Hiromasa Yonebayashi

, nicknamed , is a Japanese animator and director, formerly for Studio Ghibli. After his directorial debut with Studio Ghibli (The Secret World of Arrietty), he became the youngest director of a theatrical film produced by the studio. Jin-Roh: The Wolf Brigade (1998), in between animation My Neighbors the Yamadas (1999), in between animation Spirited Away (2001), key animation Mei and the Kittenbus (2003), animation director Mary and the Witch's Flower (2017), director, screenplay Modest Heroes (2018), director, screenplay The Boy and the Heron (2023), key animation

Television Serial Experiments Lain (1998), key animation Ghiblies (2000 special), key animation Monster (2004), key animation Welcome to the Ballroom (2017), key animation

Original video animations Nasu: A Migratory Bird with Suitcase (2007), key animation