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Toshiaki Takahashi represents domestic and international business companies and investment funds. He works on dispute resolution matters related to business transactions, torts, product liability, control of a company, real estate investment, and renewable energy, among others. Toshiaki notably gained an order to set aside an arbitral award from the Osaka High Court, which was the second case where a Japanese court set aside an arbitral award under the current Japanese Arbitration Act. In addition, he has substantial experience in drafting, reviewing, and negotiating contracts (including construction [EPC]), labor matters, and international arbitration.

Toshiaki studied at the National University of Singapore (2016-2017) and worked in the Firm's Singapore Office (2017-2018).

Toshiaki served a secondment at the Japanese arm of a major U.S. retail company, where he handled anticorruption matters, including negotiation of anticorruption clauses with business partners.

Prior to becoming a lawyer, Toshiaki worked at a major Japanese news agency as a staff writer.


  • Pharmaceutical company seeks over $1 billion in ICC arbitration related to licensing agreementJones Day represented a multinational pharmaceutical company seeking over $1 billion in royalties in a licensing agreement dispute related to the application of U.S. Supreme Court decisions in Brulotte and Kimble, among other claims.
  • MassMutual International sells 85.1 percent of MassMutual Japan to Nippon LifeJones Day advised MassMutual International LLC in its sale of 85.1 percent of the shares of MassMutual Japan, MassMutual's wholly-owned life insurance and wealth affiliate, to Nippon Life for JPY104.2 billion (approximately US$955 million).
  • TonenGeneral Sekiyu combines with JX GroupJones Day advised TonenGeneral Sekiyu K.K. in connection with the business integration with JX Group, which forms the largest oil refiner in Japan.
  • DENKA buys Neoprene polychloroprene business of DuPont™Jones Day advised Denki Kagaku Kogyo Kabushiki Kaisha (DENKA) in the purchase of the Neoprene polychloroprene business of DuPont™ by Denka Performance Elastomer LLC, a joint venture company owned 70 percent by DENKA and 30 percent by Mitsui & Co., Ltd.
  • Takeda Pharmaceutical undergoes investigation involving alleged misconduct relating to investigator-initiated sponsored study on hypertension medicineJones Day, as a third-party organization, conducted an investigation for Takeda Pharmaceutical Company Limited in a matter involving alleged misconduct relating to an investigator-initiated sponsored study on its hypertension medicine, known as Candesartan Antihypertensive Survival Evaluation in Japan (CASE-J).
  • Asia based airline obtains settlement in breach of contract lawsuit against Japanese aircraft parts supplierJones Day represented an Asia based airline in a lawsuit filed against a Japanese aircraft parts supplier, seeking compensation of damages caused by the supplier’s failure in delivering its products to the airline.
  • Cabot sells its Supermetals business for $400 millionJones Day advised Cabot Corporation in the $400 million sale of its Supermetals business to Global Advanced Metals.
  • Asia-wide distributor of cosmetics disputes wrongful termination of distributorship agreement with Japanese manufacturerJones Day is representing the distributor of a famous brand of Japanese cosmetics in arbitration proceedings against the Japanese manufacturer for wrongful termination of an exclusive distributorship agreement.
  • Speaking Engagements

    • June 25, 2018
      OCAJI Seminar - Navigating Payment Risks in Southeast Asia
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