長野 · BEST 10
Gensen kakenagashi means fresh spring water flows straight into the tub and out again — no recirculation, no reheating. It's the first thing onsen connoisseurs look for.
Top 10 of 121 properties, ranked by rating and popularity

Nagano
“400 Years, Six Springs, a Town Walked in Yukata”

Nagano
“A forest where the gods dwell, a hot spring at 1,050 meters”

Nagano
“140 years of spring water, four seasons in Yudanaka”

Nagano
“A private open-air bath with Lake Suwa in it”

Nagano
“Sixty Years in Business, an Open-Air Bath Under Starlight”

Nagano
“A century-old ryokan embracing all of Lake Suwa”

Nagano
“The 1,300-Year-Old Beauty Water Recorded in The Pillow Book, at Bessho Onsen's Tamaya”

Nagano
“A Kamikochi gorge, a night fed by the source”

Nagano
“Just 5 rooms, each with its own open-air bath, filled with 100% source water — untouched, unheated. A hideaway in Shinano.”

Nagano
“Beauty Water Under a Village of Stars”