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Atsumi & Sakai
Tatsuo Yamashima
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Tatsuo Yamashima

Senior Partner

Main Practices
Labor and Employment Law / Labor and Employment Compliance / Termination of Employment / Labor Disputes / Labor Unions / M&A, etc. Labor Issues / HR System Reforms / Harassment and Misconduct / Offshore Employment and Labor Laws / Employee Data Privacy / Directors and Officers / Social and Labor Insurance; Visas / Labor Authorities / Merger Control (Domestic and International) / Cartels, Bid Rigging, and Leniency / Japan Fair Trade Commission Investigations and Inquiries / Antitrust Litigation (Domestic) / Antitrust Compliance and Investigations / Vertical Restraints and Abuse of Superior Bargaining Position / Subcontracting and Misrepresentations / Antitrust Investigations (Overseas) / Antitrust Private Enforcement (Overseas) / Corporate Governance / General Corporate Legal Affairs
Languages
Japanese / English
Office
Tokyo
Contact

Overview

Publications & Seminars

Awards

Admitted

Japan (2005)

Bar Association

Daini Tokyo Bar Association

Education

The University of Tokyo (B.A., 2002)
The University of Tokyo, School of Law (J.D., 2004)
The Legal Training and Research Institute of Supreme Court of Japan

Background

Anderson Mori & Tomotsune (2005-2012)
Norton Rose LLP (Brussels) (July-December 2011)

Member

Management Lawyers Council
Competition Law Forum
The European Union Studies Association- Japan
Verdi Society of Japan (Managing Director)
Association for Promotion of Opera Arts (Representative)

Publications

  • Exiting Executives, Japan Chapter, Shoosmiths LLP (2024) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2019, Japan Chapter, Global Competition Review (2019) [Co-author]
  • “Merger Control 2019: Japan,” IFLR April/May 2019, IFLR (2019) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2018, Japan Chapter, Global Competition Review (2018) [Co-author]
  • Merger Control: International Series 3rd Edition, Japan Chapter, Thomson Reuters (2017) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2017, Japan Chapter, Global Competition Review (2017) [Co-author]
  • IFLR Merger Control & Antitrust Regimes Survey 2017, Japan Chapter, International Financial Law Review (2016) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2016, Japan Chapter, Global Competition Review (2016) [Co-author]
  • “Review of Ten Years of Leniency Programs in Japan From the Practitioner’s Eye,” Kousei Torihiki No.787, Kousei Torihiki Kyoukai/Fair Trade Institute (May, 2016)
  • “Recent Trends in Cartel Enforcement in South Africa,” Kousei Torihiki No. 780, Kousei Torihiki Kyoukai/Fair Trade Institute (October, 2015)
  • The Handbook of Competition Enforcement Agencies 2015, Japan Chapter, Global Competition Review (2015) [Co-author]
  • IFLR Merger Control & Antitrust Regimes Survey 2015, Japan Chapter, International Financial Law Review (2015) [Co-author]
  • Chambers Legal Practice Guides - Cartels 2015, Japan Chapter, Chambers & Partners Publishing (2015) [Co-author]
  • “Monthly Domestic Letter,” Kousei Torihiki No. 773, Kousei Torihiki Kyoukai/Fair Trade Institute (March, 2015)
  • “Case Bulletin of Japanese Antimonopoly Act – Restriction on ticket sales by the trade association of ski lift operators (the JFTC announcement of February 19, 2014),” JURIST No. 1470, Yuhikaku Publishing Co., Ltd. (August, 2014)
  • For Practical Use: Selected Decisions Related to Fair Trade (Selected Decisions Series No. 5 - JURIST Special Issue), Yuhikaku Publishing Co., Ltd. (July, 2014) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2014, Japan Chapter, Global Competition Review (2014) [Co-author]
  • Merger Control: Jurisdictional Comparisons, Second edition 2014, Japan Chapter, Thomson Reuters (2014) [Co-author]
  • The Handbook of Competition Enforcement Agencies 2013, Japan Chapter, Global Competition Review (2013) [Co-author]
  • “How are International Cartel Cases detected?”, The Lawyers, ILS Publications, Inc. (October, 2012)
  • The Merger Control Review, Third Edition, Japan Chapter, Law Business Research Ltd. (2012) [Co-author]
  • “Newest Practice of Chinese Anti-Monopoly Law ~Promulgation of Chinese Leniency~”, The Lawyers, ILS Publications, Inc. (February, 2011) [Co-author]
  • “Non-Assertion of Patents Clause in License Agreements and the Japanese Anti- Monopoly Law”, INTELLECTUAL PROPERTY MANAGEMENT, Japan Intellectual Property Association (June, 2010) [Co-author]
  • Public Procurement, Japan Chapter, Global Competition Review (2010) [Co-author]
  • “Discovering a Violation - The Process and Risk Judgments Involved in Leniency Applications”, BUSINESS LAW JOURNAL, LexisNexis Japan (June, 2009) [Co-author]
  • “Impact on Labor Policy of the Enactment of the Labor Contract Law in the Peoples Republic of China, Part 1,” Lexis Kigyo Homu (October, 2007) [Co-author]
  • “Impact on Labor Policy of the Enactment of the Labor Contract Law in the Peoples Republic of China, Part 2,” Lexis Kigyo Homu (November, 2007) [Co-author]

