The new office, which will open July 1, will be the Japanese firm's third domestic branch.
The Japanese law firm said it will open Yangon and Bangkok offices in May and July, respectively.
Kenji Taneda was previously a special counsel with Sullivan & Cromwell.
The Japanese firm is planning to open offices in Singapore, Shanghai, and Nagoya.
The private equity giant bought the company three years ago for less than half the sale price.
David Case was previously a partner in the Tokyo office of White & Case.
The Japanese government is selling part of its stake in Japan Tobacco, a former state monopoly and the world's third largest cigarette maker, to fund reconstruction associated with the March 2011 earthquake and tsunami.
Toyota says its problems with sudden unintended acceleration are in the rearview mirror, but newly disclosed documents raise questions that experts say have not yet been answered.
A strong yen helped fuel a record volume of overseas acquisitions by Japanese companies last year. But what happens now that the Japanese government is pushing for a weaker currency?
For international firms, China has generally been a tale of two cities: Beijing and Shanghai. But a number of firms are starting to eye second-tier markets like Chongqing, Dalian, Guangzhou, Shenzhen and Qingdao.