Media artist, Chairman of the NicoNicoGakkai Beta Executive Committee, Senior Researcher at the National Institute of Advanced Industrial Science and Technology (AIST). PhD (Information Science and Technology). Graduated from University of Tokyo Graduate School of Information Science and Technology. The NicoNicoGakkai Beta won the Prix Ars Electronica in 2013. Major publications, "Patterns, Wiki, and XP", "I tried to research the NicoNicoGakkai Beta", "Evolving Academia".