Title A

Japanese: A-ZERO (アクションゼロ)
Size: B5
Cost: 390 yen
Release Date: Monthly; 7th
Circulation: 2008/07 - 2009/06
Publisher: Futabasha
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Info:
A special issue of Manga Action magazine. Its first issue (No.001) was released on July 7th, 2008, and its last issue (No.012) was released on June 6th, 2009. Manga serialized in this magazine were published in tankoubon form under the Action Comics imprint.
Japanese: アリア
Size: B5
Release Date: Monthly; 28th
Circulation: 2010/07 - ?
Publisher: Kodansha
Links:
ARIA Editorial Department BLOG
Info:
The concept of the magazine is amazing/fantastic quality. Its slogan is the "extraordinary girls comic" which mainly serializes shoujo manga that contain fantasy element which do not fit into the romance framework. The magazine serializes various genres: fantasy, horror, sci-fi, sengoku (warring states), and extraordinary romance manga. The magazine is aimed at females between 16 to 22 years old. Its first issue was released on July 28th, 2010.

Japanese: アックス
Cost: 933 yen
Release Date: Bi-monthly
Publisher: Seirinkogeisha
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Info:
Alternative manga magazine.

Japanese: アイラ
Cost: 580 yen
Circulation: No.1 - 21
Publisher: Sanwa Shuppan
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Info:
Written on the cover: "HARD & DEEP SUPER HEAVEN'S COMIX".

Japanese: アイラデラックス
Cost: 940 yen
Publisher: Sanwa Shuppan
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Info:
Written on the cover: "DEEP & HARD SUPER HEAVEN'S COMIX. KING ECSTASY FOR YOU."

Japanese: アブラカダブラ
Cost: 650 yen
Circulation: 2006/09
Publisher: Kodansha
Info:
A special issue of Comic Bon Bon. It was released on 9/29, the magazine contains a preview "chapter 0" of the "Negima!? neo" manga, which was set to start in the November issue of Comic Bon Bon. Mainly the fantasy work were published.

Japanese: エース桃組
Cost: 680 yen
Release Date: Seaonal; 6th
Circulation: 2000/09 - 2004/12
Publisher: Kadokawa Shoten
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Info:
A special issue of Shounen Ace magazine.

Japanese: エース特濃
Cost: 680 yen
Release Date: Bi-monthly (odd)
Circulation: 2003/03 - 2004/07
Publisher: Kadokawa Shoten
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Info:
A special issue of Shounen Ace magazine. A total of 9 issues were released. The magazine was succeeded by Comic Shin-Genjitsu.

Japanese: アクションピザッツ
Size: B5
Release Date: Monthly; 21st
Circulation: 1991/09 - ?
Publisher: Futabasha
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Info:
A renewal of "Action Character" (アクションキャラクター) magazine. It started in September 1991 as a bi-weekly publication (published on the 1st & 3rd Wednesday). On April 2008 the magazine was renewed with its publication changed to a monthly basis (on the 21st).
Japanese: アクションピザッツDX
Release Date: Monthly; 7th
Circulation: 2008/04 - ?
Publisher: Futabasha
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Japanese: アクションピザッツ スペシャル (アクションピザッツSP)
Release Date: Monthly; 28th
Publisher: Futabasha
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Info:
Action Pizazz's special issue. Used to be published on a bi-monthly basis (on the 28th of odd months). Starting from the July 2009 issue (released on May 28th, 2009) it became a monthly publication.

