Career
He is best known for his manga series Bonobono and After leaving Miyagi Prefectural Furukawa Kōgyō High School (宮城県古川工業高等学校, Miyagi-ken Furukawa Kōgyō Kōtō Gakkō) before graduating, Igarashi worked for an advertising company in their print shop. While working there, he made his professional debut as a manga artist in 1972.