Hirato was born in
Chiba Prefecture. He attended Chiba Prefectural Keikaku-dai High School, and then
Tokyo University of the Arts, where he graduated from the sculpture major. In 1998, he opened HIRATO ATELIER, after working as a part-time lecturer at
Chiba Institute of Technology from 1990 to 1998. He taught part-time at Tokyo University of the Arts from 1995 to 2001. In 2001 he became an assistant professor at the Joshibi University of Art and Design and was promoted to full professor in 2008. Since 2010, he's been the professor of Three-dimensional Art Department as well as the Director of Environmental Art Society. He has completed numerous sculptural works centered on metals. == Major public exhibition / group exhibition ==