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Japan chapter

Madoka Shimada, Takashi Nedachi and Miyu Harada co-authored the Japan chapter of Competition in Digital Markets 2024, published by Law Business Research.


島田 まどか

Madoka advises clients on various matters of competition law, including domestic and international cartels, bid-rigging, M&A transactions, investigations by the JFTC, leniency applications and general antitrust law compliance. She is especially active in cross-border transactions. She has represented clients in connection with investigations into various global cartels, involving air cargo, marine hoses, TFT-LCDs, airlines, and bearings, and also in various merger-control cases, including a vertical integration between semiconductor equipment manufacturers, and major global merger transactions in the chemical and pharmaceutical industries. She has particular strength and experience handling IT-industry mega deals. Madoka is also active in advising in the international trade area, in particular, government procurement and export control. In addition, she advises on laws preventing unfair competition, including trade secret cases. She served as lead counsel to Nippon Steel Corporation in multinational trade secret litigation against POSCO (a South Korean steel company), a landmark case in this area, and successfully negotiated a favorable settlement for her client. She was a member of the Subcommittee on Unfair Trade Policies and Measures of the Industrial Structure Council at the Ministry of Economy, Trade and Industry from 2013 to 2023.

根立 隆史


  • Counsel
  • Tokyo

Takashi advises in all areas of competition law, including Japanese merger control and compliance, as well as global merger control and investigation involving collaboration with local counsel. His practical advise is based in knowledge and experience garnered through practice in Japan and the EU including secondment to one of the leading firms in global competition law practice in Brussels and over a decade of employment with the Japan Fair Trade Commission.