Higashi Hongan-ji (東本願寺), or, "the Eastern Monastery of the Original Vow", is one of two dominant sub-sects of Shin Buddhism in Japan and abroad, the other being Nishi Honganji. It is also the name of the head temple of the Ōtani-ha branch of Jōdo Shinshū in Kyoto, which was most recently constructed in 1895 after a fire burned down the previous temple. As with many sites in Kyoto, these two complexes have more casual names and are known affectionately in Kyoto as Onissan and Ohigashisan .

Jōdo Shinshū , also known as Shin Buddhism or True Pure Land Buddhism, is a school of Pure Land Buddhism founded by the former Tendai Japanese monk Shinran.