Kimono (literally a thing to wear) is a traditional Japanese outfit, for women and men.
Kimono is rather a very formal clothing for special occasions, so you won’t see Japanese people wearing it everyday.
I was lucky to be in Japan during holidays, when many Japanese were wearing kimono. It was also great to observe weddings with all of these beautiful, traditional clothes. Moreover, I met a person fascinated with a Japanese culture who let us try kimono on; of course without her help I wouldn’t be able to “tied” it correctly (it’s like an art…).
I heard, there are also stores that offer renting a kimono, dressing you up with all make-up; I guess it also can be funny.