Rintaro, pseudonym of Shigeyuki Hayashi, is a well-known anime director. He works frequently with the animation studio Madhouse (which he co-founded), though he is a freelance director not employed directly by any one studio. He is a founding member of the Japanese Animation Creators Association (JAniCA) labor group.

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Rintaro is a prominent Japanese anime director and co-founder of the animation studio Madhouse, known for his extensive work across science fiction and fantasy.
He is best known for directing acclaimed anime feature films and series such as Metropolis, Galaxy Express 999, and Neo Tokyo.
He is heavily associated with Madhouse, an anime studio he co-founded, as well as his early career work with Mushi Production.