He served in the Provisional Government of the Republic of Korea, participated in the creation of Korea Democratic Party after Korea's liberation from Japanese colonial rule in 1945, and participated in the Left-Right Coalition Movement in Korean peninsula as the leader of the Korea Democratic Party, but was abandoned by the party and moved to the National Self-reliance Federation. After that, he participated in inter-Korean negotiations, but acknowledged failure and the establishment of the Korean government. He was elected running for the second National Assembly election on May 30, 1950, but was kidnapped by the People's Army during the Korean War.
In 1925, the Soviet Union sent Foreign Minister Lev. M. Karakhan to Japan's foreign minister, Bang Taek-kyum-gil, and signed a secret agreement with Japan to oust and arrest Korean nationalists, including Kim Kyu-sik and Cho Wan-koo, who were not moving as ordered by the Soviet Communist Party.[4] Won Sei-hoon was also forced out of the Soviet Union at that time.
Won Sehun was State Councilor of the Provisional Government.
On October 23, 1945, he expressed his support for Syngman Rhee at the National Council for the Promotion of Independence.
He became a member of the Anti-trust National Mobilization Committee, which was formed on December 30, after Kim Ku protested the Moscow Conference (1945) and pushed for a strong anti-trustee campaign.[5]
He was visited by Kim Yeon-soo, a businessman, in late 1945. While temporarily staying at the home of Na Yong-kyun, secretary-general of the Korea Democratic Party, Won asked him to take over the Kyungbang for a while, but Won did not receive the political funds he gave him. It is said that it was because of the time of Japanese militarism.[6]
On February 14, 1946, he was elected one of the 28 supreme political members of the Emergency National Congress.[7]
He was a member of the South Korean Transitional Legislation Committee.
On August 20, 1949, he was elected to the Standing Committee of the National Council for the Strengthening of the People's Republic of Korea.[8]
He ran for the second National Assembly in 1950 and was elected.
He was kidnapped to North Korea during the Korean War and served as a standing member and executive member of the Council for the Promotion of Peaceful Reunification of North Korea, but was purged in 1959 for international espionage and died on December 25 of the same year.
↑납북 제헌ㆍ2대 국회의원 현황 (in Korean). 2000-12-21. Archived from the original on 2005-09-10. Retrieved 2007-10-03. 원세훈씨는 재북평화통일촉진협의회 상임위원 겸 집행위원으로 있다가 지난 59년 국제간첩죄로 숙청당해 같은해 12월 25일 사망했다.
