onsen

noun

on·​sen ˈȯn-ˌsen How to pronounce onsen (audio)
ˈän-
plural onsens or onsen
1
a
: a Japanese hot spring
When Japan began to modernize in the late 1800s, trains made it relatively easy for city dwellers to travel to the countryside, and traditional-style inns … sprang up around the onsenAndrew Curry
b
: a traditionally Japanese resort or hotel with hot springs
2
: a Japanese bath in which bathers soak in a hot spring or hot-spring fed bath after first cleansing with a shower
The Japanese tradition of onsen (public baths) is high on the list of après-ski activities in Niseko [Japan].Jenny Hewett
also : a bathhouse or room used for such a bath

Examples of onsen in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Washing your body thoroughly before stepping into an onsen is essential. Catherine Heald, Travel + Leisure, 22 June 2026 Sleek rooms were designed by Andre Fu, there’s a central courtyard garden that pivots around a huge cherry tree, and expansive hot spring onsen pools in the basement. Condé Nast, Condé Nast Traveler, 2 June 2026 The Blakiston’s fish owl is the rarest owl in Japan but often visits the Yoroushi onsen in the evening. Catherine Garcia, TheWeek, 27 May 2026 The complex includes a thermal spring garden with daybeds, two private onsen bathing pavilions, an Aqua Movement Suite for water treatments and a hydrotherapy area with a dry sauna and steam room. Hanna Wickes, Sacbee.com, 9 May 2026 Ancient societies have long regarded the element as a form of holistic medicine for their well-being, as seen in Roman thermal baths and Japanese onsens. Kathleen Wong, USA Today, 30 Apr. 2026

Word History

Etymology

borrowed from Japanese, from on "warm" + sen "spring, fountain"

First Known Use

1896, in the meaning defined at sense 1

Time Traveler
The first known use of onsen was in 1896

Browse Nearby Words

Cite this Entry

“Onsen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onsen. Accessed 5 Jul. 2026.

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