In 1973, debuted with the song “Koibito wa Kimi Hitori” under the stage name Eiji Yamaoka.
In 1977, changed his name to Ikuzo Yoshi, and released the song “Ore wa Zettai! Presley/Seishun Sou” from Crown Records on November 25th.
In 1984, as the lyricist/composer, provided the song “Tsugaru Heiya” to Masao Sen. In April, founded the company Yoshi Promotion. In November, transferred to Tokuma Japan and released “Orera Tokyo sa Ikuda/Furusato”. Found new grounds under the new office and new record company. Has provided numerous works to Masao Sen and other artists.
Has produced many commercial jingles and theme songs for TV dramas over the years.