Monthly Shōnen Sunday

Monthly Shōnen Sunday (月刊少年サンデー), alternately known as Gessan (ゲッサン) (a portmanteau of "Gekkan" and "Sandē" from its full Japanese title), is a monthly shōnen manga magazine published in Japan by Shogakukan since May 12, 2009 (the June 2009 issue). The magazine was announced in February 2009, with Hayashi Masato, at that time editor of Weekly Shōnen Sunday, editing the monthly magazine as well. Manga artists who debuted new series or stories in the magazine include Yellow Tanabe, Mitsuru Adachi, and Kiyohiko Azuma.

Series
There are 26 manga series being serialized in Monthly Shōnen Sunday.

2009

 * Azumanga Daioh: Supplementary Lessons (あずまんが大王・補習編) by Kiyohiko Azuma (June–August 2009)
 * Daisan Sekai no Nagai (第三世界の長井) by Ken Nagai (June 2009–January 2019)
 * Gakushin Ou - Vero Musica (楽神王 〜vero musica〜) by Masanori Yoshida (June 2009–December 2010)
 * Kenryoku no Inu Police Wan! (権力の犬、ポリスワン!) by Pero Sugimoto (June 2009–April 2010)
 * Lindbergh (リンドバーグ) by Ahndongshik (June 2009–May 2013)
 * Makoto no Ōja: Real Deal Champion (マコトの王者 〜REAL DEAL CHAMPION〜) by Ashibi Fukui (June 2009–November 2011)
 * Manekoi (まねこい) by Taishi Mori (June 2009–March 2012)
 * Q and A (QあんどA) by Mitsuru Adachi (June 2009–April 2012)
 * Shinobi no Kuni (忍びの国) by Ryō Wada (story) and Mutsumi Banno (art) (June 2009–March 2011)
 * The!! Beach Stars (ザ!! ビーチスターズ) by Masahiro Morio (June 2009–May 2010) (moved from Weekly Young Sunday)
 * Tsuki no Hebi: Suikoden Ibun (月の蛇 〜水滸伝異聞〜) by Hiroo Nakamichi (June 2009–February 2012)
 * Welcome to the El-Palacio (ここが噂のエル・パラシオ) by Takao Aoyagi (June 2009–September 2013)
 * Yoshitō-sama! (よしとおさま!) by Haruka Shii (June 2009–August 2015)
 * Yvonne to Asobou! (イボンヌと遊ぼう!) by Tomoyuki Arai (June 2009–November 2011)
 * Hallelujah Overdrive! (ハレルヤオーバードライブ!) by Kōtarō Takata (July 2009–November 2015)
 * Itsuka Omae to Jiruba o (いつかおまえとジルバを) by Yūji Yokoyama (August 2009–August 2011)
 * Number One Kaidoh (No.1海童) by Amiya Harumi (August 2009–May 2010)
 * Toaru Hikūshi e no Tsuioku (とある飛空士への追憶) by Koroku Inumura (story) and Maiko Ogawa (art) (September 2009–March 2011)

2010–2014

 * Idol Ace (アイドルA(エース)) by Mitsuru Adachi (November 2010–August 2011) (moved from Weekly Young Sunday)
 * After School Dice Club (放課後さいころ倶楽部) by Hirō Nakamichi (April 2013–July 2021)
 * Fudatsuki no Kyōko-chan (ふだつきのキョーコちゃん) by Sōichirō Yamamoto (September 2013–July 2016)
 * Les Misérables by Victor Hugo (original novel) and Takahiro Arai (October 2013–June 2016)
 * The Idolmaster Million Live! (アイドルマスター ミリオンライブ!) by Yuki Monji and Bandai Namco Entertainment (August 2014–October 2016)

