Kōyasan Shingon-shū (高野山真言宗) is a Japanese sect of Shingon Buddhism.
Headquartered on Mount Kōya in Wakayama Prefecture, it is also the oldest and largest of the eighteen Shingon sects in Japan.
[1] The main temple is Kongōbu-ji.
[2] As of 2007[update], there are nearly 4,000 affiliated Kōyasan Shingon-shū temples in and beyond Japan.
[2] There are missions in North America and Hawai'i specifically that function as non-profit arms of the section.