In 1568, Jukei-ni dies and the Imagawa enter a major crisis again and a year later Ujizane surrender to the Ieyasu's Matsudaira clan. Ieyasu led a siege to Hikuma castle and capture it from Otazu no kata. Naotora is said to have participated actively in this battle to avenge her great grandfather's death, but it is probably a tale from the Edo period.