Kanshin-ji (観心寺) is a Buddhist temple located in the Teramoto neighborhood of the city of Kawachinagano, Osaka Prefecture, in the Kansai region of Japan. It is one of the head temples of the Kōyasan Shingon-shū branch of Shingon Buddhism. The temple has several National Treasures and Important Cultural Properties. Its precincts were designated a National Historic Site in 1972. and a Japan Heritage site.

Kawachinagano is a city located in Osaka Prefecture, Japan. As of 31 January 2022, the city had an estimated population of 101,649 in 47493 households and a population density of 930 persons per km2. The total area of the city is 109.63 square kilometres (42.33 sq mi).