Hiro was born on January 25, 1994, the youngest son of Japanese singers
Masako Mori and
Shinichi Mori. He has two elder brothers, the eldest of whom is
Takahiro Moriuchi, the lead singer of the band
One Ok Rock and Tomohiro Moriuchi who works on
TV Tokyo. In April 2005, his parents divorced when he was 11.
Marriage Hiro announced his marriage to actress and model
Maika Yamamoto on October 13, 2024, through a post in his official social media account. ==Career==