In 2008, Kang joined a peace movement and in August 2008, staged a naked protest at the Armed Forces Day of South Korea.

Kang was enrolled in the Seoul National University school of law from March 2005 to 2007 but did not complete his studies.

From 11 August to 25 September 2004, Kang went on an hunger strike, receiving support from some teachers, civic groups and 32 congressmen.

This won religious rights for students and in taking legal action against his school and the government of Seoul Kang was compensated.

[2] On 14 September and 27 January 2011, Kang began periods of hunger strike of seven days to promote the rights of prisoners.