[2][3] After graduating from Keio University, Saitō formed the band "You" in 1980 before pursuing a career as a music producer.
[1] Since his work on Chisato Moritaka's debut album New Season, he has composed more than 60 songs for her.
[1] In 1993, Saitō became the first Japanese composer to release songs in South Korea.
Saitō served as a judge in the NTV talent show Uta Star!!
In November 2013, Saitō produced the song "Voice", which was recorded by 23 musicians in 14 countries to support the victims of the 2011 Tōhoku earthquake and tsunami.