Question: Hiroshi Gamo is known for his works in a magazine published in Japan by who?
Context: Hiroshi Kikuchi (菊池 寛 , Kikuchi Hiroshi , December 26, 1888 – March 6, 1948) , known by his pen name Kan Kikuchi (which uses the same kanji as his real name), was a Japanese author born in Takamatsu, Kagawa Prefecture, Japan.  He established the publishing company Bungeishunjū, the monthly magazine of the same name, the Japan Writer's Association and both the Akutagawa and Naoki Prize for popular literature.  He came to prominence for the plays "Madame Pearl" and "Father Returns", but his ample support for the Imperial Japanese war effort led to his marginalization in the postwar period.  He was also the head of Daiei Motion Picture Company (currently Kadokawa Pictures).  He is known to have been an avid player of Mahjong. Dengeki Bunko Magazine (電撃文庫MAGAZINE ) is a Japanese light novel magazine published by ASCII Media Works (formerly MediaWorks).  The magazine succeeded the light novel magazine "Dengeki hp", and originally was published as a special edition issue of "Dengeki Daioh" for the first two issues; the first issue was released on December 10, 2007.  "Dengeki Bunko Magazine" became an independent magazine with the publication of its third volume on April 10, 2008.  The magazine publishes information pertaining to ASCII Media Works' light novel publishing label "Dengeki Bunko", along with short stories written by already established authors who have had previous light novels published under "Dengeki Bunko".  Other information pertains to adaptations from the light novels, such as video games, anime, or manga. Hiroshi Gamo (ガモウひろし , Gamō Hiroshi , born August 17, 1962) is a Japanese manga artist known for his works in the magazine "Weekly Shōnen Jump".  His most famous work is the gag manga series "Tottemo!  Luckyman". Hiroshi Hirata (平田 弘史 , Hirata Hiroshi , born February 9, 1937, Japan) is a Japanese manga artist best known in the United States for the samurai manga series "Satsuma Gishiden", which is published in the United States by Dark Horse Comics.  Hirata's works belong to the subset of manga known as "gekiga" ("dramatic pictures"), and his artwork has a realistic style comparable to Goseki Kojima's work on "Lone Wolf and Cub".  He's also known for his use of elaborate calligraphy for dialogue (he did the kanji for Akira), which has been preserved (though still translated) in the American editions of his work. Hiroshi Mihara (三原 弘嗣 , Mihara Hiroshi , born October 20, 1983) is a Japanese professional wrestler, better known by the ring name Hiroshi Yamato (大和　ヒロシ , Yamato Hiroshi ) .  Trained by the All Japan Pro Wrestling promotion, he started his career in February 2007 working in Mexico for the International Wrestling Revolution Group (IWRG) promotion, where he won the 2007 Rey del Ring tournament.  Yamato returned to Japan and his home promotion in February 2008 and during the next five years went on to become a one-time World Junior Heavyweight and All Asia Tag Team Champion and the winner of the 2012 Junior Hyper League.  In June 2013, Yamato left All Japan in a mass exodus to join the new Wrestle-1 promotion.  In January 2016, Yamato won the Wrestle-1 Cruiser Division Championship.  Yamato also works as a trainer and sales manager for Wrestle-1. Yasunori Katō (加藤 保憲 , Katō Yasunori ) is a fictional character, the protagonist of the Japanese historical fantasy series "Teito Monogatari", created by Hiroshi Aramata.  He first appeared in a 1983 issue of a science fiction magazine published by Kadokawa Shoten but gained more widespread attention with successive publications as well as his , and has since gone on to be referenced frequently in Japanese popular culture.  His character is generally associated with onmyodo mysticism since "Teito Monogatari" was the first major novel to popularize the art in Japanese fiction. Manga Life (まんがライフ , Manga Raifu ) is a manga magazine published monthly by Takeshobo in Japan since the November 1984 issue (published in October 1984).  Its original title was Gag da (ギャグダ , Gyagu da ) , and the change to "Manga Life" was made to better compete with "Manga Time", a rival magazine published by Houbunsha.  Most of the series appearing in the magazine use the yonkoma format.  The magazine is released monthly on the 17th, though it sometimes appears on shelves slightly before or after that, depending on speed of actual distribution.  "Manga Life" is published in B5 size, and its Japanese magazine code is 18635. Sylph (シルフ , Shirufu ) is a Japanese shōjo manga magazine published by ASCII Media Works (formerly MediaWorks) and is sold monthly.  The magazine was originally published on December 9, 2006 as a special edition version of MediaWorks' now-defunct "Dengeki Comic Gao! " under the title "Comic Sylph" (コミックシルフ , Komikku Shirufu , normally written as "comic SYLPH") as a quarterly publication.  On March 21, 2008, with the release of the sixth volume, the magazine was transferred over as a special edition version of ASCII Media Works' shōnen manga magazine "Dengeki Daioh".  On May 22, 2008, the magazine became independent of "Dengeki Daioh" and was published as volume one of "Sylph" as the July 2008 issue as a bimonthly publication.  On May 22, 2010, the magazine started to be published monthly.  "Sylph" is one of the few magazines originally published by MediaWorks not under the "Dengeki" naming line, such as with "Dengeki Daioh", and "Dengeki G's Magazine", the first of which being "Active Japan" in 1995 which has been discontinued since 1998. Hiroshi Shiibashi (椎橋寛 , Shībashi Hiroshi , born June 6, 1980, Suita, Osaka, Japan) is a Japanese manga artist known for the manga "", which has been adapted into an anime series.  He has worked as an assistant on Hirohiko Araki's series "Steel Ball Run".  On Nikkei Entertainment's list published in 2011 of most successful manga artists by sales since 2010 he ranked tenth. Weekly Shōnen Jump (Japanese: 週刊少年ジャンプ , Hepburn: Shūkan Shōnen Janpu , stylized in English as "WEEKLY JUMP") is a weekly "shōnen" manga anthology published in Japan by Shueisha under the "Jump" line of magazines.  It is the best-selling manga magazine, as well as one of the longest-running; the first issue was released with a cover date of August 1, 1968.  The manga series within the magazine target young male readers and tend to consist of a large number of action scenes and a fair amount of comedy.  The chapters of series that run in "Weekly Shōnen Jump" are collected and published in "tankōbon" volumes under the "Jump Comics" imprint every two to three months.
Answer: Shueisha