Japanese: 月刊アフタヌーン
Cost: 650 yen
Release Date: Monthly; 25th
Circulation: 1996 - ?
Publisher: Kodansha
Links:
Serialization:
Publisher: Kodansha

Japanese: 愛の体験スペシャルデラックス
Cost: 610 yen
Release Date: Monthly; 28th
Publisher: Take Shobo
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Japanese: 赤マルジャンプ
Release Date: 3 times a year; Golden Week, Bon Festival, New Year's holiday
Circulation: 1996 - ?
Publisher: Shueisha
Info:
A special issue of Weekly Shounen Jump. The magazine started in 1996 with its title being "Akamaru Jump" (赤マルジャンプ). The title of the magazine was changed to "Shounen Jump NEXT!" (少年ジャンプNEXT!) with the release of the April 30th, 2010 issue. It mainly serializes one-shot manga by new manga authors.
Japanese: AKITA TOP COMICS
Cost: 400 - 600 yen
Release Date: Monthly; 27th
Publisher: Akita Shoten
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Info:
Black Jack, Dogeben Famous Competition Stories and Kuroozu
Publisher: Shinchosha
Japanese: アメコミ新潮
Publisher: Shinchosha
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Info:
All these are Mooks (magazine books) of American comics in Japanese.
Japanese: 姉系プチコミック (姉系Petit Comic)
Size: A5
Circulation: 2010/05 - ?
Publisher: Shogakukan
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Info:
A special issue and a sister magazine of Petit Comic magazine. The magazine is abbreviated as "Ane Petit ♥" (姉プチ♥), and is aimed at women around 30 years old. The concept of the magazine is "shoujo manga magazine for women in their thirties". Its first issue was released on May 21st, 2010.

Japanese: ANGEL (エンジェル) 倶楽部
Cost: 650 yen
Release Date: Monthly; 30th
Publisher: Angel Shuppan
Info:
"Super bishoujo comic magazine," serializes adult manga.

Japanese: アニコレドラゴン
Cost: 680 yen
Circulation: 2004/10 - ?
Publisher: Fujimi Shobo
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Info:
DRAGON AGE special issue. Anime and goods magazine.

Japanese: アニメージュ
Cost: 620 yen
Release Date: Monthly; 10th
Circulation: 1978/05 - ?
Publisher: Tokuma Shoten
Links:
Official Site 1
Official Site 2
Info:
Anime information magazine.
Japanese: アニメージュオリジナル
Circulation: 2008/07 - ?
Publisher: Tokuma Shoten
Info:
Anime information magazine for adults. First issue was released on July 28th, 2008.

Japanese: アニメディア
Cost: 450 yen
Release Date: Monthly; 10th
Publisher: Gakken Publishing
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Info:
Anime information magazine.
Japanese: アオハル
Size: A5
Circulation: 2010/11 - ?
Publisher: Shueisha
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Info:
A special issue of Weekly Young Jump. "Youth and Heroine" is the theme of the magazine. Its first issue was released on November 30th, 2010.
Japanese: アクアBLキングダム
Publisher: Dream Maker
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Info:
BL manga magazine for cellular phones.

Japanese: 月刊 荒くれKNIGHTマガジン
Cost: 380 yen
Release Date: Monthly
Circulation: 2006/01 - 2006/11
Publisher: Shounen Gahosha
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Info:
Young King special issue.

Japanese: 月刊 ASUKA (あすか)
Cost: 420
Release Date: Monthly; 22nd
Circulation: 1985 - ?
Publisher: Kadokawa Shoten
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Japanese: シエル
Cost: 620 yen
Release Date: Bi-monthly (odd); 30th
Circulation: 1994 - ?
Publisher: Kadokawa Shoten
Links:
Kadokawa Shoten's magazine page
Info:
Serailizes BL manga.

Japanese: Asuka plus macbeth
Size: A4
Cost: 680 yen
Circulation: 2005/05 - 2005/08
Publisher: Kadokawa Shoten
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Info:
Published by Kadokawa Shoten in associate with Animate, a franchised anime & manga shop found throughout Japan. Animate's strength lies in their exclusive goods they sell, but this time they wanted to distribute the new magazine not only at their shops but also ordinary bookstores, so Kadokawa (publisher of Asuka) decided to help with manga artists and circulations. A total of 4 issues were released.
Japanese: 妖(あやかし)
Size: A5
Cost: 570 yen
Release Date: Quarterly
Circulation: 2007/05 - ?
Publisher: Asahi Sonorama
Info:
Nemuki special issue.