Nasu no Yoichi was one of the Genji warriors who was famous for his actions at the Battle of Yashima in 1185. Minamoto no Yoshitsune mounted a surprise attack against the Heike at Yashima on February 19, 1185. After a fierce battle lasted for hours, the Heike jumped into their boats and sailed off. A fair vessel parted from the Heike warships and stopped about 80 m from the beach when the sun was setting.. A beautiful court lady appeared from the cabin, and placed a fan atop the mast. She dared the Genji to knock it off.