Rio Kamei is an associate in the Corporate & Securities practice in Mayer Brown's Tokyo office and focuses on 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


  • Assisting a Japanese trading house in the formation of a joint venture with a Japanese food company and the acquisition by the joint venture of a US based food manufacturer.
  • Assisting a Japanese manufacturer in the carve out and sale of a business unit to a US based global manufacturer.
  • Assisting 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