Until the Kimono takes root
From the Nara period until then, it was common for the Japanese to wear a separate upper and lower garment (trousers or skirt) or a one-piece dress. In the Heian period (794-1192), however, a new way of making the kimono was developed. It is called the linear cutting method, in which the fabric is cut straight and sewn together. This made it unnecessary to worry about the shape of the body of the wearer of the kimono.
There are many advantages to the straight-cut kimono. It is easy to fold. They are also unaffected by the weather. In winter, the kimono was comfortable to wear in layers for warmth, and in summer, the kimono was made of a breathable fabric such as hemp. These advantages made the kimono a part of the daily life of the Japanese.