Tsar & Tsai Law Firm

Tsar & Tsai Law Firm is a top-tier full-service law firm in Taiwan. The firm has more than 80 professional fee earners specialising in various legal fields. The firm has a long history of international practice and is known for its superior-quality work. It has maintained a diverse international character and prides itself on providing creative problem solving and strategic advice to clients.

The firm has been broadly recognised in publications and by various international institutions – including Chambers Asia, Chambers Global, the Legal 500, the International Financial Law Review, Asia Legal Business, Asialaw Profiles and China Law Profiles – as one of the best law firms in Taiwan. Tsar & Tsai is a full-service law firm and has decades of experience handling matters relating to foreign investment, general corporate, mergers and acquisitions, intellectual property, antitrust law, merger control filing, employment, criminal defence and dispute resolution.

International experience

Tsar & Tsai maintains close working relationships with leading law firms in most key jurisdictions around the world. It is also a member of Lex Mundi – the world’s leading association of independent law firms, with 160 members around the world. Clients are assured that they are in good hands whenever cross-border legal services are required.

Specialty areas

Based in Taiwan for more than 50 years, Tsar & Tsai is a commanding presence in the Taiwanese patent litigation scene. With a bursting bench of dedicated IP professionals, it cuts no corners to secure the best results for clients. Although best known for its contentious work, it also boasts a large cadre of technically proficient prosecutors, so is a smart option for those seeking not only to enforce existing rights, but also to procure new ones. Managing Partner Jennifer Lin has over three decades of experiences under her belt; she has amassed broad knowledge of IP, antitrust and corporate law, which she leverages to great effect around the negotiating table and in the courtroom. Joyce Ho and Jeanne Wang steer the IP group with confidence and poise. Both counsels are touchstone lawyers for key players in the high-tech world and assist in a diverse range of endeavours. Ms Lin, Ms Ho and Ms Wang are thought leaders who are regularly called on to represent government agencies.


English, Japanese, Mandarin

Notable cases

  • Assisted the Taiwan government (Department of Health) in obtaining an unprecedented compulsory licence for a pharmaceutical patent to combat the avian influenza crisis (pro bono).
  • Represented the Taiwan CD-R industry in successfully challenging the patent pool of Philips, Sony and Taiyo Yuden before the Fair Trade Commission, leading to the establishment of regulatory guidelines for patent licensing.

Competitive edge

Tsar & Tsai’s IP practice has been broadly recognised by organisations as one of the best in Taiwan. With decades of experience handling matters relating to patents, trademarks, copyright, unfair competition and trade secrets on behalf of foreign and local clients, the comprehensive scope of the firm’s IP practice includes litigation of infringement claims, administrative prosecution relating to trademark and patent applications, and anti-counterfeiting actions. In the firm’s patent group, most patent attorneys and engineers have over 10 years’ experience, and many patent attorneys and engineers possess both legal and technical backgrounds.

Work areas

The firm offers a broad range of legal services in the fields of:

  • antitrust and competition;
  • capital markets;
  • competition law and transactions;
  • corporate and financial law;
  • dispute resolution;
  • criminal defence;
  • employment and labour relations;
  • estate planning, wills and trusts;
  • foreign investment;
  • insurance;
  • intellectual property;
  • mergers and acquisitions;
  • projects and energy;
  • tax;
  • technology, media and telecommunications; and
  • data privacy protection.

Contact details

Tsar & Tsai Law Firm
Eighth Floor 245 DunHwa S Road
Section 1
Taipei 106

Professional contacts

Other offices

  • Hsinchu

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