Ryushin learned the martial arts and military sciences (Shinden Fujiwara Musō-ryū) handed down in his family from his grandfather Dōjitsu and Shingu-Bettō Ariie.
Ryushin mempelajari seni beladiri dan ilmu militer (Shinden Fujiwara Musō ryū) yang diturunkan ke keluarganya dari kakeknya Dōjitsu dan Shingu-Bettō Ariie.