
Why here
Manza Onsen is about 10 minutes by car on a clear day, about 15 in snow.
The mountain opens five days a week.Fiber desk by day, tent under stars at night.Bake pizza by the fire,and sleep under the stars.
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. Five 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.)
Two nights is when your body usually starts to settle.

At 1,444m, Tsumagoi's Work&Camp is ¥7,200/night solo (¥11,400 for 2 adults; ¥6,500 for check-ins through 30 Nov) with fiber coworking, heated showers, shared kitchen, gym and heated lounge included — 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 10 min away (about 15 in winter) 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.















