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. He left the series after the production of Season 12.
Tom Yasumi was born in Tokyo, Japan on August 20, 1965. He is an animation director best known for his work on SpongeBob SquarePants.
His name can seen on a gravestone in a cemetery in the episode "Sandy's Rocket."
To date, "Help Wanted" and "The Legend of Boo-Kini Bottom" are the only episodes where he is not an animation director, only that he is a sheet timer for "Help Wanted" and animation timer for "The Legend of Boo-Kini Bottom" instead.