THAILAND
Laos
Myanmar
Bangkok Thailand
Cambodia
Vietnam
Trends and Developments Contributed by: Tokuhiro Matsunaga and Siriwan Nopareporn SCL Nishimura & Asahi Limited
SCL Nishimura & Asahi Limited has gone from pio - neering beginnings to regional leadership, and its Bangkok office exemplifies excellence, collaboration and cross-cultural insight into Thailand’s legal land - scape and beyond. In 2013, it became the first major Japanese law firm in Thailand, and its growth accel - erated in 2019 through an alliance with Siam City Law Group (SCL), one of Thailand’s leading firms. On 5 April 2021, the firm merged to form SCL Nishimura & Asahi Limited, strengthening its capabilities and its presence to meet diverse legal needs in Thailand
and across Asia. The firm now has more than 70 law - yers and professionals, and is one of the largest in - ternational law firms in Thailand. Teams specialise in corporate/M&A, energy, labour and employment, IP/ IT, real estate, dispute resolution, and tax. The Thai office works closely with other global offices to de - liver end-to-end solutions, from market entry and expansion to exits and cross-border challenges, en - suring comprehensive support for both local and in - ternational clients.
Authors
Tokuhiro Matsunaga is a partner at SCL Nishimura & Asahi Limited, specialising in corporate/M&A and competition law. He delivers practical solutions through extensive experience and expertise, and
Siriwan Nopareporn is a counsel at SCL Nishimura & Asahi, Bangkok, specialising in competition and antitrust law. She was named an “Associate to Watch” in Competition/ Antitrust by Chambers Asia-Pacific
manages numerous cross-border M&A transactions across Asia and beyond. Recently, Tokuhiro has focused on expanding the firm’s Thai legal practice, providing hands-on support to Japanese and international clients investing in Thailand. His experience includes complex antitrust cases, as well as investigations by the Japanese Fair Trade Commission and authorities in more than 15 countries. He also advises on corporate governance, shareholder activism, compliance, internal investigations and whistle-blowing, and has a precise understanding of client needs and optimal outcomes.
2025 and 2026, and is a pioneer in developing Thailand’s competition law practice. Siriwan advises domestic and international clients on complex competition matters, including merger control, abuse of dominant position, cartels and regulatory compliance. She plays a key role in shaping trade competition regulations, and regularly represents clients before the Trade Competition Commission of Thailand. Siriwan is also a distinguished speaker and part-time lecturer on competition law and contract negotiation.
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