URLs

• https://ja.wikipedia.org/wiki/平山英嗣
• https://anidb.net/creator/6610
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=12533
• https://www7.atwiki.jp/anime_wiki/pages/657.html
• https://www18.atwiki.jp/sakuga/pages/990.html