The Shinano Kokubun-ji (信濃国分寺) is a Tendai sect Buddhist temple located in the city of Ueda, Nagano, Japan. Its honzon is Yakushi Nyōrai. It is the successor to the Nara period kokubunji National Temples established by Emperor Shōmu for the purpose of promoting Buddhism as the national religion of Japan and standardising control of the Yamato rule to the provinces. The archaeological site with the ruins of the ancient temple grounds for the provincial temple and its associated provincial nunnery was collectively designated as a National Historic Site in 1974.