Jump Square

Jump Square (ジャンプスクエア) is a Japanese monthly shōnen manga magazine with a circulation of over 500,000. Published by Shueisha, the magazine premiered on November 2, 2007 as a replacement for Monthly Shōnen Jump, another manga anthology that Shueisha discontinued in June. The magazine is a part of the Jump line of magazines The manga titles serialized in the magazine are also published in tankōbon volumes under the Jump Comics label.

History
Jump Square, also called Jump SQ., was created as a replacement for Shueisha's canceled Monthly Shōnen Jump manga anthology. The title has three stated meanings: public square ("a plaza where comic lovers and talented artists and writers come together"), algebraic square (Weekly Shōnen Jump²), and "SQ. = Supreme Quality" (referring to its "Supreme Quality Manga Magazine" motto). Four manga tiles being serialized in Monthly Shōnen Jump when it was canceled were temporarily moved to Weekly Shōnen Jump, until Jump Square's release. These four series, Tegami Bachi, Rosario + Vampire, Claymore, and Gag Manga Biyori were among the magazine's premiere series, along with debuting series, including Embalming -The Another Tale of Frankenstein-, Kure-nai, and Dragonaut -The Resonance-.

Circulation
When Jump Square was launched, the initial printing of 500,000 copies quickly sold out. Over 70% of the copies released across Japan sold out within the first three days. Shueisha printed an additional 100,000 copies to help meet the demand, something normally not necessary with Japanese magazines. The second issue also sold well, requiring a second printing of 60,000 copies.

Features
Jump Square's primary content is the chapters of the manga titles currently being serialized within it. In addition to the regular, on-going manga series, some issues include serialized light novel chapters from works published by the Jump j-Books label. One-shots from established manga writers are featured in a section of the magazine called the "Supreme Yomikiri Series" (SUPREME読切シリーズ), while one-shots from new, upcoming writers occasionally appear in the "Explosive Yomikiri Series" (Explosive読切シリーズ) section.

Light Novels
Jump j-Books (JUMP j-BOOKS) light novels are also serialized near the end of Jump SQ.

Jump SQ. II (Second)
Jump SQ. II (Second) (ジャンプSQ.II) short for Jump Square Second (ジャンプスクエアセカンド), is a spin-off issue of Jump SQ. of which three volumes have currently been published, and its first publication was on April 18, 2008. The first issue featured a then-one-shot collaboration between the world-famous American comic writer Stan Lee and Shaman King's Hiroyuki Takei, called Karakuridōji Ultimo (using the Marvel Method). A contest organized by Shonen Jump (a monthly English version of Weekly Shōnen Jump) partnered with Jump SQ., Stan Lee and Hiroyuki Takei signed a Jump SQ. II (Second) issue and handed it out to the random winner at the 2008 New York Comic Con. Three regulars: Sekai no Chūshin de Taiyō ni Hoeru, Tsumikabatsu, and Mahō no Ryōri Chaos Kitchen; were put in the SQ. II magazine as their own SQ. II exclusive one-shot, along with other one-shots like Missing Battery, Cross, or Alone Again. The success of Ultimo led to the extra mini book named The Man Who Created "Spider-Man" and the "X-Men" - Stan Lee the book! (｢スパイダーマン｣｢X-MEN｣を作つた男 スタン·リー the Book!) which is completely based on Stan Lee's American comics, mostly Amazing Fantasy (introduced first Spider-Man comic), Spider-Man, Iron Man, and The Hulk. The mini book also tells of many Spider-Man merchandise such as the box set of all three movies: Spider-Man, Spider-Man 2, and Spider-Man 3., translated into Japanese.

Jump SQ.19
Jump SQ.19 (ジャンプSQ.19) is a spin-off issue of Jump SQ., and its first publication is on May 19th, 2010. It includes one shots and spin offs, similar to Jump SQ. II, and there is also a series that only serializes in Jump SQ.19. It is scheduled to release 19th of every February, May, August, and November.