I have absolutely no idea how long they've been making these calendars, but I'll add info as I find it.





2010-2011

• Apr-May Comchat Countdown (Sakurai Takahiro & Iguchi Yuuka)
• Jun-Jul Dear Girl Stories (Kamiya Hiroshi & Ono Daisuke)
• Aug-Sep Anispa! (Asano Masumi & Washizaki Takeshi)
• Oct-Nov Anigera! Didooooon!! (Sugita Tomokazu)
• Dec-Jan Dengeki Taishou (Suzuki Tatsuhisa & Akiyama Rina)
• Feb-Mar LIbrary Honban (Horiuchi Kenyuu & Goto Yuuko)

2009-2010

• Apr-May Dear Girl Stories (Kamiya Hiroshi & Ono Daisuke)
• Jun-Jul Cherry Bell (Sakurai Takahiro, Suzumura Kenichi, Matsuki Miyu)
• Aug-Sep Chikyuu Note (Noto Mamiko)
• Oct-Nov Denki Ningen Elpaso (Suwabe Junichi)
• Dec-Jan Ruby ni Kuchizuke (Seki Toshihiko & Morikubo Shoutarou)
• Feb-Mar Anispa! (Asano Masumi & Washizaki Takeshi)

2008-2009

• Apr-May Comchat Countdown (Sakurai Takahiro & Koshimizu Ami)
• Jun-Jul Tenshi no Tamago (Horie Yui)
• Aug-Sep Ai to Ryouko no Pajama Party (Shintani Ryouko & Shimizu Ai)
• Oct-Nov Dear Girl Stories (Kamiya Hiroshi & Ono Daisuke)
• Dec-Jan Voice of A&G Digital (Yoshino Hiroyuki)
• Feb-Mar Anispa! (Asano Masumi & Washizaki Takeshi)

2007-2008

Anispa, Comchat, Tenshi no Tamago, Poke Goe Fight (Paku Romi & Miyano Mamoru), Marunabi!?, Ai to Ryouko no Pajama Party

2006

Comchat Countdown (Sakurai Takahiro & Koshimizu Ami)
May-Jun (Kaneda Tomoko?)


2005

アニスパ、こむちゃ、ルビーに、めぐみゅう、アシタヘ、キャラメル


2004

• Jan-Feb Smile Gang (Mizuki Nana & Fukuen Misato)
• Mar-Apr Itazura Kuro-Usagi (Tamura Yukari)
• May-Jun Ruby ni Kuchizuke (Seki Toshihiko & Morikubo Shoutarou)
• Jul-Aug Dengeki Taisho (Matsukaze Masaya & Asano Masumi)
• Sep-Oct Caramel Heights (Inoue Kikuko)
• Nov-Dec Super Mobile Wave A/G Master (Sasaki Otacky, Toyoguchi Megumi & Yamamoto Maria); Comchat Countdown (Sakurai Takahiro & Ueda Kana)