It is historically associated with Kōbō Daishi, the founder of the Shingon school of Buddhism who is central to the Shikoku pilgrimage.
The temple belongs to the Buzan sect of Shingon Buddhism.
It is one of several temples in Ehime Prefecture that serve as vital resting points for itinerant Henro pilgrims traveling on foot.
The temple's name, Kōon-ji, literally translates to 'Fragrant Sound Temple' or 'Temple of Imperial Grace'.
The temple grounds contain a water basin specifically designed for the traditional purification ritual before prayer.
Ko-onji is the 61st temple on the Shikoku 88 Temple Pilgrimage, located in the foothills of the Ishizuchi mountain range. The temple is formally known as Kōya-san Kōon-ji and is dedicated to the Bodhisattva Kōbō Daishi. The site features a main hall (Hondō) and a Daishidō hall, which are standard for Ohenro pilgrimage sites. The temple grounds house a collection of stone statues and are surrounded by the rural landscape of the Saijō plain. It maintains a historical connection to the Shingon sect of Buddhism. Visitors often pass through this location while traversing the path between Temple 60 and Temple 62. The architecture reflects traditional Japanese temple styles built for mountain-based devotion. Its elevation provides a distinct vantage point over the local Komatsu region.
The view of the temple gate framed by the backdrop of the Ishizuchi mountain range.
Bring a stamp book (nōkyōchō) if you intend to collect calligraphy stamps from the resident monks.
Wear comfortable, broken-in walking shoes, as the terrain around the temple entrance can be uneven.
Check the local weather forecast, as the foothills of the Ishizuchi mountains experience rapid changes in temperature.
Do not take photographs inside the prayer halls, as this is considered disrespectful to worshippers and sacred icons.
Maintain silence, remove footwear before entering interior temple halls, and bow slightly before and after visiting the main altars.
