熱海 · 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 30 properties, ranked by rating and popularity

Izu · Shizuoka · Atami
“218 years of warmth from a private spring”

Izu · Shizuoka · Atami
“The retreat that captured Yokoyama Taikan's heart”

Izu · Shizuoka · Atami
“3 minutes on foot from Atami Station, a kakenagashi ryokan fed by two private springs”

Izu · Shizuoka · Atami
“A hillside embracing the sea, source water flowing in every room”

Izu · Shizuoka · Atami
“At the cliff's edge, an infinity bath that meets the sea”

Izu · Shizuoka · Atami
“Fall asleep to the waves, wake up to the sea”

Izu · Shizuoka · Atami
“Rooms named for the flowers of the Man'yoshu, baths open to the sky”

Izu · Shizuoka · Atami
“Private Baths Steaming Above Sagami Bay”

Izu · Shizuoka · Atami
“3 minutes to the sea, a ryokan flowing with its own 94°C source”

Izu · Shizuoka · Atami
“Half a century held in a garden of stone”