We aim for pest managements in a way with low impact to the environment. Our interest also goes to conservation of insect communities, use of ecosystem services by insects in agriculture. Our current research themes are; 1) pollination biology of insects in agricultural ecosystems, 2) host range evolution of herbivorous invasive insects, 3) life history evolution of herbivores and their parasitoid wasps, 4) inter-specific relationship of two closely related Bactrocera fruit flies.