Isao Ijima

was a Japanese zoologist known for his studies of sponges (Porifera) — including his circumscription of the genus ''Staurocalyptus'' — leeches (Hirudinea), flatworms (Turbellaria), birds, and fish. Professor of Zoology at Tokyo Imperial University, he is considered the founder of parasitology in Japan and was the first President of the Ornithological Society of Japan. Taxa named in his honour include Ijima's sea snake and Ijima's leaf warbler. Provided by Wikipedia