Singanhoe
Uncompromising nationalists and socialists joined to found the Singanhoe, the largest legal national organization of the colonial period.
When a home-rule (autonomy) movement — national reformism seeking self-government within Japanese rule — arose in the mid-1920s with ideas such as Yi Gwang-su’s "National Policy" (1924), nationalists who rejected them and socialists suppressed under the Peace Preservation Law sought cooperation. After the socialist Jeonguhoe declared for alliance with nationalists in 1926, the Singanhoe was launched on 15 February 1927 with Yi Sang-jae as president and Hong Myeong-hui as vice-president. Its platform was "to awaken political and economic consciousness, strengthen unity and reject all opportunism". The women’s organization Geunuhoe was its sister body.
With some 140 branches and 40,000 members it held lectures and supported labour, peasant and student movements. During the 1929 Gwangju student movement it sent an investigation team and planned a mass rally, and many leaders were arrested. As the new leadership turned moderate and the Comintern changed line, socialists called for dissolution and it was dissolved in 1931.