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Hokkaido · Onsen area

Iwao Onsen

いわおおんせん · 岩尾温泉

Hokkaido · 増毛郡増毛町

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Official classification

Spring type (therapeutic classes)

Official spring-type name (as recorded)単純酸性泉

Source temperature
14°C
pH
3.5
Flow rate
140 L/min
Radon
Unconfirmed

Appearance & feel

Water colour · Feel

Clear

Colour and feel are listed only where a source states them. They vary by day and by bath.

This area has basic information only. In-depth articles are being added.

Facilities in this area

Facilities come from the register (Wikipedia, OpenStreetMap, official sites). Those marked "natural spring unconfirmed" are listed on the basis of their name only.

No facility information yet.

Getting there

Reachable by public transport

留萌駅から沿岸バス「岩尾港」下車、札幌から国道231号で約2時間

Checked
no check date

Visitor reviews

No reviews yet. While the review platform is being prepared, we do not display fictional reviews or ratings.

Review posting is in preparation, with visit date, facility, comments on water, scenery and access, photos, language and reporting.

Register sources

Data status

Name & locationPublishedCoordinatesPublishedSpring typePublishedPhotosPublishedFacilitiesIn preparationVisiting info (dated)In preparationEditorial articleIn preparation

Updated 2026-10-09

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