Every six years, in the hills around Lake Suwa in Nagano Prefecture, teams of men climb onto 1,000-year-old fir logs the size of telephone poles and ride them down a near-vertical slope while thousands of spectators hold their breath. This is Onbashira, one of Japan’s most dramatic and least-known-to-foreigners festivals, and it’s held at Suwa Taisha, one of the country’s oldest Shinto shrines. If you can time a trip around it, it’s unlike anything else on the festival calendar.
What Is the Onbashira Festival?
Suwa Taisha (諏訪大社) is actually four separate shrine sites arranged around Lake Suwa: Kamisha Honmiya and Kamisha Maemiya in Chino City, and Shimosha Harumiya and Shimosha Akimiya in Shimosuwa Town. Each of the four sites has four sacred pillars, called onbashira, standing at its corners — sixteen pillars in total. Tradition holds that these pillars must be replaced every six years with freshly cut fir trees from the surrounding mountains, and the festival is the multi-week process of felling, transporting, and re-erecting them.
The logs are enormous — up to around 17 meters long and several tons each — and moving them without modern machinery, by hand, rope, and sheer manpower, is the whole point of the ritual. The most famous moment is the kiotoshi (木落し, “tree drop”), where young men ride a log as it’s released down a steep slope, clinging on as it picks up speed. Falls and injuries happen most years, and it’s sometimes listed alongside Kishiwada’s danjiri and the Nozawa Onsen fire festival as one of Japan’s most dangerous traditional events.
When Is the Next Onbashira Festival?
Onbashira is held in the years of the Tiger and the Monkey according to the Chinese zodiac — so every sixth year, not every twelve. The most recent festival took place in 2022. The next full Onbashira Festival will be in 2028. Exact dates are set by Suwa Taisha roughly a year in advance, but the pattern has consistently been early April for the mountain phase and early May for the town phase, usually spread across several weekends so that both the Kamisha and Shimosha sites each get their own events. If you’re planning around this, treat early April through early May 2028 as the target window and watch Suwa Taisha’s official announcements as the year approaches for confirmed weekends.
Yamadashi and Satobiki: The Two Phases
The festival unfolds in two distinct stages, roughly a month apart:
- Yamadashi (山出し, “mountain exit”) — Early April. Logs are hauled out of the forest and down to the valley by teams pulling on thick ropes, including the kiotoshi slope-ride and a river crossing (kawagoshi) through the cold Miyagawa river. This is the rougher, more physically dramatic half, and the one most visitors come for.
- Satobiki (里曳き, “village pull”) — Early May. The logs are paraded through town, often with floats, music, and dancing, before being hoisted upright at the four corners of each shrine in a ceremony called tateonbashira.
Each phase runs across multiple days, and Kamisha and Shimosha hold their events on different weekends, so check which shrine and which phase you’re trying to see before booking travel — it’s easy to arrive on the wrong weekend for the site you wanted.
Getting to Suwa Taisha and Lake Suwa
The Suwa area sits on the JR Chuo Line, roughly in the middle of Nagano Prefecture.
- From Tokyo: Take the JR Chuo Line Limited Express Azusa from Shinjuku Station to Chino, Kami-Suwa, or Shimosuwa Station — about 2.5 hours, with a reserved seat typically costing around ¥7,000–7,500 one way.
- From Nagoya: Take the Limited Express Shinano toward Nagano and get off at Shiojiri, Kami-Suwa, or Shimosuwa — roughly 1.5–2 hours. If you’re routing through Nagoya from the Kansai side, it’s worth a short stop to try kishimen, Nagoya’s own flat wide noodle, before changing trains.
- Local transport: Kamisha’s sites are a short bus or taxi ride from Chino Station; Shimosha’s sites are walkable from Shimosuwa Station. During the festival, expect local shuttle buses and temporary road closures — walking between viewing points is often faster than driving.
Where to Watch, and What It Costs
Most of the festival is free to watch from public roadside areas, but the best vantage points for the kiotoshi slope fill up early.
- Budget: Standing along the general route or at the base of the slopes costs nothing, but arrive at least an hour early for a sightline. Bring your own seat cushion or a folding stool — a 100-yen shop like Can Do or Watts is a cheap source for a foam cushion, disposable rain poncho, and hand warmers, since early April in Nagano can still be cold and showery.
- Mid-range: Paid grandstand seats near the kiotoshi slope are sold in limited numbers by the local tourism association, usually for a few thousand yen, and tend to go on sale online or by postcard lottery months ahead — worth checking Shimosuwa or Chino tourism sites as soon as 2028 dates are confirmed.
- Splurge: Book a room at one of the onsen ryokan around Kamisuwa Onsen, right on Lake Suwa — some have lakeview baths and multi-course kaiseki dinners for upwards of ¥30,000 per person, and festival-weekend rooms sell out roughly a year in advance.
If you want polished photos of the day rather than just phone shots in a crowd, some visitors arrange a local photographer to shadow them for a few hours around the festival route — see our guide to hiring a photographer in Japan for how outdoor packages typically work and cost.
Common Mistakes to Avoid
- Showing up in a non-festival year expecting the full event. Onbashira only happens every six years. In between, Suwa Taisha is a beautiful but quiet shrine complex.
- Booking Suwa accommodation late. Rooms around Lake Suwa and even in Matsumoto or Nagano City sell out well over six months ahead of festival weekends.
- Getting too close to the slope. Kiotoshi is genuinely dangerous — logs and riders can go off-course, and spectators have been hurt in past years. Stay behind the ropes and follow staff instructions, even if it blocks your view.
- Mixing up Kamisha and Shimosha. They’re different shrine sites with separate schedules; double-check which event matches the dates you’ve booked.
- Underestimating the cold. Early April mountain mornings in Nagano can be near freezing even when Tokyo feels like spring — dress for it.
Visiting Suwa Taisha Outside Festival Years
You don’t need to hit the six-year window to appreciate the shrine. All four Suwa Taisha sites are open to visitors year-round, free to enter, generally from early morning until dusk, and the onbashira pillars themselves stand quietly at each shrine’s four corners between festivals — a worthwhile stop if you’re already exploring Nagano’s mountains, hot springs, and soba country. After a morning at the shrine, a coffee break is an easy way to warm up; see our comparison of Doutor, Komeda, and kissaten for what to expect from Japan’s everyday coffee chains, several of which have branches around Nagano’s train stations.