[6] In 1999, Saitō formed a comedy duo called Abare Nunchaku with fellow up-and-coming comedian Kosuke Takeuchi.

[7] The team broke up in 2005, but they reunited in 2006 on the show Enta no kami-sama, where Saitō appeared for the first time as Sukeban Kyoko, a delinquent schoolgirl always seen carrying shinai bamboo sword.

[7] By the time of his death, he had released seven albums: Gekimajimukatsuku, 1000% SO Zakune?, Christmaster, Doonacchattendayo, Kaisou Rasputin, Sakura Revolution, and Aserunda Joshi Ha Itsumo Medatanai K.[11] He also sang with the band Bijomen Z, a musical group where all its members dressed as women.

[8][7] As a voice actor, Saitō starred in shows such as Detective Conan and Inazuma Eleven,[7] sometimes using the stage name Hiromi Ueda.

[15] Saitō was killed in a traffic accident on October 5, 2013, aged 37, on the Chugoku Expressway in Mine, Yamaguchi, while en route to a concert in Kumamoto Prefecture.