Data Protection and Privacy 2025

JAPAN Law and Practice Contributed by: Yoshifumi Onodera, Hiroyuki Tanaka, Naoto Shimamura and Rio Ichii, Mori Hamada & Matsumoto

Mori Hamada & Matsumoto is a full-service law firm that has served clients with distinction since its establishment in December 2002. The firm has experienced lawyers with consider - able expertise in the constantly evolving and increasingly complex areas of information tech - nology, life sciences and intellectual property, providing a variety of legal services in response to the diverse legal needs of its clients. These

legal services include advising on regulatory requirements, setting up business, corporate housekeeping, contract negotiations and dis - pute resolution. In terms of data protection, the firm has noted expertise in leveraging user in - formation while protecting clients’ businesses. Mori Hamada & Matsumoto’s data protection team comprises approximately 130 lawyers.

Authors

Yoshifumi Onodera is a partner at Mori Hamada & Matsumoto. He is highly experienced in data- related matters involving communication, media, competition, consumer and/or

Hiroyuki Tanaka is a partner at Mori Hamada & Matsumoto, admitted to practice in Japan (Daini Tokyo Bar Association) and New York. His practice areas are data protection, IT and

information laws, and particularly adept at advising both foreign and domestic clients on complex business structures spanning vast content and communication-related industries, including internet-related services, social networking services, games, music, movies and telecommunications. His expertise also extends to IP-related transactions, concerning licensing and dispute resolution aspects in the subsidiary fields of infringement litigation, invalidity trials, appellate litigation and arbitration, and licensing in relation to intellectual property, including patents, trade marks and copyright.

IP, and he has substantial experience in advising foreign clients on Japanese data protection law. He is also familiar with global data protection regulations, including the GDPR and CCPA, and helps Japanese clients with global data protection compliance by working closely with local counsels. He advises on AI (especially generative AI) and the protection of cybernetic avatars, and is an adjunct project professor at Keio University Graduate School of Law.

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