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Atsumi & Sakai

Work +81 3 5501 2111
Fax +81 3 5501 2211
London, Tokyo

Chie Kasahara

Work +81-(0)3-5501-2438
Atsumi & Sakai

Work Department

Finance, Corporate, International Practice


Partner (Intellectual Property Rights, Entertainment Law, Cross-Boarder Transactions, General Corporate Legal Affairs, TMT (Technology, Media and Telecommunications) and Finance (PFI)).


Hayabusa Kokusai Law Offices (2000 – 2006); Greenberg Traurig LLP (New York) (2006 – 2007); Partner, Hayabusa Asuka Law Offices (2007 – 2008).


Japanese and English.


Dai-ichi Tokyo Bar Association, IP Lawyers’ Network Japan, a director of  Entertainment Lawyers' Network Japan, Global Advertising Lawyers Alliance  (GALA), Lifesciences Asia-Pacific Network (LAN), Corporate Law Study Group of the Dai-ichi Tokyo Bar Association, Association Littéraire et Artistique Internationale, Director of Entertainment Lawyers Network Japan


Hokkaido University (LL.B., 1993); Hokkaido University, School of Law (LL.M., 1996); Legal Training and Research Institute of the Supreme Court of Japan.

Japan: Intellectual property

Intellectual property ‚Äď Independent local firms

Within: Intellectual property ‚Äď Independent local firms

The 'excellent‚Äô Atsumi & Sakai¬†provides ‚Äėdistinguished knowledge and experience‚Äô across the IP sector, acting in registration, protection, use and licensing of patent rights, copyrights and trade mark rights matters, as well as a broad range of emerging issues such as¬†IT-related matters.¬†Life sciences and technology specialist Chie Kasahara¬†co-heads the team known for its ‚Äėreliability and integrity‚Äô along with Kunihiro Sumida¬†and Ian S. Scott. Also noteworthy is Go Hashimoto, who experienced in dispute resolution and cross-border licensing transactions for pharmaceutical and high technology clients.

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Japan: TMT

TMT ‚Äď Independent local firms

Within: Leading individuals

Chie Kasahara - Atsumi & Sakai

Within: TMT ‚Äď Independent local firms

The ‚Äėprompt and responsive‚Äô Atsumi & Sakai¬†fields¬†experienced¬†domestic and international¬†lawyers, and¬†includes¬†an¬†innovation¬†practice¬†group¬†which focuses on the key emergent areas of¬†fintech, Internet of Things (IoT) and¬†artificial intelligence¬†(AI).¬†Yuri Suzuki, who heads the fintech team, is¬†assisting Mitsubishi UFJ Financial Group with the business plans, prototypes, alliances and roll out process¬†for the company‚Äôs Digital Accelerator Program, while the IoT and AI team is jointly led by Masataka Hayakawa, Hiroyuki Sanbe¬†and Takafumi Ochiai.¬†The ‚Äėapproachable, supportive and knowledgeable‚Äô Chie Kasahara¬†leads the TMT department, which also¬†handles¬†the¬†registration, protection, use and licensing of patents, model utility rights, design rights, copyrights and trade marks.

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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

    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 (‚Äúthe Minister‚ÄĚ), has published the Criminal Justice Bill 2011 (‚Äúthe Bill‚ÄĚ). The main purpose of the Bill is stated to be ‚Äú‚Ķto 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.‚ÄĚ
  • 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).