Kamimura studied at the Musashino art academy and worked then as illustrator. He made his debut in 1967 with Kawaiko Koyurichan no Daraku. His illustrations adorned a huge amount of books and record covers. He liked it to break existing tabus e.g. in 1972 he created a scandal with Dousei Jidai showing a swinging cohabitation of a unmarried couple. In the 70s and 80s he established oneself as drawer for demanding adult Manga Gekiga. He was very productive he drew approximate 400 pages per month. On January the 11th 1987 he died of a tumour in his pharynx.