Ryokan

ryokan is a type of traditional Japanese inn that has existed since the eighth century. Guest rooms are constructed using traditional Japanese methods: flooring is tatami and doors are sliding doors. Almost all ryokan feature common bathing areas or ofuro, usually segregated by gender.
Typically ryokan provide guests with a yukata (the Japanese casual kimono) to wear. 
Bedding is a futon spread out on the tatami floor.
When guests first enter their room, they usually find a table and some supplies for making tea.

Ryokan: A Traditional Japanese Inn Experience.
Ryokan are traditional Japanese inns that offer a unique and unforgettable experience. They are characterized by their traditional Japanese decor, hospitality, and cuisine.
Ryokan have been around for centuries, and they are still a popular choice for travelers who want to experience Japanese culture. They are found all over Japan, from major cities to rural villages.
When you stay at a ryokan, you can expect the following:
Traditional Japanese decor: Ryokan are typically decorated with tatami mats, sliding doors, and other traditional Japanese furnishings.
Omotenashi: Omotenashi is the Japanese concept of hospitality. It is characterized by a focus on the guest's needs and comfort.
Kaiseki cuisine: Kaiseki is a traditional Japanese multi-course meal that is often served at ryokan. It is typically made with fresh, seasonal ingredients.
There are many different types of ryokan, ranging from small, family-run establishments to large, luxury hotels. 
Some ryokan are located in hot springs (onsen), which offer guests the opportunity to relax and rejuvenate.