Virgin Sniper (1997)

Original title: 好色くノ一忍法帖 ヴァージン・スナイパー 美少女妖魔伝

Toranaga is a good-for-nothing loser. However, he also happens to be the last remaining direct descendant of Shogun Tokugawa Ieyasu. When a mysterious ninja threatens Toranaga’s life, the great ninja Hattori Hanzo is hired to protect him. However, it seems that there are a bunch of female ninjas aching to have sex with Toranaga and take his sperm! Now Hanzo must fight for Toranaga’s most precious possession against the leader of the ninjas, Neneko, who bears a centuries-old grudge.