Nao Igarashi with Blue Cat Cosplay Costume (Description + Photos)

Many people don't know what is cosplay? and i have the answer that i got from wikipedia.
Cosplay short for "costume play", is a type of performance art in which participants don costumes and accessories to represent a specific character or idea. Characters are often drawn from popular fiction in Japan, but recent trends have included American cartoons and science fiction.

Cosplay costume