箱根 · 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 55 properties, ranked by rating and popularity

Hakone · Kanagawa · Hakone
“In Every Room, a Private-Source Rotenburo Flows”

Hakone · Kanagawa · Hakone
“A grown-up world hidden in a bamboo grove”

Hakone · Kanagawa · Hakone
“Just five guest-house suites on a thousand tsubo of mountainside — a ryotei ryokan in Oku-Yugawara”

Hakone · Kanagawa · Hakone
“A river past every room, a hideaway for grown-ups only”

Hakone · Kanagawa · Hakone
“Across the Bridge, a Forest Hideaway for Adults”

Hakone · Kanagawa · Hakone
“Hakone's Sengokuhara, Ten Rooms Each with Its Own Hot Spring Bath”

Hakone · Kanagawa · Hakone
“Hakone Miyanoshita — A Ryokan of Four Seasons, Fed by Its Own Hot Spring”

Hakone · Kanagawa · Hakone
“Dyed in Hakone's deep water hues”

Hakone · Kanagawa · Hakone
“Gora's First Spring, Where Emperor Showa Once Stayed”

Hakone · Kanagawa · Hakone
“The place in Hakone Yumoto where thirteen baths are more than one day can hold”