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Miis representing Sengoku and Katsuya Yamano in the WarioWare: Smooth Moves credits.
Toshio Sengoku is a producer at Intelligent Systems. He began his career at Nintendo as an uncredited programmer for Hogan's Alley. He went on to work on the original Metroid as a programmer, in which he was credited as GPZ Sengoku. Sengoku has also been credited as Yes Sengoku. He has not been involved with any subsequent Metroid games. Sengoku is now primarily in charge of the WarioWare and Pushmo series, and he produced Paper Mario: Color Splash.