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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

Gaku Ishiwata

Work +81 3 5223 7753
Mori Hamada & Matsumoto


M&A, securities, private equity funds and general corporate.


Mori Hamada & Matsumoto since 1997 (partner of firm since 2005); Davis Polk & Wardwell, New York (2001-2002); and Lecturer, Kyoto University Law School since 2007.




Member of Dai-ni Tokyo Bar Association; Member of New York State Bar Association; Member of Inter-Pacific Bar Association (IPBA); Member of Committee for the Study of Tax Framework for Corporate Acquisitions, Divisions and Other Corporate Reorganizations organized by the Ministry of Economy, Trade and Industry (2004-2006); Member of Committee for the Study of Japanese LLP organized by the Ministry of Economy, Trade and Industry (2004-2005); Member of the Corporate Value Study Group organized by the Ministry of Economy, Trade and Industry (2004-); Member of the First Subcommittee of Sectional Committee on Financial System of Financial System Counsil (2005-2006); Member of Liaison Conference on Corporate Governance, organized by Financial Services Agency (2010-2011); and Member of Disclosure System Working Group organised by Financial Services Agency (2011).


Graduated from The University of Tokyo (LLB, 1995) and the University of Chicago (LLM, 2001). Admitted in Japan, 1997; New York, 2002.

Japan: Corporate and M&A

Corporate and M&A – Independent local firms

Within: Leading individuals

Gaku Ishiwata (Bengoshi) - Mori Hamada & Matsumoto

Within: Corporate and M&A – Independent local firms

The corporate practice at Mori Hamada & Matsumoto covers the full gamut of mandates and represents a client roster that includes blue-chip industrials, banks, financial institutions and private equity funds. Gaku Ishiwata and Shuhei Uchida recently acted for Asatsu DK in its acquisition by Bain Capital, and Naoya Shiota was part of the group which advised KKR on its acquisition of Calsonic Kansei and the subsequent squeeze-out procedure. Satoko Kuwabara  – who co-heads the practice with Ishiwata – and Takane Hori teamed up with Uchida to advise cryptocurrency exchange operator Coincheck on its sale to Manex, as well as the negotiation of possible transactions schemes, such as an earn-out mechanism (this follows Manex’s role as sponsor in a business improvement order imposed on Coincheck by the FSA). Other key senior names include Hajime Tanahashi, Tomohiro Tsuchiya and Atsushi Oishi. Among the team's impressive client list names such as SoftBank, Hitachi and Nomura also feature.

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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
  • Yuasa and Hara Business Law News

    Contents of the Issue Law on liability for breach of contract Review on the amendment to the cabinet office order on Corporate Disclosure

    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:
  • 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).