■ HIBIYA SOGO LAW OFFICES

Managing Partner : Toshiaki Tada (member to Daini Tokyo Bar Association)

Toranomon Daibiru-East 7F 702
Kasumigaseki 3-8-1 Chiyoda-ku, Tokyo
JAPAN 100-0013

TEL : +81 3-3501-9777
FAX : +81 3-3501-9786

■ Our Principles and Policy

Our firm has over 50 years of experience practicing law at the forefront of economic law, primarily focusing on the Antimonopoly Act. We handle a comprehensive range of domestic and international matters touching on antitrust law, including advisory services and case handling (administrative, criminal, and civil cases) related to Japan's Antimonopoly Act. We also handle international cartel cases and corporate merger matters, as well as cases and advisory services concerning U.S. antitrust law, EU competition law, and competition laws in East Asia and other regions.

In recognition of this track record, our firm has been ranked among the five Band 1 Leading Firms in the Competition Law category by Chambers Asia-Pacific since 2009. In addition to this, several of our attorneys have been listed individually in Band 1 and other categories, and in the Lexology Index (formerly Who’s Who Legal) : Japan 2025, four of our attorneys were selected among the 51 attorneys identified as “Individuals that are considered leaders in their field” in the Competition Law category.

Furthermore, our firm handles a wide range of matters beyond competition law, including litigation cases involving disputes between companies, bankruptcy administration and civil rehabilitation cases, as well as general civil disputes.
Leveraging our knowledge and experience cultivated over many years in economic law and various other fields, we aim to flexibly respond to new needs arising in the real world and be of service to you.