Department profile
Nagashima Ohno & Tsunematsu

Intellectual Property: Domestic

Asia-Pacific Guide 2026 : Japan

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Nagashima Ohno & Tsunematsu

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About

Provided by Nagashima Ohno & Tsunematsu

Our intellectual property practice covers not only IP litigation but also IP transactional matters, from the traditional IP transactions, such as licensing or research and development agreements to complex IP M&A, IP finance, IT related matters, or entertainment business, and cutting-edge technology related issues, such as Artificial Intelligence (AI), big data, Standard Essential Patent (SEP) and 5G technology and “C.A.S.E” technology in Automotive industry, De-carbonization, NFT, electric sports, etc.

Our Intellectual Property Practice Group (“IPPG”) consists of members who emphasize IP in their practices to combine, for greater value, the diverse backgrounds and experiences of its members by sharing legal developments, strategy and market understanding relevant to our clients' most important concerns. By combining these diverse resources under the shared goal of providing the best IP legal representation, we hope to exceed the expectations of every client on every matter in which we are called upon to assist.

For more details, please visit our website:

https://www.nagashima.com/en/practices/intellectual_property/

Chambers Review

Provided by Chambers

Intellectual Property: Domestic - Japan

Band 2

What the Team is Known For

Nagashima Ohno & Tsunematsu offers expertise in both litigious and transactional IP matters, including patent invalidation and infringement actions. The firm is recommended for its track record in representing clients at the Tokyo District Court and before the Japan Patent Office, and is often called upon to assist with appeals in the IP High Court. The team also assists clients with the negotiation of licensing, research and development agreements and transactional matters in relation to their intellectual property rights. It regularly undertakes mandates for clients in the chemicals, technology, pharmaceuticals and manufacturing sectors.

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Work Highlights

Provided by Chambers

  • Nagashima Ohno & Tsunematsu represented Nintendo in IP litigation before the Tokyo District Court and IP High Court against Maricar.

Strengths

Provided by Chambers

  • The team not only demonstrates exceptional knowledge but also consistently delivers practical, strategic solutions tailored to each client’s specific needs.

    Intellectual Property: Domestic respondentAsia-Pacific

  • Nagashima Ohno & Tsunematsu is highly experienced and specialised both in infringement and validity questions, with an excellent strategic mindset at all times. It is also very responsive at any time.

    Intellectual Property: Domestic respondentAsia-Pacific

Notable Practitioners

Provided by Chambers

  • Shunji Matsuda
    Shunji Matsuda

    Shunji Matsuda

    Shunji Matsuda has a longstanding IP litigation practice, regularly acting for leading corporations in the electronics, pharmaceuticals and chemical engineering sectors.

    • He has high sense of risk management and is an excellent communicator. When lawyers and clients think differently, he can bridge that gap, which is very important.

      Intellectual Property: Domestic respondentAsia-Pacific

    • Shunji Matsuda is a guarantee that your case is done with the best diligence and best strategic approach.

      Intellectual Property: Domestic respondentAsia-Pacific
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Ranked Individuals at Nagashima Ohno & Tsunematsu (1)

Japan

Members

Provided by Nagashima Ohno & Tsunematsu

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