Masashi Oka

Masashi Oka has over four decades of experience in leadership roles in global financial services and technology enterprises, as well as in non-executive director and advisory roles across financial services, technology, and consulting sectors, in Japan and the United States. 

Oka has served as an Independent Director of NEC Corporation since 2022, where he chairs the Compensation Committee and serves on the Nominating Committee. He joined leading enterprise software investment firm Vista Equity Partners’ Advisory Board in 2023, and Bain & Company’s Global Advisory Council in 2024, representing Asia-Pacific in both organizations.

Oka began his association with Sony Financial Group (SFG) in 2019 as an Independent Director, becoming President & CEO in 2020. During his tenure, he enhanced SFG’s enterprise value, positioning it for an IPO and spinoff in 2025. He transitioned to a Senior Advisor role of SFG and Sony Group Corporation in 2023, continuing through 2024.

At Nikon Corporation, Oka served as Senior Executive Vice President & CFO (2016–2020), leading a major restructuring and global investor relations program that elevated the company’s performance and stock value. He was voted “Best CFO” in the industry by Institutional Investor for three consecutive years.

Oka’s career with Mitsubishi Bank, later MUFG, spanned 37 years including 18 years in the U.S.  As CEO of Union Bank (2010–2014) and CEO for The Americas of MUFG (2012-2014), he led a successful restructuring and integration of MUFG’s Americas operations, and became Executive Chairman of MUFG  Americas Holdings Corporation and MUFG Union Bank in 2014.

Oka holds a Master of Laws from the University of Michigan Law School and a Bachelor of Arts in Law from The University of Tokyo. He was admitted to the New York State Bar in 1986. The extended Oka family resides in Tokyo.