Complex sentence: He founded the Usui Reiki Ryoho Gakkai and initiated various students into Reiki Masters, most of them came from the Japanese Armed Forces, among them his successor Dr. Chujiro Hayashi.
Split into simpler sentences: He founded the Usui Reiki Ryoho Gakkai and initiated various students into Reiki Masters. Most of these students came from the Japanese Armed Forces, among them his successor Dr. Chujiro Hayashi.