URLs

• https://www.doujinshi.org/browse/author/22550/Yamashita-Akihiko/
• https://en.wikipedia.org/wiki/Akihiko_Yamashita
• https://ja.wikipedia.org/wiki/山下明彦
• https://anidb.net/creator/5873
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=595
• https://www7.atwiki.jp/anime_wiki/pages/790.html
• https://www18.atwiki.jp/sakuga/pages/425.html
• http://studio-ghibli.wikia.com/wiki/Akihiko_Yamashita