Nago-dera (那古寺) is a Buddhist temple located in the city of Tateyama in southern Chiba Prefecture, Japan. The temple is also called Nago-ji using the alternate pronunciation of the final Chinese character in its name, or the Nago Kannon (古寺観音), after its primary object of worship.
Shingon Buddhism (真言宗, Shingon-shū) is one of the major schools of Buddhism in Japan and one of the few surviving Vajrayana lineages in East Asia, originally spread from India to China through traveling monks such as Vajrabodhi and .