As a zoologist, has contributed in the field of fish taxonomy, as well as reptiles and amphibians.[2] Okada's primary work in English was Fishes of Japan, which published in 1955 by Maruzen and subsequently issued in revised editions.[3]
References
^"Okada Yaichirō". Nihon jinmei daijiten+Plus. Kōdansha. Retrieved 7 February 2013.