Menmentei Wataya
めんめん亭わたや
Small Iwamuro Onsen ryokan with a fifth-floor open-air bath
Lodging
Bathing & Water
Outdoor BathYes
Open-air outdoor bath
Bathing Arrangements
Room OnsenYes
Private onsen bath in guest rooms, for overnight guests only
Mixed BathingNo
Shared bathing area for all genders
Views
MountainsAbout
A small ryokan in Iwamuro Onsen, Niigata. The main bath is a rotenburo (open-air bath) on the fifth floor of the main building, looking out toward Mt. Matsudake, known locally as Iwamuro Fuji, and Mt. Tahozan. The view changes with the seasons. Some guest rooms have their own indoor bath, including a cypress one in room Taho 101. The inn calls its water "tsuyahada no yu" (the glowing-skin bath), and it shares a source with its sister day-use bath, Dairo no Yu.
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Last updated October 13, 2026