Masahiro Matsuoka

Matsuoka entered Johnny and Associates when he was 12,^[3] after taking the application to the office himself, at around 10 or 11. His reason for entering the entertainment business was because he found his surroundings boring and wanted to do something different. That is when he saw Hikaru Genji. His mother was against it. He didn't even know where the office was located or its phone number, but found some information in the back of a magazine featuring the group. When he called the office, he was denied entry because they thought he was looking for a job at the office instead of entering as a fledgling artist. After passing the written test, he went to the auditions, being one of around 50. During that time, the "bad boy" style was trending, and he was part of it, having shaved his hair and eyebrows, which he had to paint on for the audition at TV Asahi. He was received by a man who, according to Matsuoka, "looked like a janitor getting the room ready". The man, as he later learned, was Johnny Kitagawa. Kitagawa called all the candidates, to start the audition, but when he called Matsuoka by "you", a word frequently used by Kitagawa, he complained, answering "I'm Matsuoka, so don't call me 'You'". He got the call for an interview the following day. Around a month after joining J&A, he was at a training camp, when someone called his name. Matsuoka identified himself, and the person said "Ah, it's you", turned around and left. It was the first time he met his senior Noriyuki Higashiyama.^[4]

In January 2026, it was reported that Matsuoka had established a company by the name of MMsun.^[3][5]

On February 13, 2026, after 30 years on the program, Matsuoka announced on his site that he was leaving The! Tetsuwan! Dash!! [ja]. On the post, he mentions having meeting Nippon Television's president and telling him about his decision. He also mentions being thankful of their support through the years, and that he will continue supporting those appearing in the program.^[6][7][8]

Matsuoka joined the pop/rock band Tokio as a drummer in 1990, although the band did not debut until 1994. Along with other Tokio members, he was a background dancer for idol bands such as Hikaru Genji. He remained with the group until its dissolution on June 25, 2025, following the report of member Taichi Kokubun's violation of compliance by Nippon Television. The group had an agent contract with Starto Entertainment, which ended by years end.^[9] As for Matsuoka, he decided not to renew any kind of contract with the agency after that.^[3]

Matsuoka has had parts in over 20 dramas. His acting debut was in the 1990 drama Aishiteru! Sensei [ja].^[10] His first lead role was in Psychometrer Eiji, a 1997 mystery science fiction drama. In 2008 he starred a comedy series Yasuko to Kenji, based on a comical manga by artist Aruko.

Matsuoka has endorsed many various brands with the band Tokio and by himself. With Tokio, he has endorsed among others Microsoft's Xbox 360 and Eneos, a brand for Nippon Oil.