The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

Mori Hamada & Matsumoto

Work +81 3 6212 8330
Fax +81 3 6212 8230
Bangkok, Beijing, Fukuoka, Ho Chi Minh City, Osaka, Shanghai and 3 more

Tsuyoshi Ikeda

Work +81 3 6266 8766
Mori Hamada & Matsumoto

Work Department

Antitrust and Competition Law


Tsuyoshi (Yoshi) Ikeda regularly advises clients on all aspects of antitrust/competition issues, including cartels, merger filings, distribution issues both in domestic and international (multi-jurisdictional) cases. He has been representing multinational companies before the JFTC in international cartel and second phase review merger cases. Yoshi also advises on IP-related antitrust issues such as license and standardization, taking advantage of his experience as an investigator in the IP/IT Taskforce at the JFTC, Yoshi also has a wealth of experience in consumer protection issues such as misleading advertisements. Yoshi frequently serves as a speaker or moderator in international conferences, such as ICN and IBA.


admitted in Japan, 2003; New York and California, 2009; Worked for the Japan Fair Trade Commission (JFTC) (2005-07) (as an investigator and a staff attorney in charge of the implementation of the leniency program); Worked for IP Litigation Department of Kirkland & Ellis LLP (2007-08). Work as a part-time lecturer in Antitrust Law course at Kindai University (present).




NGA for ICN; IBA; ABA Antitrust Section


Kyoto University (LLB, 2002); University of California, Berkeley, School of Law (Boalt Hall) (LLM, 2008)

Japan: Antitrust and competition law

Independent local firms

Within: Independent local firms

Mori Hamada & Matsumoto has ‘one of the best antitrust teams in Japan’, which advised JX Holdings and Showa Shell Sekiyu on widely publicised acquisitions in the Japanese oil industry; the former acquired TonenGeneral Sekiyu, and Idemitsu Kosan acquired 31.3% of the shares of the latter. Hideki Utsunomiya and counsel Tsuyoshi Ikeda are ‘excellent antitrust lawyers’, as is Kenji Ito, who has ‘cool-headed pragmatism’ and acted for Mitsubishi Motors during Nissan’s acquisition of 34% of its shares. Hitachi and FamilyMart are other clients.

[back to top]

Back to index

Legal Developments by:
Mori Hamada & Matsumoto

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

    The Minister for Justice, Alan Shatter (“the Minister”), has published the Criminal Justice Bill 2011 (“the Bill”). The main purpose of the Bill is stated to be “…to amend the criminal law to improve certain procedural matters and strengthen Garda investigative powers. The intention is that such improvements will assist in reducing the delays associated with the investigation and prosecution of complex crime, in particular white collar crime.”
  • Japan: New legislative framework for Sukuk

    The new framework passed in May 2011 will provide a solid legal platform for issuing Sukuk Ijarah under Japanese law. NAOKI ISHIKAWA highlights key legal structures and tax treatment in respect of the anticipated Sukuk issuances in Japan.
  • Yakult Bottle Acquired Distinctiveness

    Do you know about Yakult's delicious lactic acid drink which is contained in a small bottle? Yakult's lactic acid drink (hereafter referred to as "Yakult drink") is the most famous lactic acid drink in Japan and today is also being sold in many countries around the world. When you are enjoying Yakult drink, please keep in mind the case mentioned below.
  • Tax: Japan: International Joint Ventures

    Tax on international joint ventures. Country Q&A (Japan).
  • Japan: Recent Developments in Practice and Law

    The successful closing of two Islamic fi nance transactions which was announced in July 2010 by Nomura Holdings have paved a concrete path for Japanese corporations to consider overseas Islamic fi nance markets for their fund raising activities. The fi rst transaction was in Asia for the issuance of Sukuk Ijarah and the second was in the Middle East for the establishment of a Commodity Murabahah facility (Nomura Deals).
  • 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: