Rio Kamei is an associate in the Corporate & Securities practice in Mayer Brown's Tokyo office and focuses on a wide variety of cross-border transactions including funds, fund formation and other corporate matters. Prior to joining Mayer Brown, Rio worked at another international law firm in Tokyo.

Spoken Languages

  • Japanese
  • English


  • Various Japanese institutional investors in their investments in overseas funds.
  • A Japanese trading house in its formation of a joint venture with a Japanese food company and the acquisition by the joint venture of a US based food manufacturer.
  • A Japanese manufacturer in the carve out and sale of a business unit to a US based global manufacturer.
  • A Japanese company on the establishment of numerous US subsidiaries and the formation of US fund vehicles.


University of Arizona, JD

Doshisha University, LLB


  • New York