Where is that line drawn? Do we end up banning all costumes? Are construction worker costumes banned because a hard hat and yellow vest aren't toys, they're important pieces of safety equipment that can save a person's life. They shouldn't be trivialized. Do we ban cowboy costumes, because western expansion was an important part of the early and mid 1800s expansion and continues to be both a modern career and a source for rodeo cultures? Here's the line I see: a non-Japanese person wearing a kimono to a costume party isn't worth criticism. But someone wearing a kimono to a costume party and playing up Asian stereotypes and using their fingers to make their eyes look slanty is worthy of criticism. But even that has nothing to do with cultural appropriation and everything to do with the person being a racist jerk.Wearing a costume kimono? No Bueno. someone else's historical daily culture, and to an extent their current culture isn't a costume.