Hideto Ishida is a partner at Anderson Mōri & Tomotsune, and counsels a variety of domestic and foreign multinational companies in Japanese competition and distribution matters, including those relating to mergers and acquisitions, joint ventures, distribution agreements, and other anti-trust related agreements. He also represents many domestic and foreign companies in investigations before the Japan Fair Trade Commission and other anti-trust foreign authorities involving price cartels, bid rigging and similar serious alleged violations such as some bond, Foreign Exchange, LIBOR/TIBOR, Auto Parts, Maritime Transportation, LCD, Marine Hose, GIS international cartel cases. He served for seven years as the first attorney appointed as a special investigator with the Japanese Fair Trade Commission and thus has a keen sense of the actual and practical application of antitrust and distribution regulations to companies doing business in Japan.

He also writes many English or Japanese articles and was appointed as Professor and Lecturer at the Faculty of Law, Tokyo University (1995–1999), and the Faculty of Law, Hitotsubashi University (2003–2011). He was a graduate from Tokyo University (LLB, 1976), and Harvard Law School (LLM, 1989).