Right Onsen › Gunma › Tsumagoi
Manten-no-Yu
4.7★ · 6 Google ratings · Tsumagoi, Gunma · 万天の湯
✓ Natural hot-spring water✓ Free-flowing source water
Before you go
Can you bathe here?
Day visitors
✓ Yesstated on the facility's website · read 2026-09
Price
¥4,400stated on the facility's website · read 2026-09
Tattoos
Not known · call aheadno policy stated in the 4 recent reviews we read or on the facility's website
The bath
What you’ll find
A sulfur, milky-white hot spring bath at the Nisshinkan ryokan in Manza Onsen, reserved for overnight guests only, with three indoor baths and an outdoor bath overlooking the spring source.
Outdoor bath
✓ YesAn outdoor bath is available with a view overlooking the spring source itself.stated by 2 visitors · Sep 2024 – Aug 2025
Indoor baths
3Three separate indoor baths are available, with open windows offering a view.stated by 1 visitor · Aug 2025
The water
Spring type
Sulfur, milky-whiteA sulfur spring with milky-white water and a distinct sulfur smell.stated by 2 visitors · Aug 2025 – Aug 2026
Guide
What visitors add
The water
Two reviewers describe a sulfur spring — one (Aug 2026) calling it milky white, the other (Aug 2025) noting the indoor bath is filled with sulfur scent.
stated by 2 visitors · Aug 2025 – Aug 2026Outdoor bath & sauna
There is an outdoor bath from which the hot-spring source itself is visible, plus three indoor tubs with large open windows and views — per one detailed reviewer (Aug 2025); a second reviewer (Sep 2024) also calls the spot a rotenburo just below Nisshinkan. No reviewer mentions a sauna.
stated by 2 visitors · Sep 2024 – Aug 2025Practical
Plan your visit
📍 Hoshimata, Tsumagoi, Agatsuma District, Gunma 377-1611
🚃 Fukurogura station, 12.3 km
📞 +81279-97-3131
📋 Show at the counter: 万天の湯
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