Cosplay is the abbreviation of English costume drama, which refers to the use of clothing, ornaments, props and makeup to play the role of animation games and ancient characters. The narrow explanation is to imitate and dress up the role of the virtual world, which is called role-playing, so a new meaning is derived from the internet to describe people who pretend to be some people.

Moreover, it is difficult to define whether the coat doll you mentioned is cos, because according to cosplay, you are wearing the doll clothes of Pleasant Goat and Mickey Mouse, and Kumamon is only the mascot of Kumamoto Prefecture, not cos.