Yasufumi Shiroyama > Anderson Mori & Tomotsune > Tokyo, Japan > Lawyer Profile

Anderson Mori & Tomotsune
Otemachi Park Building
1-1-1 Otemachi, Chiyoda-ku
TOKYO 107-0051

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)

Lawyer Rankings

Japan > Intellectual property: Independent local firms

(Hall of Fame)

Yasufumi ShiroyamaAnderson Mori & Tomotsune

Anderson Mori & Tomotsune‘s intellectual property department contains both bengoshi and dedicated benrishi, with experience across patents, trademarks and copyright law. The team handles high value multijurisdictional matters for high-profile clients, with significant experience in both disputes and transactional matters. This includes broad sector expertise, with proficiency across the chemical, pharmaceutical, automotive and technology industries. Yasufumi Shiroyama heads the practice, co-leading the team alongside a diverse team of IP experts. These include Yoshikazu Iwase, who has litigation expertise across patent infringement and revocation suits, Akihito Nakamachi, who is dual US (New York and California) and Japan qualified, and is particularly focused on the technology sector, and Wataru Shimizu, whose broad practice includes industry-university cooperation and intellectual property management. Also co-leading are Miki Goto, who covers patents, licensing, trade secrets, and trademarks, Masayuki Yamanouchi, who specialises in the pharmaceutical sector, and Nobuto Shirane, who handles patent litigation and licensing.

Japan > TMT: Independent local firms

Anderson Mori & Tomotsune advises TMT clients in a broad range of areas, including M&A, finance, regulatory matters, antitrust and corporate law. The department has particular expertise in intellectual property, handling both contentious and non-contentious matters in this area for high-profile clients. Core team members include Yoshikazu Iwase, who specialises in IP litigation, Akihito Nakamachi, who focuses on IP transactions for clients in the technology sector, and Miki Goto, whose experience covers patents, licensing, trade secrets and trademarks. Also key to the team are Yasufumi Shiroyama, Masayuki Yamanouchi, Nobuto Shirane, and Wataru Shimizu.