Rooms in traditional Japanese style are called Washitsu, comprise of Tatami mats spread on the floor and wood fittings that include Shoji and Fusuma.
Traditional Japanese-Style Bedroom Designs & Ideas for Minimalists
ROOMS, POSSESSIONS, AND APPLIANCES IN JAPAN
Traditional Japanese-style tatami rooms, tatami japones
Traditional Japanese-style tatami rooms
The Japanese House: The Basic Elements of Traditional Japanese Residential Architecture.
Tatami Room: The Heart Of Japanese Contemporary Home - Savvy Tokyo
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Kashiwaya Ryokan's Japanese Style Rooms and What They Offer
Traditional Japanese-style rooms (washitsu) come with a unique interior design that includes tatami mats as flooring. An example from an Onsen (Hot Springs) Hotel. This style dates back to the Muromachi Period