Koichi Okada was a Japanese landscape painter who worked with the publisher Unsodo on a series of woodblock prints of Japan during the late 1940s. Born in 1907 in Tokyo, Okada studied with Ishii Hakutei and Arishima Ikuma. His paintings were exhibited at Teiten and Nitten and he was a member of the art group Issuikai. Outside of Japan, Okada is primarily known for his strikingly detailed woodblock prints of Mt. Fuji.