[3] Kang served as chair of the central committee of the Korean Christian Federation (KCF) starting in February 1989, vice-president of the Korean Council of Religionists [nl] starting in May 1989, and chair of the KCF central committee in May 1990.

Starting in July 1991, he served as vice-president of the DPRK-Japan Friendship Association, and as a member of the central committee of the Democratic Front for the Reunification of the Fatherland.

He became vice-chair of the PKAR in August 1993, and served as deputy chair of the North Korean committee for implementation of the June 15th North–South Joint Declaration.

He was a member of the national mourning committees for the deaths of Kim Il Sung in 1994, Ri In-mo in 2007, and Pak Song-chol in 2008.

Kang was awarded the Order of Kim Il Sung in March 2002, and the National Reunification Prize in September 2003.