Having served as a public prosecutor from the outset of his career, where he was engaged in criminal investigations and trials, and organizational and risk management at the Public Prosecutors Office nationwide, Ryotaro Oba was also involved in the administration of legal affairs and providing legal technical assistance to foreign nations in Asia for the purpose of the development of laws at the Ministry of Justice, and the development of the accessibility to justice at the Japan Legal Support Center. Wishing to utilize this rich experience after retiring from the position of a Superintending Prosecutor, Mr. Oba registered as an attorney-at-law in April 2023. Since doing so, he has been engaged in corporate fraud investigations for companies and other entities, criminal complaints and trials, while also giving lectures on the topic of ‘Criminal Justice and Risk Management’. Having qualified as a Certified Fraud Examiner (CFE) in September 2024, Mr. Oba strives to continue meeting a wide range of legal service needs for his clients
Education & Professional Career
Sep 2024
Qualified as a Certified Fraud Examiner (CFE)
Apr 2023 –
Present Kitahama Partners, Of Counsel
Apr 2023
Admitted to practice in Japan
Jan 2023
Retired from the position of Superintending Prosecutor
Sep 2021
Nagoya High Public Prosecutors Office, Superintending Prosecutor
Mar 2020
Sendai High Public Prosecutors Office, Superintending Prosecutor
Apr 1986 – Feb 2020
Appointed as a Public Prosecutor at the Yokohama District Public Prosecutors Office, served at the Naha, Chiba, Tokyo, Yamagata, Kushiro, and Tsu District Public Prosecutors Offices and the Supreme Public Prosecutors Office; served at the Ministry of Justice, the Japan Legal Support Center, the Cabinet Secretariat, and the Research and Training Institute of the Ministry of Justice
Mar 1986
Graduated from the Legal Training and Research Institute of the Supreme Court of Japan
Mar 1984
Waseda University (LL.B.)
Other Activities
Jun 2025
Audit and Supervisory Board Member, The Kyoritsu Co., Ltd.