Handō-ji, Buddhist temple in Kōka, Japan.

Handō-ji is a Tendai temple in Koka, Shiga Prefecture, now at the foot of Mount Handō-san (664 m). Its name and dharma lineage come from the original mountain temple, whose extensive monk-cell ruins and Handō Shrine remain on the summit overlooking the Shigaraki Palace site. The present temple, formerly Honkaku-in, houses three Heian and Kamakura statues from the old Jōfuku-ji.

Tradition recorded in the temple's origin scrolls credits its founding to En no Gyōja, with a restoration in 714 by Ankyō, though the actual origins are unclear and likely grew from mountain ascetics and monks linked to Konshō-ji. In the Nanboku-chō period a fortress called Handō-ji-jō stood on the summit, and in 1337 retainers of Sasaki Dōyō fought there. The temple was abolished under the Meiji separation of Shinto and Buddhism, then revived in 1892 when the Tendai temple Honkaku-in of Minakuchi took over its name and lineage.

The temple's name and rites descend from the mountain shrine-temple on Mount Handō, where the deity Handō Gongen was venerated as a grain god and protector of the Shigaraki forests. The present temple, revived in 1892 from the Tendai temple Honkaku-in at the mountain's northern foot, keeps three Heian and Kamakura statues from the former Jōfuku-ji, including an Amida figure 68.7 cm tall.

The temple stands at the northern foot of Mount Handō-san, not on its 664-metre summit, where only the old monks' quarters and the Handō Shrine remain. The summit traces lie above Shigaraki Palace ruins and are reached on foot; the present temple is the former Hongaku-in in Mitsudera. The three Heian and Kamakura statues are kept on this site.

The mountain's yamabushi were the origin of Koka's medicine peddling: they distributed pills such as Mangan-kin, moxa and a stomach remedy while collecting donations for temples from Atago to Fushimi Inari. The monk-soldier quarters on the summit also hold the grave of Mokujiki Ogo, who died there in 1608.