観音寺, Buddhist temple in Suzuka, Japan

Kannon-ji Temple is a Buddhist temple located in Suzuka featuring traditional Japanese architecture with wooden structures and stone pathways throughout its grounds. The temple grounds contain various religious statues and spaces for prayer arranged in typical Buddhist temple design.

Tradition holds that Kōbō Daishi founded the site in 812, enshrining the spirit of Yamato Takeru as a Buddha image on Kōjiyama. In 1087 the monk Hōryō found an eleven-faced Kannon statue beneath a great hinoki here and built a hall for it. The temple declined in the Middle Ages, then was revived in 1633 by the ascetic Arazawa Junka after his blindness was cured; Kasuga no Tsubone donated a bell and five Buddhist statues. In 1691 it became a Kōyasan branch temple and took the name Kōjinzan.

The temple is popularly known as Kōjin-yama Kannon-ji after the Kōjin-yama quarrel, a private fight between two kyōkaku that took place on the hill behind it and was retold in kōdan and rōkyoku; the rōkyoku performer Hirozawa Torazō erected a monument here to Kira no Nikichi, who died in that fight. Annual observances include the setsubun star offering in February, the spring kaishiki on 7–8 April with prayers for victory and protection from misfortune, and the Bon memorial on 15 August.

The temple stands at 1777 Takatsuka-cho, about 5.5 km northwest of Kintetsu Hirata-machi Station on the Suzuka Line, or roughly 3 km northwest of the Kasedo intersection on National Route 1. By car from the Suzuka Interchange on the Higashi-Meihan Expressway it is about 5.5 km to the southeast. Nearby are Suzuka Flower Park, Shiratorizuka Kofun and Kasedo Shrine.

The temple is commonly called Arakozan Kannon-ji after the Arakozan no Kenka, a 1866 feud between the gang bosses Kōbe Chokichi and Anō Toku on the hill behind the temple. The story spread through kōdan and rōkyoku, and the rōkyoku performer Hirozawa Torazō put up a monument here to Kira no Nikichi, who died in the fight.