Because women wear shimada-mage when they are single and marumage after their marriage, the heroine of the opera 'Madama Butterfly' has to change her hairstyle during the performance if she is to be faithful to Japanese customs (the heroine who was geisha [Japanese professional female entertainer at drinking party] in Nagasaki gets married at the beginning of the play); so that two kinds of wigs are sometimes prepared.
未婚時代には島田髷が結われるのに対して、結婚すると丸髷に変わるので、オペラ「蝶々夫人」を日本の風俗に忠実に演ずる場合は（長崎の芸者だったヒロインが冒頭で結婚するため）途中で髪形を変えねばならずカツラを二種類用意することがある。