At the very beginning of the movie (where "My Generation" by "The Who" plays), when Shoya and his friends enter his mother's hairdresser salon, Nishimiya with long hair can be seen looking at a magazine about hairstyles in the salon. The next day when Nishimiya starts to Shoya's school, she has short, bob-cut hair.
At the beginning, the song "My Generation" written by Pete Townshend by The Who is played. Mr. Townshend is tone deaf in his left ear. Similar to the character Shoko Nishimiya in the movie who is deaf in both of her ears and has hearing aids to help her understand.