It's a good hot spring if it's not crowded.
You'll need two 100-yen coins for shoes and a locker.
Body soap, rinse-in shampoo, and a hair dryer are provided.
Low water pressure in the shower, but a full-body shower is available.
The water is directly from the source, so there's no floating debris like at "Yunni no Yu."
The changing rooms are cleaned regularly, so there's little hair or debris.
However, it gets super crowded on Sunday afternoons.
There are few rest areas, so it's difficult to stay in for long periods of time.
The hot spring is effective and warms the body sufficiently.
It's close to Sapporo, so if you can go on a weekday, it's probably fine.
Whenever I go to Naganuma Town for camping or a meal, I always warm up here before heading home.
(It's close to the campsite, so it can get a little crowded with campers in the summer.)
The baths are reasonably spacious, and I personally prefer the spring water, which has a higher salt content and warms me to the core.
The hot spring tofu available at the shop or at Naganuma Tofu Workshop, located in the building next to the hot spring, is delicious, making it the perfect snack to enjoy with an evening drink when I get home.
Naganuma Onsen has sodium chloride spring water maintained at 40-42 degrees Celsius. The water is used for treating muscle fatigue, joint pain, and circulation issues.
Gender-separated indoor baths with basic changing rooms and bathing areas. English signage is limited.
Primarily a local community facility with minimal tourist infrastructure and limited English support. Suitable for travelers seeking an authentic, budget-friendly hot spring experience.
The onsen operates year-round with no seasonal restrictions. Winter months (December-February) offer the traditional experience of bathing in hot springs during Hokkaido's cold season, while summer provides comfortable weather for exploring the surrounding agricultural area.
Like many community-oriented onsen facilities in Japan, Naganuma Onsen may restrict entry to visitors with tattoos. Check policies with staff before bathing, as rules can vary by facility and tattoo size.