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Masanori Tosu

Partner practicing Life Science, Pharmaceutical and Healthcare; Mergers and Acquisitions (M&A); Private Equity, Venture Capital and Startups; IP Transactions; Data Protection and Privacy; Global Investigations, Crisis Management and Compliance; General Corporate · Nagashima Ohno & Tsunematsu

JapanLife Science & Healthcare, Corporate / M&AJapanese, English

About

Partner at Nagashima Ohno & Tsunematsu based in Japan, advising on life sciences, pharmaceuticals and healthcare, M&A, private equity, venture capital, IP transactions, data protection, investigations and compliance, and general corporate matters. Admitted in Japan (2011) and New York (2018); served at the Ministry of Health, Labour and Welfare (2019–2021) and was a member of the review committee on the industrial structure for stable supply of generic drugs (2023–2024).

Practice areas

Life Science & HealthcareCorporate / M&APrivate EquityVenture CapitalStartupsIntellectual PropertyData Protection & PrivacyInvestigations & Compliance

Office

Expertise

Life SciencesPharmaceuticalsHealthcareGeneric Drugs SupplyMergers & AcquisitionsPrivate Equity & Venture CapitalIntellectual Property TransactionsData Protection & PrivacyGlobal Investigations & Compliance

Education

  • The University of Tokyo (LL.B., 2007)
  • Waseda Law School (J.D., 2010)
  • Duke University School of Law (LL.M., 2017)

Admissions

  • Japan (Daiichi Tokyo Bar Association, 2011-)
  • State of New York (2018)

Languages

JapaneseEnglish