Battle of Anegawa
The name ("Daihannya") refers to the Daihannya sutra, made by Junkei Nagamitsu. The sword is in the possession of Oda Nobunaga who gave it to Tokugawa Ieyasu at the Battle of Anegawa, who then gave it to Okudaira Sadamasa at the Battle of Nagashino. The value of the sword during the Muromachi period, 600 kan, was associated with the sutra's 600 volumes; said to have belonged to the Ashikaga clan.