Rooms in traditional Japanese style are called Washitsu, comprise of Tatami mats spread on the floor and wood fittings that include Shoji and Fusuma.
Japanese style houses, Washitsu rooms and room size measurement, Living in Tokyo
Traditional Japanese-style tatami rooms
Traditional Japanese-style tatami rooms
Secrets Of Japanese Housing, Guide For Foreign Residents
An Easy Guide To 11 Japanese Rooms In The House, by Ling Learn Languages
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Washitsu-Tatami room-Japan Meditation room design, Japanese home
The Evolution of Tatami
How many rooms does an average Japanese house have? What are they used for (sleeping, eating, etc.)? Do most people live alone in their houses/apartments in Japan? - Quora
Japanese Apartment Layouts Guide - Tokyo Room Finder Blog
WASHITSU Kikuchi Japan
The Japanese House: The Basic Elements of Traditional Japanese Residential Architecture.
Traditional Japanese-style tatami rooms, tatami japones
Traditional Japanese Houses