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Kitaro's producer, Daiichi Nagatomi, also retired in April 2024, and Yuta Tanaka retired in February 2024.

According to Wikipedia, Daiichi Nagatomi joined Toei Animation in 2002 and met the retirement requirements after only 22 years at the company.

https://x.com/DaichiNagatomi/status/1782322375511658913