manager, Sustainability Management Division, Corporate Sector
- Apr. 2018
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General Manager, Global Corporate Management Department, Global Business Planning Division
- Apr. 2010
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General Manager, Intellectual Property Office, Network Technology Division
Kenichi Ogasawara

Full-time Audit & Supervisory Board Member, Independent Director
[Date of Birth]
May 8, 1966
- Jun. 2026
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Full-time Audit & Supervisory Board Member (Current position)
- Jul. 2024
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Deputy Director-General of Overseas Projects, Minister's Secretariat of Ministry of Land, Infrastructure, Transport and Tourism (MLIT)
- Jul. 2023
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Deputy Director-General, Water Management and Land Conservation Bureau of MLIT
- Apr. 2021
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Director of Japan Housing Finance Agency
- Jun. 2020
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Director of Overseas Project Promotion, Policy Bureau of MLIT
- Jul. 2018
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Director of Construction Market Division, Land and Construction Industry Bureau of MLIT
- Apr. 2017
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Minister's Secretariat and Counsellor for Accounting of MLIT
- Apr. 2014
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Deputy Mayor of Kyoto City
- Apr. 2012
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Chief of City Planning Bureau of Kyoto City
- Jul. 2007
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Director for Water Administration Policy Planning of River Bureau of MLIT
- Jul. 2005
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Senior Deputy Director of Minister's Secretariat Budget and Accounts Division of MLIT
- Apr. 1991
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Joined Ministry of Construction (Currently MLIT)
Kazutoshi Kogure

Outside Audit & Supervisory Board Member, Independent Director
[Date of Birth]
January 17, 1959
- Jun. 2024
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Outside Audit & Supervisory Board Member (Current position)
- Dec. 2023
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Audit Committee Member, Sumida Ward, Tokyo (Current position)
- Oct. 2022
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Established Kazutoshi Kogure CPA Office (Representative) (Current position)
- Jul. 2022
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Senior Advisor of The Japanese Institute of Certified Public Accountants
- Jul. 2019
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Deputy President of The Japanese Institute of Certified Public Accountants
- Jul. 2013
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Executive Board Member of The Japanese Institute of Certified Public Accountants
- Jun. 1996
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Partner of Tohmatsu & Co. (Currently Deloitte Touche Tohmatsu LLC)
- Apr. 1985
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Registered as a Certified Public Accountant
- Mar. 1982
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Joined Tohmatsu Aoki & Co. (Currently Deloitte Touche Tohmatsu LLC)
Koji Arima

Outside Audit & Supervisory Board Member, Independent Director
[Date of Birth]
February 23, 1958
- Jun. 2025
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Chairman, Director of DENSO CORPORATION (Current position)
- Mar. 2025
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Outside Director of AGC Inc. (Current position)
- Jun. 2024
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Outside Audit & Supervisory Board Member (Current position)
- Jun. 2023
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Representative Member of the board, Chairman of DENSO CORPORATION
- May. 2022
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Chairman of Japan Auto Parts Industries Association
- Jun. 2015
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Representative Member of the board, President of DENSO CORPORATION
- Jun. 2014
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Senior Executive Director of DENSO CORPORATION
- Jun. 2008
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Executive Director of DENSO CORPORATION