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Originally, the animation directing was swapped between Yasumi and Smart, along with other animators such as Frank Weiss; however, after Andrew Overtoom left the crew at the end of season 8, Tom Yasumi and Alan Smart became the core animation directors for season 9.
Tom Yasumi was born in Tokyo, Japan on August 20, 1965. He is an animation director best known for his work onSpongeBob SquarePants. He has been working on the show since it began in 1999.