
Intellectual Property High Court orders generic drug companies to pay approximately JPY 21.7 billion in total in a patent infringement lawsuit (Judgment rendered May 27, 2025)
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We handle a wide variety of disputes and provide pre-dispute advice. Our successful litigation and settlement practice spans all areas of intellectual property law, with particular emphasis on contentious work in the fields of not only patents and utility models, but also trademarks, design rights, copyrights, passing-off and other violations of the Act on Prevention of Unfair Competition. We also have ample experience in employee invention compensation cases. Our lawyers, including former judges of the Intellectual Property High Court and lawyers with technical backgrounds, who are familiar with both law and technology, pour their energy and skill into resolving the disputes, bringing fruitful results in many leading cases.
Many of our lawyers have substantial experience with IP litigation and arbitration not only in Japan but also in the United States and other leading commercial jurisdictions. This breadth of exposure forms the basis of a cross-border window, which we think is unique in Japan: the ability to provide foreign clients with familiar context and reference points in making key litigation decisions.
International Arbitration & Corporate Crime Forum
Yoshihiro Takatori
Mori Hamada & Matsumoto Tokyo Office
LESI 2025 Annual Conference
Takahiro Hatori (Panelist)
Suntec Singapore Convention & Exhibition Centre
AIPLA/AIPPI・JAPAN Spring Meeting
Kenji Tosaki
Vision Center Tokyo Toranomon
2025 JPAA IP Practitioners Seminar
Masashi Chusho
New World Makati Hotel (Manila)
2024 TIPA International Symposium
Kenji Tosaki
National Taiwan University (NTU) / Online
Technology & Innovation Seminar
Keiji Tonomura, Minh Thi Cao Koike, Yuki Matsumiya, Hiroya Nadamoto
Online (On-Demand)
Kenji Tosaki, Ryo Tonomura (Co-author)
Kenji Tosaki, Takahito Hirayama (Co-author)
Kenji Tosaki, Nozomi Kato (Co-author)
Kenji Tosaki, Masato Kumeuchi, Soichiro Unami (Co-author)