Web Articles

Seminars

  • “Strategies for Approaching Remote Work Across National Borders,” hosted by BUSINESS LAWYERS, May 6, 2021-June 25, 2021
  • “Strategies during the New Normal for Legal Affairs, HR, and Compliance: Creating Organizations that Contribute to Creation of Corporate Value and Ways to Effectively Utilize Law Firms,” at a webinar entitled “Catch up with the New Legal Trends! LexisNexis Online Seminar, Vol.1,” hosted by LexisNexis Japan, October 29, 2020
  • Speaker at the webinar entitled “Your essential workforce law update in Asia Pacific!,” hosted by L&E Global, April 20, 2020
  • Speaker at the webinar entitled “Global Me Too: Focus on new developments in Asia,” hosted by L&E Global, March 23, 2020
  • “One year until the amended law comes into force! Dealing with the 2020 amended Civil Code: Things you should know now and hints for establishing a contract consulting system,” hosted by Corporate Management Forums, Inc., April 25, 2019
  • “Competition Law of South Africa,” at a seminar on competition laws of developing countries, organized by Kousei Torihiki Kyoukai/Fair Trade Institute, January 11, 2019
  • “Building a Foundation for Strengthening Legal Functions through Civil Code Amendment Measures: “Offensive” Civil Code Amendment Measures and a Task List and Road Map,” hosted by Keiei Chousa Kenkyukai, November 16, 2018
  • “Building a Foundation for Strengthening Legal Functions through Civil Code Amendment Measures: “Offensive” Civil Code Amendment Measures and a Task List and Road Map,” hosted by Keiei Chousa Kenkyukai, July 13, 2018
  • “[Amendment of the Civil Code for Sole Legal Staff] Overview of Amendments and Project Management,” hosted by BUSINESS LAWYERS, April 25, 2018
  • “Competition Laws of South Africa and Russia,” at a seminar on competition laws of developing countries, organized by Kousei Torihiki Kyoukai/Fair Trade Institute, February 23, 2018
  • “Project Management: Amendments to the Civil Code and Practical Tips – What? When? How? Solutions Meeting Your Company's Situation and Needs,” hosted by the Business Research Institute, February 15, 2018
  • “Competition Law of Germany,” at a seminar on competition laws of the United States and EU, organized by Kousei Torihiki Kyoukai/Fair Trade Institute, September 16, 2016
  • “Competition Law of South Africa,” at a seminar on competition laws of emerging markets, organized by Kousei Torihiki Kyoukai/Fair Trade Institute, January 29, 2016
  • “Cartel Enforcement in South Africa,” at the Workshop on Competition Laws of Foreign Countries, hosted by Kousei Torihiki Kyoukai/Fair Trade Institute, March 23, 2015
  • “International Cartel Cases: The Latest Trends,” hosted by Rikkyo University Law School, July 1, 2014