The temple was established in 642, predating the construction of the larger Zenko-ji in Nagano City by several decades.
The main icon, the Zenko-ji Nyorai, was moved to Iida for safekeeping during historical power shifts before eventually settling in Nagano.
The Okaidan-meguri tunnel represents a symbolic journey of rebirth, requiring participants to navigate total darkness.
The temple grounds contain a rare stone monument dedicated to the historical migration of the main Buddhist icon.
It is one of the few places in Japan that still maintains a direct liturgical connection to the founding legend of the Zenko-ji faith.
Moto-Zenkoji Temple in Iida is the historic precursor to the famous Zenko-ji in Nagano City, housing the original Buddhist statue that moved between locations in the 7th century. The temple's name 'Moto-Zenkoji' translates to 'Original Zenkoji,' reflecting its role as the site where the Hibutsu (secret Buddha) was first enshrined after being brought from India via Korea. The grounds contain a Hondo (Main Hall) and various smaller structures typical of regional Tendai-sect architecture. It is known for its peaceful, forested setting that preserves the traditional atmosphere of the Ina Valley. Visitors can participate in the 'Okaidan-meguri,' a ritual involving walking through a pitch-black subterranean corridor beneath the temple to reach the 'key to paradise.' The temple is officially recognized as a significant cultural site preserving the early history of the Zenko-ji sect in Japan.
The path leading up to the main gate framed by the surrounding cedar trees.
Bring a pair of slip-on shoes for easy removal when entering the wooden temple buildings.
Ensure you have a small flashlight if you are nervous about total darkness, though the ritual is meant to be done without one.
Visit the temple office to inquire about the history of the statue migration to understand the significance of the 'Original' title.
Do not rush through the Okaidan-meguri; the experience is intended to be meditative and slow.
Remove shoes before entering temple buildings; remain quiet and respectful in prayer areas; do not photograph the interior altars.
