Cosplay is an activity in which people enjoy wearing costumes and putting on makeup to imitate modern characters from animation, games and manga.
It was spread from Japan to many countries, because Japanese "otaku" culture, animations, mangas and computer games were very popular.
You know there are events to wear a disguise such as Halloween and the Carnival of Venice as well.
I think people have a desire to try to be an another someone different.

World cosplay summit will be held from JUly 28 to Aug. 5 around Nagoya.