During the 12th century, there was a war in Japan called the Genpei War. Two clans disputed the reign of Emperor Antoku on the Imperial Throne. The war ended at the Battle of Dannoura, which saw a victory for the Minamoto (Genji) clan. The opposing side, the Taira Clan supported the Emperor who at the time was only eight years old. When it was clear that they lost the battle at sea, Antoku's grandmother took her Emperor grandson and threw themselves in the sea rather than to be captured.