He obtained Toketsu (a collection of questions on Tendai doctrine posed by Japanese Tendai monks with answers by Chinese Tiantai masters) from Koshu and Iken of Mt. Tendai (Mt. Tiantai) and sent it to Japan through his disciple, Ninko.
天台山広修・維蠲（いけん）の「唐決」を得て弟子の仁好（にんこう）に託して日本に送った。