If I remember correctly, in Japanese mythology Kushinada (Kushi Inada Hime), and also a deity, is the last of the 8 daughters that were offered to Orochi (8 headed serpent) to save a certain village. At this time, Susanoo was banished and wandering around the world. He decided to help this village and by tricking Orochi to drink strong sake and get intoxicated, he was able to defeat all of the heads and rescue her. And from Orochi's tail he got the Kusanagi (Grass-Parting) no Tsurugi (sword/blade).