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Abe, Ikubo & Katayama

Intellectual Property: Domestic

Asia-Pacific Guide 2026 : Japan

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Abe, Ikubo & Katayama

Rankings

Chambers Review

Provided by Chambers

Intellectual Property: Domestic - Japan

Band 1

What the Team is Known For

Abe, Ikubo & Katayama has a market-leading practice with experience defending multinationals in litigation related to IP infringement and invalidation actions. The firm takes on high-profile cases regarding patents, and offers strong technical knowledge in such industries as biotechnology, telecommunications and electronics. It has noted expertise in the pharmaceuticals and automotive sectors, and is highly accomplished in representing clients before the Japan Patent Office as well as the IP High Court and the Supreme Court. The team is also able to assist clients with patent portfolio management and protection strategy.

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Work Highlights

Provided by Chambers

  • Abe, Ikubo & Katayama represented Cygames in patent infringement litigation cases filed by Konami Digital Entertainment regarding the game “Uma Musume Pretty Derby”.

Strengths

Provided by Chambers

  • Not only simple domestic matters, but the law firm also can handle international disputes involving US Companies.

    Intellectual Property: Domestic respondentAsia-Pacific

  • Abe, Ikubo & Katayama have talents with a high level of expertise in all technical fields and provide a very deep and wide range of services. The service is of a high standard in all areas.

    Intellectual Property: Domestic respondentAsia-Pacific

Notable Practitioners

Provided by Chambers

  • Eiji Katayama
    Eiji Katayama

    Eiji Katayama

    Eiji Katayama is an eminent lawyer whose engineering background serves his patent litigation practice well.

    • He has a very wide range of experience and skills and can handle overseas clients.

      Intellectual Property: Domestic respondentAsia-Pacific
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  • Mami Hino
    Mami Hino

    Mami Hino

    Mami Hino regularly advises leading pharmaceutical clients on patent litigation and transactions, with a particular emphasis on handling invalidity trials. Her work benefits from her extensive experience and background as a pharmacist.
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  • Hiroshi Kobayashi
    Hiroshi Kobayashi

    Hiroshi Kobayashi

    Hiroshi Kobayashi is a patent attorney admitted to practice intellectual property infringement litigation. He leverages over a decade of experience as patent counsel at major chemical and pharmaceutical companies to offer expert assistance on patent oppositions and enforcements.

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  • Shimako Kato
    Shimako Kato

    Shimako Kato

    Shimako Kato is sought after for her experience in patent-related disputes. Her background in material engineering enables her to represent clients in highly technical matters.

    • She has experience in patent prosecution as an examiner at the Japan Patent Office, so she has a high level of expertise in the field of patents.

      Intellectual Property: Domestic respondentAsia-Pacific
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  • Junichi Kitahara
    Junichi Kitahara

    Junichi Kitahara

    Junichi Kitahara is a well-known lawyer handling complex commercial disputes for both domestic and international clients. His practice covers the pharmaceutical and technology sectors.

    • He is a well-rounded and excellent lawyer in patent litigation.

      Intellectual Property: Domestic respondentAsia-Pacific
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  • Makoto Hattori
    Makoto Hattori

    Makoto Hattori

    Makoto Hattori is dual-qualified in Japan and New York and represents multinational corporates across a range of patent litigation.

    • He has very strong expertise in the field of intellectual property and I feel a high level of confidence every time I review his in-depth comments.

      Intellectual Property: Domestic respondentAsia-Pacific
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Ranked Individuals at Abe, Ikubo & Katayama (6)

Japan

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