Japanese arranger, composer, music producer, and motor journalist. He currently resides in Setagaya, Tokyo. He is a graduate of Keio Senior High School and Keio University. Aliases include "Manta" and "Yumin teishu". His wife is singer-songwriter, composer, and lyricist Yumi Matsutoya.

In 1971, he participated as a background musician in Takuro Yoshida's album, "Ningen nante." He began to frequently perform with Yoshida as the keyboard player in other albums and live performances, and also began his first work with arrangement. In 1973, he formed the group "Caramel Mama" with fellow musicians Haruomi Hosono, Shigeru Suzuki, and Tateo Hayashi. This group later evolved into a group named "Tin Pan Alley."