During high school Moriwaki held a number of voluntary planning events in the local live house Blow Down in Hirakata.
He passed the 1st Shochiuku Geino Tarento Audition during his second year in senior high school.
In the 17 March 1984 Moriwaki joins Shochiku Geino and later in June he debuted in a vaudeville show.
and the Kansai Local programme Kenji Moriwaki no Seishun Vegetable in the Kinki area.
Later in the 1990s he appeared in dramas and presenting variety programmes and he stepped down from Waratte Iitomo!