Original sentence: In addition, costumes which are worn without hesitation by Japanese cosplayers are avoided by Western cosplayers.In fact, most conventions ban cosplayers who purchase costumes from participating in contests or masquerade performances.Unlike in Japan, however, where most cosplayers purchase their costumes, it is more common in the West for costumes to be handmade by the costumer
Edited sentence: Costumes which are worn without hesitation by Japanese cosplayers are avoided by Western cosplayers