There are many different types of kimono depending upon the person (i.e. a maiko has different dress to a geiko (geisha)) or occasion (marriage, holidays/festivals, the birth of a child). Kimonos (strictly speaking) are usually thicker, much more traditional and more expensive garments, however other kimono-like clothing pieces exist such as the yukata.
"A yukata is a Japanese garment, a casual summer kimono usually made of cotton or synthetic fabric, and unlined. Yukata are worn by men and women. Like other forms of traditional Japanese clothing, yukata are made with straight seams and wide sleeves." (https://en.wikipedia.org/wiki/Yukata)
Further information: http://www.fromjapan.co.jp/blog/en/fashion/all-about-kimono-and-yukata-the-differences-how-to-wear-buy.html
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