Kai Zenkoji is a branch temple of the far more famous Zenkoji in Nagano, founded when Takeda Shingen had the original temple's principal image evacuated to Kofu during 16th-century warfare. Like its parent temple, it offers the 'kaidan meguri' - a pitch-black underground passage beneath the main hall that visitors walk through by feeling along the wall for a key-shaped handle said to grant a connection to Buddha. The temple's main hall is one of the largest wooden structures in the prefecture.
Kai Zenkoji is a Jodo-sect temple founded in 1558 by Takeda Shingen, who established it as a branch of the original Zenkoji temple in Nagano to house sacred Buddhist statuary evacuated from that temple during the prolonged warfare of the Kawanakajima campaigns between Shingen and his rival Uesugi Kenshin. The temple's large wooden main hall, rebuilt after fire in the Edo period and again restored more recently, follows the same general design as its Nagano namesake, and beneath the hall runs a dark underground passage (kaidan meguri) that visitors walk in complete darkness while tracing a wall, said in tradition to lead past a sacred key that offers a blessing to whoever touches it, a devotional practice shared with several other Zenkoji-lineage temples across Japan. The temple's bell tower and Sanmon gate, along with a small garden, round out the grounds, which see a mix of local worshippers and history-minded visitors drawn by the Takeda clan connection. Because Kai Zenkoji sits somewhat apart from Kofu's other Takeda-related sites, it tends to be visited on its own rather than paired into a single walking loop with Takeda Shrine or Maizuru Castle Park, though all three can be combined in a single day with bus or taxi transfers. A visit through the grounds, main hall, and underground passage takes about 30 to 45 minutes.
| Admission | Adult Grounds free; main hall and underground passage approx ¥400 ($2.50) · Child Reduced rate |
|---|---|
| Hours | 9:00am–4:00pm |
| Typical visit | 30–45 minutes |
| Best time | Weekday mornings for a quiet visit |
| Getting there | Bus from JR Kofu Station toward Zenkoji, roughly 10 minutes |
| Address | 6-14-1 Zenkoji, Kofu, Yamanashi 400-0015 |
Location
6-14-1 Zenkoji, Kofu, Yamanashi 400-0015
35.6764, 138.5931 View on map
Highlights
- Founded in 1558 by Takeda Shingen as a branch of Nagano's original Zenkoji temple
- Dark underground passage (kaidan meguri) walked while tracing a wall toward a symbolic sacred key
- Large wooden main hall following the design of the Nagano Zenkoji original
- Historic bell tower and Sanmon gate on the temple grounds
- Direct historical tie to the Kawanakajima campaigns between Takeda Shingen and Uesugi Kenshin
Tips for visiting
- Try the underground passage (kaidan meguri) for the temple's signature devotional experience, walked in complete darkness
- Visit on a weekday morning for the quietest visit, as the temple sees fewer tour groups than central Kofu's Takeda sites
- Bring a small amount of cash for the separate main hall and passage admission fee
- Combine the visit with Takeda Shrine and Maizuru Castle Park using local buses for a fuller Kofu history day
- Move slowly and keep one hand on the wall throughout the underground passage, as it is genuinely pitch dark
When to visit
Weekday mornings for a quiet visit outside tour-group hours.
Accessibility
The main grounds are mostly level and accessible, but the underground passage involves a dark, narrow stairway and corridor that is not wheelchair accessible.
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Frequently asked questions
How long does a visit take?
A visit through the grounds, main hall, and underground passage takes about 30 to 45 minutes.
Is it worth it for kids?
The underground passage experience is often memorable for children, though very young children may find the complete darkness unsettling.
Is photography allowed?
Photography is generally permitted on the grounds and in the main hall exterior; photography is not possible inside the completely dark underground passage.