Nagashima Ohno & Tsunematsu
Nagashima Ohno & Tsunematsu offers a broad spectrum of expertise in IP litigation and transactional matters such as due diligence, R&D agreements, AI and big data across a range of industries. The practice is strengthened by the considerable expertise of Shunji Matsuda, as well as Kenji Tosaki, who handles IP infringement litigations and IP invalidation litigations before the IP High Court, the Supreme Court, District Courts and Japan Patent Office. They are joined by Keiji Tonomura, who specialises in cross-border IP transactions with a particular focus on the TMT industry and emergent technologies. Another associate of note is Masashi Chusho.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'There are lot of attorneys who have great experience. Also, the firm introduces and leads legal technology to research in an effective way.'
- 'Partners in the firm publish many helpful articles/books and I use them to support my business.'
- 'We believe Nagashima's IP deparment is superior in international cases to other firms' teams, especially in huge, multi-lateral cases. Nagashima has a large number of IP attorneys who have a rich experience with the U.S. IP firms. They have a capacity to handle big international cases, while keeping its high-quality level and intense communication with foreign clients.'
- 'Shunji Matsuda's thoughtful advice from both a legal and business point of view helps the team make the right decisions in proceedings. He is an excellent communicator and, through conversation with his clients and foreign colleagues, he can identify central issues in each aspect of the proceedings and suggest a practical solution.'
- 'Many of the attorneys have experience in the U.S. and have given us useful advice in our overseas litigation. In addition, many of the attorneys are non-IP attorneys, so they can be trusted with complex matters.'
- 'Shunji Matsuda always comes up with a good solution when I have a discussion with a foreign lawyer that I can't engage.'
- 'NO&T has one of the biggest IP litigation teams in Japan dealing with high-profile cases. Being a larger firm, NO&T has a better command of English than some of the boutique competitors. The team can work collaboratively with several other firms on one large project which is an important factor as the team tends to be quite busy.'
- 'Kenji Tosaki, a former judge, is an experienced partner at the firm dealing with wide range of IP disputes. While Tosaki relies on technical matters to patent attorneys, his experience as a former judge provides a rare insight into how the arguments will be received by the judge.'
Key clients
- Nintendo Co., Ltd.
- Nichia Corporation
- Isuzu Motors Limited
- Nippon Steel Engineering Co., Ltd.
- Mitsubishi Chemical Corporation
- Twitter Inc.
- Sanofi K.K.
- Bushiroad Inc.
- Novartis Pharma K.K.
- CADDI Inc.
Work highlights
- Acted on behalf of Nintendo successfully in an IP litigation matter in Japan (the Tokyo District Court, IP High Court and Supreme Court), where Nintendo filed a lawsuit against Maricar Inc. concerning the protection of famous characters.
- Represented the co-owners of a Japanese patent covering Patanol in a case concerning the JPO’s decision on the request for an invalidation trial to invalidate the patent.
Lawyers
Leading individuals: Bengoshi