Mr Keiji Tonomura > Nagashima Ohno & Tsunematsu > Tokyo, Japan > Lawyer Profile

Praised by clients for its ‘exceptional ability to address the evolving legal landscape’, the team at Nagashima Ohno & Tsunematsu‘s advises clients on both domestic and cross-border regulatory and transactional matters across the IT, telecoms, entertainment, and media industries. The team is jointly led by Soichiro Fujiwara, who advises traditional and newly transformed tech companies on software and online gaming matters, and Keiji Tonomura, who brings a unique combination of M&A, IP, and tech-related expertise. Ryo Okubo is well-versed in space and IT matters, particularly for start-ups and tech companies, while Masaki Mizukoshi is a member to note in relation to Japanese broadcasting laws and media-related transactions.

The fintech team at Nagashima Ohno & Tsunematsu has extensive experience representing major Japanese banks and financial institutions in business developments and reforms involving mobile payments, biometric authentication, AI, and related technologies. Led by Taku Umezawa and Keiji Tonomura, the team assist with collaborations, joint ventures, and acquisitions of fintech startups. Umezawa is prominent in financial regulation area and data protection, while Tonomura focuses on tech-related transactions, data protection and privacy. Another name to note is Shu Sasaki, who has been focusing on financial regulation and fintech matters.

The team at Nagashima Ohno & Tsunematsu handles both IP litigation and transactional matters, including due diligence, licensing, and R&D agreements, with a focus on tech areas like AI and big data. Shunji Matsuda leverages his extensive experience with the Japanese government and public sector agencies to advise clients on IP litigation, while Kenji Tosaki is well-versed in pharma-related IP disputes. Keiji Tonomura has deep expertise in domestic and cross-border IP and IT transactions, including data security and privacy. Atsushi Yamaguchi was promoted to partner in January 2024.