URLs

• https://ja.wikipedia.org/wiki/柳田義明
• https://anidb.net/creator/4233
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=62
• https://w.atwiki.jp/anime_wiki/pages/514.html
• https://w.atwiki.jp/sakuga/pages/225.html
• https://myanimelist.net/people/10150