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Anderson Mori & Tomotsune

Work +81 3 6775 1000
Bangkok, Beijing, Ho Chi Minh City, Jakarta, Nagoya, Osaka and 3 more

Yasufumi Shiroyama

Work 81-3-6775-1038
Anderson Mori & Tomotsune

Work Department

Intellectual Property


Intellectual Property/Life Sciences/TMT, Competition/Antitrust, Dispute Resolution, Corporate Crisis Management


Admitted in Japan (1994)


  • Japanese (first language)
  • English


Dai-ichi Tokyo Bar Association (Japan), 1994, Patent Attorneys Association, AIPPI Japan, LES Japan, INTA


The University of Tokyo (LLB, 1992); University of California, Davis (LLM, 1998)

Japan: Intellectual property

Intellectual property – Independent local firms

Within: Leading individuals

Yasufumi Shiroyama - アンダーソン・毛利・友常法律事務所 ・ 安德森·毛利·友常律师事务所

Within: Intellectual property – Independent local firms

Anderson Mori & Tomotsune’s IP group specialises in the electronics, chemical, biotechnology and pharmaceutical sectors. The team benefits from its close cooperation with the firm's other departments, including the competition, labour, corporate, and cross-border transactional teams. Co-heading the group are Yoshikazu Iwase and Yasufumi Shiroyama, who are both experienced patent litigators, while Akihito Nakamachi specialises in cross-border IP and technology transactions. In a deal worth around JPY21bn, the team advised Taiyo Holdings on an asset purchase agreement regarding the IP rights of 13 long-term listed products produced and sold in Japan.

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Japan: TMT

TMT – Independent local firms

Within: TMT – Independent local firms

Anderson Mori & Tomotsune advises major clients including Dunlop Sports and Taiyo Holdings on matters across the full spectrum of the TMT sector. The group has particular expertise in drafting and negotiating contracts including services agreements, particularly those with a key focus on the Japanese legal market and its culture. Yasufumi Shiroyama jointly leads the practice with, Tsutomu Miyano, Atsushi Yamada, Yoshikazu Iwase and Akihito Nakamachi; Nakamachi recently acted for MedRx on a licence agreement with Cipla USA.

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Legal Developments in Japan

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • Taking control of a Japanese publicly listed company:

    Introductory notes for successfully completing an M&A
  • Yuasa and Hara Business Law News

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  • Japan: New legislative framework for Sukuk

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  • Yakult Bottle Acquired Distinctiveness

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  • Tax: Japan: International Joint Ventures

    Tax on international joint ventures. Country Q&A (Japan).
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  • Renewable energy takes off in Japan

    Like many other countries, Japan has decided to reform its renewable energy (RE) policy, to dramatically increase the use of renewable energy. The core policy mechanism is a feed-in tariff (FIT). This chapter summarises the contemplated Japanese FIT and its practical impact on existing and future investment in this sector, providing an overview of:
  • Licensing - 2010

    Q & A on Licensing in Japan 
  • Law on the Civil Jurisdiction of Japanese Courts over Foreign Countries, etc.

    The Law has been enacted to clarify the scope of application of the civil jurisdiction of Japanese courts over foreign countries, etc., and set exceptions to civil preocedings involving foreign countries, etc., based on the United Nations Convention on the Jurisdictional Immunities of States and their property (UN Convention on Immunities) (see Article 1).