Tax Disputes
South Korea
06 October 2025
Yoon & Yang LLC is particularly experienced in handling investigations initiated by the Ministry of Food and Drug Safety, The Regional Environment Agency, and the National Tax Service. All jointly leading the practice, Sun Bong Lee is well-placed to advise on clinical malpractice claims, Sang-Pil Lee, regularly advises both domestic and overseas construction companies and financial institutions, and Tae-Gu Zeon is an expert in financial disputes. Dong Gyu Lee often draws on his prosecutorial expertise, and Jin Seok Lee often handles cases involving tax law. Gyun Min Kim is well-versed in cases concerning breaches of trust, breaches of the Public Official Election Act, and work safety accidents.
Legal 500 Editorial commentary
Accolades
Client satisfaction
Key clients
- Kolon Life Science
- Daewon Pharmaceutical Co., Ltd
- Samsung Engineering Co
- Shinhan Bank
- Deutsche Securities Korea
- SK Innovation
- Hanssem
- Samsung Electronics Service
- Samsung C&T Corporation
- KEB Hana Bank
- KB Securities
Work highlights
Successfully defended Hana Bank and its employees against fraud charges related to the Optimus Fund scandal, achieving a complete acquittal and setting a precedent on the legal status of private fund trustees under the Capital Market Act.
Secured a not guilty verdict for KB Securities on charges of violating the Capital Market Act, emphasizing the company's structural inability to be aware of underlying asset insolvencies. This case protects securities company executives from similar future prosecutions.
Secured an acquittal for Kolon Life Science executives accused of fraud and regulatory violations in the development of Invossa, marking a significant step toward clearing suspicions and potentially reviving the osteoarthritis gene therapy.
Practice head
Sun Bong Lee; Sang-Pil Lee; Tae-Gu Zeon
Other key lawyers
Dong Gyu Lee; Jin Seok Lee; Gyun Min Kim