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 1973. After joining a leading finance company, Tsuchiya engaged in sales planning, marketing and financing. In 2002, he joined Bridal Net, Inc. Following the merger with IBJ, he was appointed Director of IBJ, Inc. in 2009. In 2017, he was appointed Managing Director of IBJ, Inc.

Born in 1981. Yokogawa joined cerebrix Inc. After serving as Representative Director of two other companies, he became Executive Vice President of Style Edge Inc. in 2012; in 2017, he became Director of IBJ Inc. He then became Representative Director of Sanmarie Inc. in 2019, Representative Director of Sellfit Inc. in 2023, and Executive Vice President of O-Net Inc. in 2024.

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 Outside Director of IBJ, Inc.

Born in 1975, joined The Industrial Bank of Japan, Limited (currently Mizuho Bank, Limited) in 1999.In 2003, she joined The Japan Research Institute, Limited, where she has been engaged in research and consulting for government agencies, local governments, and corporations, and is currently an Expert at the Center for Emergent Strategies.She specializes in corporate research in the ESG field, SDGs and corporate management, climate change and finance, and child participation theory.In 2024, She became an outside director of IBJ, Inc.

Born in 1989, she entered the Faculty of Economics and Business Administration at Fukushima National University in 2008, where she studied statistics and marketing.After graduating from college, she worked for a company before going independent in 2017.Started data analysis and statistical analysis business.In 2020, Delta Create, LLC was opened.She runs the YouTube channel “Mystery Statistics|Satomai”.In 2024, She became an outside director of IBJ, Inc.

Born in 1972. Futatsuya joined Japan Air Self-Defense Force in 1991. From 2002, she worked as a wedding planner. After joining IBJ, Inc. in 2010, she oversaw multiple business departments, and in 2017, was appointed Director of IBJ Life Design Support Inc. In 2020, she was appointed Director of IBJ, Inc., and in 2023, Auditor of IBJ, Inc.

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 1958, he joined the Ministry of Home Affairs (now the Ministry of Internal Affairs and Communications) in 1980. He has held important positions at the Ministry of Land, Infrastructure, Transport and Tourism and the Council of Local Authorities for International Relations. He later served as Vice Governor of Shiga Prefecture, Director of the Local Autonomy and Taxation Bureau of the Ministry of Internal Affairs and Communications, and Representative Director and Senior Managing Director of Metropolitan New Urban Railway Co,In 2025, he was appointed as a corporate auditor of IBJ Co.