URLs

• https://www.pixiv.net/users/8019142
• https://www.pixiv.net/stacc/eisaku11
• https://twitter.com/EISAKUSAKU
• https://twitter.com/intent/user?user_id=123579205
• https://wmwwxj3z.fanbox.cc
• https://www.instagram.com/eisaku_kubonouchi/
• http://www.amazon.co.jp/窪之内-英策/e/B004L4LXBG/
• http://www.mangaupdates.com/authors.html?id=1107
• http://en.wikipedia.org/wiki/Eisaku_Kubonouchi
• http://ja.wikipedia.org/wiki/窪之内英策
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=66237
• http://p.twipple.jp/user/eisakusaku