AllMovie

The fourth installment of the legendary Japanese film series starring Ichikawa Raizo, Shinobi No Mono 4: Siege opens to find Tokugawa Ieyasu poised to rule all of Japan. Before Ieyasu can cement his reign, however, he will have to destroy the Toyotomi clan once and for all. The Toyotomi clan is currently besieged in Osaka castle, and Ieyasu's ninja are the only ones capable of penetrating the heavily guarded fortress. But as easily as Ieyasu's ninja can breach Osaka castle, Kirigakure Saizo and the remaining Toyotomi ninja can get out. Now, as the armies of samurai position themselves for battle, the fate of a nation hangs in the balance.