[12] In April 2010, he joined the predecessor project of Boys and Men and became an early member who performed on stages and appeared at events.

He chose Kansai Johnny's Jr. because he wanted to improve his dance skills before he appear in public.

[18] In June 2015, he became an official supporter of TV Asahi's event "TV Asahi Roppongi Hills Summer Festival SUMMER STATION" and was selected as a member of Mr. King from the limited time unit, Mr. King vs Mr.

[20] In 2016, at the age of 19, he became the youngest chairperson of the Hakataza Theater in Fukuoka by starring in “Johnny’s Future World from Teigeki to Hakata.

[23] He made his CD debut on May 23 under Universal Music Japan as King & Prince with the theme song "Cinderella Girl.”[24] In October 2022, he played the lead role, Koshiro Kurosaki in "Kurosagi" and in December he won the 26th Nikkan Sports Drama Grand Prix Autumn Drama Best Actor Award.

[28] [29] Hirano was announced together with Jinguji as the new members of Hideaki Takizawa's new talent agency TOBE on 7 July 2023.