Complex sentence: Goemon was enraged to find out that Hideyoshi was involved with Nobunaga's death, but then was interrupted by Hanzo, under the command of Tokugawa Ieyasu (Masatō Ibu), who had come for the scroll.
Split into simpler sentences: Goemon was enraged to find out that Hideyoshi was involved with Nobunaga's death, but then was interrupted by Hanzo. Under the command of Tokugawa Ieyasu (Masatō Ibu), Hanzo had come for the scroll.