| Nationality: | Traditional Japanese martial art |
| School: | Nen-ryū |
| Founder: | Sōma Shiro Yoshimoto (相馬 四郎 義元, fl. c.14th century) |
| Date Founded: | 1368 |
| Period Founded: | Nanboku-chō period (1336 - 1392) |
| Location: | modern day Nagano Prefecture |
| Headmaster: | None |
| Headquarters: | None |
| Ancestors: | None identified |
is a traditional (koryū) school of Japanese martial arts founded in 1368 CE by the samurai Sōma Shiro Yoshimoto (c.14th century) in modern-day Nagano Prefecture, where Yoshimoto is said to have taught only fourteen students until his death.[1]