URLs

• https://www.pixiv.net/users/13640964
• https://www.pixiv.net/stacc/hiro_kashiwagi
• https://twitter.com/hirokawa0
• https://twitter.com/intent/user?user_id=2358278358
• https://sketch.pixiv.net/@hiro_kashiwagi
• https://www.mangaupdates.com/author/7de74cz
• https://www2u.biglobe.ne.jp/~hiromu/
• https://myanimelist.net/people/2600