A demanding ridge trail traversing the Kongo-Katsuragi Mountain Range along the Osaka-Nara border. The 'Diamond Trail' (named for the panoramic city views at night that resemble a field of diamonds) connects Mount Katsuragi (959 m) with Mount Kongo along a scenic ridge.
The Diamond Trail runs along the ridge of the Kongo-Katsuragi Mountain Range on the Osaka-Nara border, with popular day sections accessed from Kintetsu Tondabayashi or Kawachi-Nagano stations, both reachable from Namba without requiring a permit. The full trail spans roughly 45 km and takes about two days to complete, but most hikers tackle 8-15 km day sections with 500-800 m of elevation gain depending on the segment chosen. The terrain is a mix of dirt forest path and rockier ridge sections, with some exposed stretches along the higher ridgeline where wind and sun exposure increase compared to the forested valleys below; sturdy footwear is important given the uneven, sometimes rocky surface. The trail connects Mount Katsuragi (959 m) with Mount Kongo along a scenic ridge, passing through forest interspersed with open viewpoints over the Osaka plains. Katsuragi's summit is especially known for night views of Osaka's city lights, which give the Diamond Trail its name. There are mountain huts and rest shelters at intervals along the full route, along with signposted turn-around points at road crossings that allow hikers to shorten a section if needed. Water sources are limited to occasional mountain huts, so hikers should carry sufficient supplies for the length of the planned section. Given the distance and terrain, the trail suits experienced hikers comfortable with sustained hiking days rather than casual walkers.
Trail facts
- Trail area
- Southern Osaka Prefecture (Chihayaakasaka, Kanan, Habikino area)
- Best season
- October to November (clear autumn days with best visibility); avoid midsummer heat and the rainy season in June
Highlights
- Ridge views over Osaka plains
- Night views of Osaka city lights from Katsuragi summit
- Ancient pilgrimage route atmosphere
Tips for visiting
- Popular sections can be done as day trips — don't attempt the full trail in one day
- Start early to ensure daylight for descent
- Clear autumn days offer the best visibility
When to visit
Start early in the day to allow enough daylight for the full section, and choose a clear day for the best ridge and city-light views.
Accessibility
The trail is not wheelchair- or stroller-friendly; it follows unpaved ridge and forest paths with uneven, sometimes rocky terrain over long distances.
Frequently asked questions
Do hikers need to complete the full 45 km Diamond Trail in one trip?
No, most hikers choose an 8-15 km day section between marked access points, since the full trail is typically done as a two-day trek with an overnight stop.
What makes the Diamond Trail name significant?
The name refers to the night view of Osaka's city lights from Mount Katsuragi's summit, which resembles a scattering of diamonds.
Are there shelters along the Diamond Trail?
Yes, mountain huts and rest shelters are spaced along the full ridge route, though hikers on shorter day sections may not pass one depending on the segment chosen.
Is the Diamond Trail suitable for beginner hikers?
The trail's distance, elevation gain, and exposed ridge sections make it better suited to hikers with prior hiking experience rather than first-timers.