Admitted
Lawyer admitted in Japan (Bengoshi) (2007)
Solicitor admitted in England & Wales (2018)
*Atsumi & Sakai is not regulated by the Solicitors Regulation Authority for England and Wales.
Bar Association
Dai-ichi Tokyo Bar Association
Education
Tohoku University (LL.B., 2003)
Tohoku University School of Law (J.D.., 2006)
The Legal Training and Research Institute of the Supreme Court of Japan
Nottingham Law School (Graduate Diploma in Law, 2014)
University of Law (London) (Legal Practice Course, 2015)
Tohoku University School of Law (J.D.., 2006)
The Legal Training and Research Institute of the Supreme Court of Japan
Nottingham Law School (Graduate Diploma in Law, 2014)
University of Law (London) (Legal Practice Course, 2015)
Background
Squire Gaikokuho Kyodo Jigyo Horitsu Jimusho (Tokyo Office of Squire Patton Boggs)(2008-2017)
Secondment with Squire Patton Boggs (Singapore) LLP (2016-2017)
CEDR Accredited Mediator (2019-)
Japan Commercial Arbitration Association (JCAA) registered arbitrator (2019-)
Japan Commercial Arbitration Association (JCAA) registered mediator (2019-)
Member of the Chartered Institute of Arbitrators (MCIArb) (2020-)
Founder of the Japan Chapter, Energy Related Arbitration Practitioners (ENERAP) (2021-)
Members
Japan Association of Arbitrators (JAA)
International Bar Association
Web Articles
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Panoramic - Energy Disputes 2025, Japan chapter, Law Business Research Ltd. (2025) [Co-author]
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“Enforcing arbitration awards in Japan,” Practical Law, Thomson Reuters (February 2025) [Co-author]
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The Legal 500: International Arbitration Country Comparative Guides, Japan chapter, Legalease Ltd. (2024) [Co-author]
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“Enforcement of Judgments: Overview (Japan),” Practical Law, Thomson Reuters (August 2024) [Co-author]
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Panoramic - Energy Disputes 2024, Japan chapter, Law Business Research Ltd. (2024) [Co-author]
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The Legal 500: International Arbitration Country Comparative Guides, Japan chapter, Legalease Ltd. (2023) [Co-author]
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Getting the Deal Through - Energy Disputes 2023, Japan chapter, Law Business Research Ltd. (2023) [Co-author]
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The Legal 500 Comparative Guides - Competition Litigation, Japan chapter, Legalease Ltd. (2022) [Co-author]
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“Enforcement of Arbitral Awards in Japan: Overview,” Practical Law, Thomson Reuters (September 2022) [Co-author]
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“Enforcement of Judgments in Japan: Overview,” Practical Law, Thomson Reuters (September 2022) [Co-author]
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The Legal 500: International Arbitration Country Comparative Guide, Japan chapter, Legalease Ltd. (2022) [Co-author]
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“GAR Know-How: Commercial Arbitration 2021 - Japan,” Global Arbitration Review (GAR), Law Business Research Limited (May 2021) [Co-author]
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The Legal 500: International Arbitration Country Comparative Guide, Japan chapter, Legalease Ltd. (2021) [Co-author]
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The Legal 500 Comparative Guides - Competition Litigation, Japan chapter, Legalease Ltd. (2021) [Co-author]
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“GAR Know-How: Commercial Arbitration 2020 - Japan,” Global Arbitration Review (GAR), Law Business Research Limited (May 2020) [Co-author]
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The Legal 500 Comparative Guides - Competition Litigation, Japan chapter, Legalease Ltd. (2020) [Co-author]
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The Legal 500 Comparative Guides - Competition Litigation, Japan chapter, Legalease Ltd. (2019) [Co-author]
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“GAR Know-How: Commercial Arbitration 2019 - Japan,” Global Arbitration Review (GAR), Law Business Research Limited (May 2019) [Co-author]
Seminars
- Panelist at the panel discussion entitled "Commercial Disputes in the Renewable Energy Sector", hosted by Energy Related Arbitration Practitioners (ENERAP), August 24, 2022
- Panelist at the panel discussion entitled "Japanese Parties and Energy Arbitration in Asia" at the webinar entitled "Japanese Parties and Trends in Energy Dispute Resolution", hosted by Energy Related Arbitration Practitioners (ENERAP), January 20, 2022
- Moot Judge at "16th LAWASIA International Moot Competition 2021", hosted by LAWASIA, October 21, 2021
- Panelist at the panel discussion entitled "International Arbitration: Regional Perspectives, ASIA", hosted by Shoosmiths LLP, July 7, 2021 (Webinar)
- Panelist at the panel discussion entitled "International mediation as an effective means of dispute resolution during the COVID-19", hosted by Atsumi & Sakai and Singapore International Mediation Centre (SIMC), December 2, 2020 (Webinar)
- Panelist at the panel discussion entitled "Competition Law in The Digital Age: Issues to Consider and Priorities for Enforcement & Damages", at the conference entitled "JAPAN: 6th Annual International Arbitration, Regulatory & Competition Law Global Summit", hosted by Wolters Kluwer and Legal Plus, September 12, 2019
- Moot Judge at "12th LAWASIA International Moot Competition 2017", hosted by LAWASIA, September 19, 2017
- The Legal 500 Asia Pacific 2025 Leading Individuals
- Dispute resolution
- Asian Legal Business (ALB) Japan Law Awards 2024
- Dispute Resolution Lawyer of the Year
- The Best Lawyers in Japan 2025
- Antitrust / Competition Law
- The Legal 500 Asia Pacific 2024 Leading Individuals
- Dispute resolution
- The Legal 500 Asia Pacific 2024 Next generation partners
- Risk management and investigations
- The Best Lawyers in Japan 2024
- Antitrust / Competition Law
- The Legal 500 Asia Pacific 2023 Leading Individuals
- Dispute resolution
- The Legal 500 Asia Pacific 2023 Next generation partners
- Risk management and investigations
- The Best Lawyers in Japan 2023
- Antitrust / Competition Law
- The Legal 500 Asia Pacific 2022 Next generation partners
- Risk management and investigations
- The Best Lawyers in Japan 2022
- Antitrust / Competition Law
- The Legal 500 Asia Pacific 2021 Next Generation lawyers
- Risk management and investigations
- The Best Lawyers in Japan 2021
- Antitrust / Competition Law
- The Legal 500 Asia Pacific 2020 Next Generation lawyers
- Risk management and investigations
- asialaw Leading Lawyers 2020
Notable practitioner- Competition/antitrust
- The Legal 500 Asia Pacific 2019 Next Generation Lawyers
- Risk management and investigations