Born in 1971. Ishizaka joined The Industrial Bank of Japan, Ltd. (currently Mizuho Bank, Ltd.).
In 2001,he was appointed President and CEO of Bridal Net, Inc.
In 2006 , he was appointed President and CEO of IBJ, Inc.

Born in 1981. Yokogawa joined Cerebrix Holdings (currently Cerebrix Corporation), engaging in sales and marketing. He subsequently served as President and CEO of two companies and in 2012 was appointed Executive Vice-President of STYLEEDGE Co., Ltd. In 2017, he was appointed Director of IBJ, Inc.

Born in 1940. Umezu joined the Industrial Bank of Japan (currently Mizuho Financial Group, Inc.) and served as Managing Director. After serving as President and CEO of Industrial Bank NW Asset Management Co., Ltd. (currently Asset Management One, Co., Ltd.) and as President and CEO of NU Intellectual Property Financial Services Co., Ltd. (founding member), in 2022 he was appointed Independent Director of IBJ, Inc.

Born in 1981. Kamachi joined Chuo Aoyama Tax Accountant Office (currently PwC Tax Japan). After registering as a chartered accountant and certified tax accountant, he served as a representative of the Kamachi Tax Accountant Office, and in 2022 he was appointed Independent Director of IBJ, Inc.

Born in 1972. Kawaguchi joined Mitsui & Co., Ltd. in 1995. In 2000, he served as Corporate Audit Staff (CAS) of the General Electric Company in the U.S. In 2005, he joined Globis Capital Partners. During his tenure at the company, he served as an Independent Director of IBJ, Inc. until 2012. In 2015, he was appointed Auditor of IBJ Inc. He is a Certified Information Systems Auditor (CISA) and Certified Fraud Examiner (CFE).

Born in 1937. Teramura joined the Ministry of Finance in 1961. He has held prominent positions, including Director General of the Minister’s Secretariat of the Economic Planning Agency, Director of the Finance Ministry’s Banking Bureau, and Commissioner of the National Tax Agency. In 2007, he was appointed Auditor of IBJ, Inc.

Born in 1962. Yagi is a graduate of the University of Tsukuba’s Graduate School of Comprehensive Human Sciences Master’s Program with an M.A. in Counseling. She has held key positions including in Sony Corporation’s Corporate Strategy Department and Global Alliance Department. In 2005, she joined Polaris Capital Group, Co., Ltd., working in investment, IR, and business administration before becoming an advisor. In 2014, she was appointed Auditor of IBJ, Inc.