Mamoru Iwamoto has served as the Chief Executive Officer, President and a director of Koei Group Co., Ltd. since February 2025. Mamoru Iwamoto founded the Company’s wholly owned subsidiary, KOEI JAPAN CO., LTD., previously known as Koei Shoji Co., Ltd., where he has served as its Chief Executive Officer since its establishment in April 1995, and where he has also served as a representative director from its formation to the present. From January 2023 to the present, Mamoru Iwamoto served as a director of Yokohama Urban Solution Alliance. From September 2009 to January 2016, Mamoru Iwamoto served as a representative director at A.G.S. Corporation.

Tomonari Takayama has served as the Chief Financial Officer, Chief Strategy Officer, and a director of Koei Group Co., Ltd. since August 8, 2024. From August 2024 to February 2025, he served as the Chief Operating Officer of Koei Group Co., Ltd. From March 2017 to February 2020, Tomonari Takayama served as a Director of the Company’s wholly owned subsidiary, KOEI JAPAN CO., LTD., previously known as Koei Shoji Co., Ltd., where he has served as a managing director and as the General Manager of administration and the industrial waste department since March 2020. Tomonari Takayama received his B.A. in English Literature from Hosei University in 1995.

Katsumi Kato has served as the Chief Marketing Officer, Chief Revenue Officer, and a director of Koei Group Co., Ltd. since August 8, 2024. From August 2017 to the present, Katsumi Kato served as the General Manager of the Sales Department of the Company’s wholly owned subsidiary, KOEI JAPAN CO., LTD., previously known as Koei Shoji Co., Ltd., where from September 2018 to February 2021 he also served as the Executive Officer and General Manager of the ITAD Division and where, since March 2021, he has also served as the Director and General Manager of Sales Division and ITAD Division. Katsumi Kato graduated from Nagoya Fashion College with a major in fashion business in 1997.

Ryuma Iwamoto has served as the Chief Operating Officer and a director of Koei Group Co., Ltd. since February 2025. From August 2024 to the present, he has served as a director of the Company’s wholly owned subsidiary, KOEI JAPAN CO., LTD., previously known as Koei Shoji Co., Ltd. From February 2022 to the present, he has served as the Chief Executive Officer of the wholly owned subsidiary, KOEISING PTE. LTD. From June 2018 to July 2023, he worked in a sales manager position at KOEI JAPAN CO., LTD. Ryuma Iwamoto received a B.A. in Child Development Science from Next Generation Education, International Pacific University in 2016.

Robert Wagner has served as Chief Business Officer and Director of Koei Group Co., Ltd. since February 2025. He is also the President & CEO of Koei US, Inc., a subsidiary of Koei Group, where he oversees all aspects of the company’s operations. With more than 20 years of experience as an engineer, primarily in the oil and gas industry, Mr. Wagner brings deep technical expertise and leadership to the organization. He earned a Bachelor of Science in Electrical Engineering from the University of Washington in 2003 and a Master of Science in Electrical Engineering from the same institution in 2013.

Maki Wagner has served as Chief Communications Officer and Director of Koei Group Co., Ltd. since February 2025. She currently leads investor relations for Koei Japan Co., Ltd. and also serves as Chief Communications Officer for Koei US, Inc. In addition, Mrs. Wagner has held the role of Executive Director at the Naoko Mitsui Shirane Foundation since April 2023. She earned a Bachelor’s degree in Education from Aoyama Gakuin University in 2003.

Sachiko Tozawa has served as the Chief Branding Officer and a director of Koei Group Co., Ltd. since February 2, 2025. From October 2017 to the present Sachiko Tozawa has served as the head of the president’s office at the Company’s wholly owned subsidiary, KOEI JAPAN CO., LTD., previously known as Koei Shoji Co., Ltd., where she engages in executive scheduling and coordinating with business strategy.