Kogitsunemaru

Kogitsunemaru was forged by Sanjou Munechika at Fushimi. Before forging the sword, Munechika is said to have met a mysterious boy near the Fushimi Inari gate who was believed to be the fox deity Inari; the boy helped with seemingly inhuman skill. Munechika named the resulting masterwork "Kogitsune-maru," or little fox, in honor of that assistance.