URLs

• https://www.pixiv.net/users/227168
• https://www.pixiv.net/stacc/cotetsu-yamanaka
• https://x.com/cotecote_sun
• https://x.com/i/user/158126351
• https://n974vv57.fanbox.cc
• https://www.pixiv.net/fanbox/creator/227168
• https://sketch.pixiv.net/@cotetsu-yamanaka
• https://www.facebook.com/cotetsu.yamanaka
• https://www.facebook.com/profile.php?id=100001547602449
• https://www.melonbooks.co.jp/circle/index.php?circle_id=32515
• https://ec.toranoana.jp/tora_r/ec/cot/circle/2UPAE26Q847KdC6Sd687/all
• https://anidb.net/creator/49580
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=200191
• http://www.cotetsu.org
• https://store.line.me/stickershop/author/1402329
• https://www.mobygames.com/person/857979
• https://myanimelist.net/people/28599
• https://vndb.org/s26481
• http://www.amazon.co.jp/s/search-alias=books-jp&field-author=山中+虎鉄
• http://drawr.net/cotetsu-yamanaka