We checked official tourism and property pages on 2026-10-28. Use this page to compare baths and policies, then confirm with the property before you book.
Destination
Spring types and access
Japanese name: 箱根温泉
Access: From Shinjuku Station: Odakyu Romancecar to Hakone-Yumoto, approximately 85 minutes; transfer onward for other Hakone districts.
Some rooms have a private open-air onsen. Keikoku-no-Notenburo can be reserved for your group for 45 minutes, assigned on arrival in order of request. In the morning it is a shared bath for women only.
Private-bath fee
5,500 yen per group for 45 minutes; eight groups a day, booked on arrival. As of 2026-10-28 on the official page.
Children under three stay free. Ages 3 to 6 and 7 to 12 have their own meal, bedding and co-sleeping options. Children who are not toilet trained cannot get into the shared tubs but may use the washing area or the open-air bath in your room.
Baths
Every room has a private open-air bath. Separate private bath to book: Not published.
About three minutes by free shuttle bus from Hakone-Yumoto Station.
Kids
Children under elementary school age (stated as seven) cannot use the shared baths and are directed to the private baths. Guests in diapers who are not toilet trained cannot use the hot spring.
Baths
A day-use spa with 19 private bath rooms you can book up to a month ahead.
Where tattoos are OK
Shared and private baths; the other entry rules still apply.
https://www.hakone.or.jp/6909 (checked 2026-10-28). Destination identity, Japanese name, location, region/prefecture, spring_types and summary_facts; see additional sources for access where listed.
https://yamanochaya.com/faq/ (checked 2026-10-28). Identity, Japanese name/location, private room baths, separate private-bath rules and exact fee, spring_type and explicit shared-bath tattoo permission.