Tsuyoshi Isshiki

Partner

Tokyo Office

Tsuyoshi Isshiki

Partner

Tokyo Office

People

Tsuyoshi Isshiki primarily focuses on competition law, covering both merger control and cartel regulation. His tenure at the Japan Fair Trade Commission spanned 4 years, from 2010 to 2014, where he played a pivotal role in numerous high-profile cases, serving as the chief investigator at both the investigation bureau and the mergers and acquisition division.

Practice Areas

Languages

Japanese, English

Qualifications

2008(-2015), Japan (Tokyo Bar Association)
2016, Japan (Daini Tokyo Bar Association)

Practice Areas

Languages

Japanese, English

Qualifications

2008(-2015), Japan (Tokyo Bar Association)
2016, Japan (Daini Tokyo Bar Association)

Education/Professional Experience

2002: Chuo University (LL.B.)
2007: Chuo Law School (J.D.)
2008 - 2010: Law firm in Tokyo
2010 - 2012: Japan Fair Trade Commission (Investigation Bureau)
2012 - 2014: Japan Fair Trade Commission (Merger and Acquisition Division)
2014 - 2016: Secretariat of the Headquarters for the Promotion of Administrative Reform, Cabinet Secretariat
2016 -: Nagashima Ohno & Tsunematsu
2024 - present: Partner, Nagashima Ohno & Tsunematsu

Seminars

NO&T Seminars
January 23, 2019 (Wed) 13:30 - 16:00
Antitrust Law Seminar “The Amended Antimonopoly Act and Latest Practice Trends”

ADVANCE Corporate Law Seminar

Kaoru Hattori, Yoshitoshi Imoto, Yusuke Kaeriyama, Ryohei Tanaka, Tsuyoshi Isshiki

JP Tower Hall & Conference
- Antitrust and Competition
- Antitrust and Competition Law Advice

Tsuyoshi Isshiki

Tsuyoshi Isshiki

Education/Professional Experience

Seminars

Antitrust Law Seminar “The Amended Antimonopoly Act and Latest Practice Trends”

Publications

The International Comparative Legal Guide to: Merger Control 2025 – Chapter 17 Japan

Overview of Freelancer Protection Act

Topics

Announcing New Partners and Counsel of NO&T

Announcing New Partners and Counsel of NO&T

Tsuyoshi Isshiki joins Nagashima Ohno & Tsunematsu