箱根小涌園ユネッサン
神奈川県・足柄下郡箱根町・Water park
Oversized vehicles (campervans)： The operator publishes nothing about oversized vehicles. We do not guess — call the facility before you go.
Hakone Kowakien Yunessun is a hot-spring facility operated by Fujita Kanko, which opened in 2001 and marks its 25th anniversary in 2026. The swimsuit-required "Yunessun" section is divided into Sea, River, Mountain, and Sky areas, featuring a wine bath, a coffee bath brewed by what is billed as Japan's first cold-drip hot-spring method, and the 360-degree rotating slide "Rockies' Splash" (height 105cm+ required), added in March 2025. A separate Japanese-style area, "Mori no Yu," is also available. Pricing follows a three-tier system by date, with Yunessun-only admission at 2,500-3,000 yen for adults and a combined Yunessun-plus-Mori-no-Yu ticket at 3,500-4,000 yen.
- Capacity 510
- Parking fee ¥1,300
- 第1駐車場180台・第2駐車場330台。2時間まで無料、平日1日1,300円、土日祝・繁忙期1,600円。営業8:00〜22:00で、22時以降は2日分の料金。車中泊は禁止