2015–2019

 * Renjoh Desperado (恋情デスペラード) by Ahndongshik (June 2015–May 2018)
 * Misoshiru de Kanpai! (味噌汁でカンパイ!) by Sai Sasano (July 2015–October 2022)
 * Kaiō Dante (海王ダンテ) by Fukurō Izumi and Ryōji Minagawa (January 2016–September 2021)
 * Teasing Master Takagi-san (からかい上手の高木さん) by Sōichirō Yamamoto (August 2016–November 2023) (moved from Monthly Shōnen Sunday Mini)
 * Re:Creators One More!'' (Re:CREATORS わんもあ！) by Yūki Kumagai (July–December 2017)
 * Koi ni Koisuru Yukari-chan (恋に恋するユカリちゃん) by Sōichirō Yamamoto (original story) and Yūma Suzu (August 2017–May 2020)
 * Kongōji-san wa Mendōkusai (金剛寺さんは面倒臭い) by Minoru Toyoda (October 2017–August 2020)
 * Dorohedoro (ドロヘドロ) by Q Hayashida (December 2017–October 2018) (moved from Hibana)
 * In the Heart of Kunoichi Tsubaki (くノ一ツバキの胸の内) by Sōichirō Yamamoto (February 2018–June 2023)
 * Sensei wa Koi wo Oshie Rarenai (先生は恋を教えられない) by Motomi Minamoto (July 2018–July 2022)
 * Bomba Boy (ボンバボーイ) by Seto Mikumo (September 2018–October 2020)
 * Sekai Aruiteru to Dopuna Hito ni Kara Mareru (世界歩いてるとドープな人にカラまれる) by Goka Yajin (November 2018–January 2021)
 * Koroshiya S no Yuragi (殺し屋Sのゆらぎ) by Erika Funamoto (January 2019–April 2021)
 * Pseudo Harem (疑似ハーレム) by Yū Saitō (February 2019–April 2021)
 * School × Tukuru (スクール×ツクール) by Riki Taoka (story) and wogura (art) (May 2019–November 2021)
 * Bowing! (ボウイング) by Kyukyupon (October 2019–October 2022)
 * Kowamote Sensei no Oshinagaki (怖面先生のおしながき) by Ryota Akisawa (October 2019–July 2021)

2020–present

 * Tenohira Sōseiki (てのひら創世記) by Maiko Ogawa (January 2020–October 2022)
 * Yōkina Shimerike (陽気なしめりけ) by Ogi Suzuhito (February 2020–November 2023)
 * Utakata no Minato (ウタカタノミナト) by Keke Kitaya (April 2020–February 2022)
 * Meiji Koko no Ko (明治ココノコ) by Mutsumi Banno (June 2020–July 2023)
 * Bijutsushitsu no Monsters (美術室のモンスターず) by Tsuchitatsu Suzuki (September 2020–January 2022)
 * AK-69 no Naki Meshi (AK-69の泣きメシ) by Yusuke Matsumoto, AK-69 (November 2020–May 2022)
 * Life Maker by Kōsuke Utsue (April 2021–August 2023)
 * Yakyuu Miyō yo! (やきゅうみようよ!) by Moto Tsujishima (May 2021–July 2022)
 * Pinkaponka (ピンカポンカ) by Emu Eichi (June 2021–June 2023)
 * Kami-sama, Boku wa Kizuite Shimatta (神様、僕は気づいてしまった) by Nanashi Uematsu and Hiroaki Iwaki (original story) (July 2021–December 2021)
 * Kujima Utaeba Ie Hororo (クジマ歌えば家ほろろ) by Akira Konno (October 2021–May 2024)
 * Kaigai Master to Koko dake no Hanashi (海外マスターとここだけの話) by Gokayajin (December 2021–August 2022)
 * Share House Nile (シェアハウス・ナイル) by Hiroo Nakamichi (story) and Megumi Dorokawa (art) (July 2022–February 2024)
 * E o Kaku Futari (えをかくふたり) by Ippan Nakamura (August 2023–March 2024)
 * Bokutachi no Kimochi (ぼくたちのキモチ) by Minato Ayase (January–March 2024)

Light novels

 * Stitches (怪、刺す) written by Hirokatsu Sahara and illustrated by Junji Itō (June 2009–February 2010)
 * Time Mail (タイムメール) written by Tōichirō Kujira and illustrated by Hiroto Ōishi (June 2009–May 2010)