A masterwork sword by Kamakura period swordsmith Ryokai of the prestigious Yamashiro school was donated here in 1542 by warlord Ōuchi Yoshitaka. It's now a National Important Cultural Property.

Mononobe Jinja ist mit wichtigen Kulturgütern verbunden, darunter ein kulturell bedeutsames Schwert.

Emperor Jimmu's conquest of Yamato was aided by Umashimaji, who is enshrined here. His father's spirit sword, Futsu-no-mitama, is worshipped alongside him as one of the shrine's five kami.

The shrine was founded in 514 AD by order of Emperor Keitai at the foot of Mount Yaoyama, where the founder of the Mononobe clan is said to be buried in an ancient kofun tomb.