Japanese Robe and Belt: "Yukata" and "Obi"

The yukata is a warm weather robe, typically made from cotton. The yukata is a Japanese summer kimono worn by both men and women. The name yukata comes from the word "yu" (bath) and "katabira" (under clothing ).

Thousands of years ago, Court Nobles wore linen "yukatabira" which were draped loosely after taking a bath. It gradually became worn by Japanese warriors and then by the general public when the sophisticated Japanese public bath became popular.

Today, the traditional Japanese yukata is widely used for everything from festivals, ryokan, summer daily wear to simple night attire. In Japan, the yukata is the most popular daily clothing wear and is beloved for its lightweight cotton fabric.

The fabric designs vary from the traditional plain cross hatch pattern to more colorful scenery designs. For normal daily or night attire, just the cotton sash is used. For festivals and public occasions, a larger wider yukata belt as shown in the picture is worn for a more formal appearance. The belt is simply wrapped around the waist and tucked in at the edge. An obi belt can also be worn with the cotton yukata.
Source:
https://en.wikipedia.org/wiki/Yukata