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Tomonori Sawada is the sound director of Sonic Riders. He did all the sound effects in the game, and composed some of the music. He was also the sound director of Sonic Riders: Zero Gravity. Additionally, he helped compose the music used in Under Ground Zone for Sonic the Hedgehog 2 (8-bit version), under the pseudonym "Dawasa". Most recently, he supplied all the sound effects used in Sonic Lost World.