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Asia-Pacific Guide
Individual Profile

Tatsuo Yamashima

Atsumi & Sakai - Tokyo

Tatsuo Yamashima - Atsumi & Sakai
  • Fukoku Seimei Building 12F
  • Tokyo, Tokyo-to, Japan
  • 100-0011

Profile submitted by Tatsuo Yamashima

Practice Areas

Mr. Yamashima has extensive experience in competition law, including cartels and mergers, and has represented many Japanese and foreign companies in cartel cases involving Japan, the EU, the US, and other countries in Asia, Oceania, Latin America and Africa. The competition matters he has advised on relate to, inter alia, IT devices, freight forwarding, power cables, the financial sector, auto-parts, international shipping. He also has significant experience with leniency applications in Japan.

Professional Memberships

Daini Tokyo Bar Association; Japan Competition Law Forum.


Admitted in Japan (2005).


Educated at The University of Tokyo (B.A., 2002; LL.M., 2004).