Mercure Toyama Tonami Resort & Spa
メルキュール富山砺波リゾート＆スパメルキュールとやまとなみリゾートアンドスパ
Open-air onsen with views of Tonami Plain at a large resort hotel
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
Views
MountainsAbout
The bathing area has a large indoor bath and a separate open-air rock bath (rotenburo, 露天風呂) called Ecchu Tonami Onsen (越中となみ温泉). Only the outdoor bath draws natural spring water; the indoor pool runs heated water. Both areas have sauna and a cold plunge. From the rotenburo you get an open view across the Tonami Plain (砺波平野) toward the Tateyama range. The hotel itself is a large Accor property, formerly known as Royal Hotel Toyama Tonami (ロイヤルホテル富山砺波) under the Daiwa Resort group, rebranded to the Mercure flag in recent years.
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Last updated September 19, 2026