Rooms in traditional Japanese style are called Washitsu, comprise of Tatami mats spread on the floor and wood fittings that include Shoji and Fusuma.
Introduction to Japanese-style room “washitsu” at onsen ryokans, SELECTED ONSEN RYOKAN
Japanese style houses, Washitsu rooms and room size measurement, Living in Tokyo
Tatami rooms hi-res stock photography and images - Alamy
Housing in Japan - Wikipedia
Japanese style houses, Washitsu rooms and room size measurement, Living in Tokyo
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Japanese Apartment Layouts: Japanese Apartment 101 Guides - Blog
Japanese House Words and Vocabulary
WASHITSU Kikuchi Japan