 In reality however he has been recaptured and secretly held prisoner by the Sunrise Society, which subjected him to human cloning experiments to create an army of invincible super-soldiers.In the final confrontation of the series the Shadowmasters storm the Umezu's research facility to kill him and destroy his army of clones, but Shigeru dies too.The Shadowmasters indirectly came into contact with the Punisher (Frank Castle) when Kathryn Yakamoto (daughter of the elderly ninja master Hatsu Yakamoto from the Hokkaido-based Yakamoto clan teaching the young Shadowmasters) incognito helped him as a mysterious female ninja when he went to infiltrate a suspicious survivalist "ninja training camp" run by a shady American group.