Gang Il-sun chose Goh Pan-Lye as his successor, and after his passing his movement split into many different factions. In 1911, Goh Pan-Lye (Subu, literally “Head Lady,” although there were two "Subus" in Gang's circle), a female disciple, emerged as the leader of one of the largest factions, which eventually came under the control of Goh's male cousin, Cha Gyeong-Seok (1880-1936). Cha's branch, known as Bocheonism (Bocheob-gyo), according to some scholars "had more followers during the Japanese colonial period than any other religion, more than an estimated 6 million adherents." However, it declined quite rapidly. Goh had separated from Cha in 1919 and established her own organization, which in turn divided into several rival factions after her death. Kim Hyeong-Ryeol (1862-1932), another leading disciple of Gang Il-sun, originally supported Cha but left him in 1914 and established yet another branch with the help of Gang Il-sun's widow, Jeong. Again, this branch split into several independent groups. Ultimately, around one hundred different groups claiming the legacy of Gang Il-sun came into existence, although few of them survive to this day.