As the art of cosplay steadily proliferates into the culture of Japan, even traditionally stodgy institutions like universities have begun accepting it at their graduations. So it would seem obvious that more “carefree” places like theme parks would embrace the costumed fun.
Tokyo Disneyland had their own cosplay event and Universal Studios Japan makes provisions for it in their park rules and regulations. Still, with these companies and others protecting their own brand interests there’s bound to be some lines one shouldn’t cross when trying to gain entrance in costume. But with no official bans on dressing up like certain characters it’s up to Twitter users to test the waters and find where these parks draw the line.