Day buyout
Daytime use, no overnight stay
¥120,000up to 30 guests · per day (incl. tax)
31–50 guests: ¥180,000
Plateau
Why here
Wide open plateau with mountain views, low light pollution — and Manza Onsen sulphur springs about ten minutes away.
36°31′N · 138°33′E
2025 · Gunma plateau
The mountain opens three days a week.Fiber desk by day, tent under stars at night.Sleep under the stars.
A resthouse, reborn
Hi, I'm Kenji. With my wife and a few stubborn friends, I brought an old resthouse back as our own workplace at 1,444m, with no houses for 7km. Three days a week we open the mountain to guests. Fiber desk by day, tent and fire at night. (Oat-milk latte: still working on it.)
The sunset is around 18:30. Two nights is when your body usually starts to settle.
Tokyo coworking day use runs ¥3,300 — eight hours at a desk, then home. Glamping in Gunma and Nagano averages ¥15,000–¥35,000 per person per night — one night, full service, no desk. Coliving in Japan runs $1,300–2,500/month in the city. Tsumagoi is ¥7,200/night solo (¥11,400 for 2 adults; ¥6,500 for check-ins through 30 Nov) all-in at 1,444m: fiber coworking, heated showers, shared kitchen, gym, heated lounge — you sleep in a tent. Day use ¥2,000 (kitchen included). Seven nights takes −15% on the same pass (standard-era solo 7N ≈ ¥42,800) — the deepest rate; stays cap at 7 nights.
This used to be a roadside resthouse on the Manza Highway — the kind of place where travellers pulled over for the view, an ice cream, and a ring of the 愛妻の鐘, the "Bell of the Beloved Wife." Then it sat empty for more than five years. I started renting it in autumn 2025. Renovating took the best part of a year, mostly because the winters up here simply tell you to stop. My wife, a few stubborn friends and I camped on the empty ranch through that first winter — no heating, just a kerosene stove, no working shower, an unusable kitchen. We survived. Then we double-glazed the whole building, and now the indoors stays warmer than the outside. Small victories.
I built Tsumagoi for people who want to ship code in silence and eat pizza under stars — not for families wanting a playground or hotel turndown. Day use exists, but this place is three hours from Tokyo; you'll miss the sunset over Asama-Shirane, the plateau going quiet at 22:00, and Manza Onsen about ten minutes away if you leave before dark. One night is bookable; two nights is when the mountain usually starts to work. Pack a layer, a sleeping bag, your laptop.
Kenji
