He enrolled in a higher grade at a private high school and lived with his father so he was not financially dependent on his mother's new husband.
Tashiro was reportedly involved in fights, motorcycle-gang activity, partying at discotheques, and going girl-hunting daily in high school, and was arrested for assault.
He was taken in by Chanels member Hiroyuki Kuboki and worked as a clerk at the same gas station, living in the company dormitory for two years.
They finished first place on the Japanese television program Ginza Now (ギンザNOW) and won a prize in a music contest sponsored by Yamaha.
They broke up in 1986 after leader Suzuki released a solo single, "The Summer Disappeared Over the Glass" (ガラス越しに消えた夏, Garasu goshi ni kieta natsu).
After Rats & Star broke up, Tashiro's comedic ability was discovered by Drifters member Ken Shimura and he became a television comedian.
As a comedian, he was nicknamed the "King of puns" (ダジャレの帝王, Dajare no Teiō) and "Genius of props" (小道具の天才, Kodōgu no Tensai).
On July 10, 1988, Tashiro opened a tarento shop called "Marcy's" (マーシーズ) (after his nickname) on Takeshita Street in Shibuya, Tokyo.
On September 24, 2000, Tashiro was referred to prosecutors for videotaping up a woman's skirt with a camcorder in the Tōkyū Tōyoko Line's Toritsu-daigaku Station in Meguro, Tokyo.
While he was barred, Tashiro did volunteer work such as carrying the wash and serving meals in a nursing home three days a week.
(もう1度だけ田代まさしを、よろしくお願い致します)[4] In July 2001, Tashiro appeared as a guest on the television programs Downtown DX, Guruguru Ninety-Nine (ぐるぐるナインティナイン) and Mecha-Mecha Iketeru!
On July 6, 2015, Tashiro was referred to the prosecutor's office for filming up a woman's skirt with his mobile phone in Tōkyū Den-en-toshi Line Futako-Tamagawa Station in Setagaya, Tokyo.
It was later discovered that he was warned many times by the staff, who became irritated with his habit of sneaking into the women's bathroom (possibly with camera equipment) and not emerging for hours; Fujiwara and other female television stars changed their clothes in the ladies' toilet when Tashiro was hiding inside.
[10] On December 9, 2001, Tashiro was arrested for peeping through the bathroom window of a man's house near his home in Kita-senzoku, Ōta, Tokyo by Den-en-chōfu police.
[11] According to the police, a 32-year-old man spotted Tashiro and ran after him for 300 meters wearing only a bath towel around his waist, catching him and delivering him to the station.
An eyewitness reported that Tashiro put on a ski cap, spoke loudly "Forgive me" (許してくれ, yurushitekure) and "It was a misunderstanding" (勘違いだ, kanchigai da) when he was caught, and a camcorder in the vicinity of the scene was recording.
[6] He said, "I used drugs to get rid of stress and tension before appearing on a TV program" for the investigation by the Tokyo District Prosecution Office.
On the night of September 20, 2004, Tashiro was arrested for violation of the Firearms and Swords Control Law on a Nakano street because he had a butterfly knife with a blade 8 centimetres (3.1 in) long.
The media referred to him as a "former entertainer", and footage of Rats & Star was almost never broadcast; when it was, Tashiro's voice was lowered or removed and he did not appear.
In The God of Entertainment (エンタの神様, enta no kami-sama), Sayaka Aoki (displaying only part of his name), said: "I put a camera in the chest drawer".
"[26] Torata Nanbu, leader of Tokyo Shock Boys and one of the people who had supported Tashiro's comeback, said: "My heart is aching very much.
[28] Tashiro was rumored to be returning to the public eye in spring 2004 before he caused a car accident on Ōme Kaidō in Suginami.
Tashiro temporarily reached the number-one position, passing Osama bin Laden and George W. Bush, on December 21, 2001.