The Trilateral Cooperation Secretariat (TCS) is an international organization established with a vision to promote "Lasting Peace, Common Prosperity, and Shared Culture" among China, Japan, and South Korea.

The idea of a trilateral framework between China, Japan and the Republic of Korea has its roots in the breakfasts attended by the three leaders at the sidelines of the 1999 ASEAN+3 Summit in Manila.

[4] Hence, in 2008, what began as a side-conference to the ASEAN meetings officially developed into the first China-Japan-South Korea Trilateral Summit, held in Fukuoka, Japan.

[9] The Consultative Board, the executive decision-making body of the organization, is composed of a secretary-general (SG) and two deputy secretaries-general (DSG).

Under the mission of promoting "Lasting Peace, Common Prosperity, and Shared Culture," the TCS aims to serve as a hub for the Trilateral Cooperation that encompasses a broad spectrum of sectors and actors.