plasmodium japonicum plasmodium japonicum plasmodium japonicum is a parasite of the genus plasmodium. plasmodium japonicum scientific classification kingdom: protista phylum: apicomplexa class: aconoidasida order: haemosporida family: plasmodiidae genus: plasmodium species: p. japonicum binomial name plasmodium japonicum like all plasmodium species p. japonicum has both vertebrate and insect hosts. the vertebrate hosts for this parasite are birds. description the parasite was first described by manwell in 1966.