Adventure
A civilian diving team is enlisted to search for a lost nuclear submarine and faces danger while encountering an alien aquatic species.
Iemitsu, Tokugawa Shogun III, hates his eldest son Takechiyo; all his love is given to his younger son Tokumatsu. One day, he orders Takechiyo to an initiation rite in Yedo (today's Tokio). Takechiyo lives far away under the surveillance of Hotta Masamori, head of the Skura clan, where he was also raised.