 One prominent leader was Kuniaki Koiso, future Prime Minister of Japan.Members of the Sakurakai held meetings in a dojo led by Aikido founder Morihei Ueshiba at the headquarters of the Oomoto religion in Ayabe.Twice in 1931 (the March Incident and the Imperial Colors Incident), the "Sakurakai" and civilian ultranationalist elements attempted to overthrow the government.