Japanese law firm Nishimura & Asahi has announced plans to open offices in Myanmar and Thailand.

Nishimura said in a statement that it will launch in Yangon and Bangkok in May and July, respectively. Associate Yusuke Yukawa will serve as the firm’s representative in Yangon, while associate Hideshi Obara will be its representative in Bangkok.

The firm did not say if it planned to hire local lawyers as well.

The 490-lawyer Japanese firm, one of Tokyo’s Big Four corporate law firms, is perhaps the most well-known firm to date to have announced plans for newly opened Myanmar. Korean law firm Jipyong Jisung opened an office in Yangon in March.

Though many international law firms have expressed interest in the country, which is believed to have substantial energy and mineral resources, many say they are holding off opening offices there until the regulatory environment has taken clearer shape.

Japanese firms have recently been expanding aggressively in Southeast Asia, driven by Japanese investment in the region. Nishimura and the other Big Four firms — Anderson Mori & Tomotsune, Mori Hamada & Matsumoto, and Nagashima Ohno & Tsunematsu — all opened offices in Singapore last year.

Nishimura also has offices in Hanoi, Ho Chi Minh City and Beijing.