MF Bunko J (MF文庫J) is a publishing label affiliated with the Japanese publishing company Media Factory. It was established in July 2002 and is a light novel label that is aimed at young adult males.
Label names "J" is for "Japan" and "Juvenile" have meaning.
| Contents: | Top · 0–9 · A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| 0416 & 0417 | Mariko Shimizu | toi8 | 2 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Aoba-kun to Uchū-jin | Shūmei Matsuno | Chōniku | 1 |
| Arase Haruka, Yōsha Nashi! | Masato Kumagai | Sakana | 1 |
| Astronaut! | Chūgaku Akamatsu | bomi | 1 |
| Asobi ni Ikuyo! | Okina Kamino | Hōden Eizō | 10 |
| Avalon | Mamoru Oshii | toi8 | 1 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Boku wa Tomodachi ga Sukunai | Buriki | Hirasaka Yomi | 6 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Chocotto Sister: Four seasons | Gō Zappa | Sakura Takeuchi | 1 |
| Chi wo kakeru Niji | Ren'ichi Nanai | Rui Hikarizaki | 1 |
| Culdcept Sōden: Storm Bring World | Tō Ubukata | Koban Sameda | 2 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Divergence Eve | Tōru Nozaki | Toshinari Yamashita et al. | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Final Seeker - Rescue Wings | Issui Ogawa | Nanashiki Yamamoto | 1 |
| Fushigi Tsukai | Shin'ya Kasai | URA | 2 |
| Fūsui Gakuen | Natsumidori | Nagira | 8 (Franchise) 2 (Extra) |
| Fūsui Shōjo | Natsumidori | Sunao Minakata | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Gad Guard | Kyōhei Umoto | Yoshitsune Izuna | 4 |
| Galgo!!!!! | Tomoyasu Higa | Kei Kawahara | 2 |
| Gankutsuou: The Count of Monte Cristo | Shūichi Kamiyama | Hidenori Matsubara et al. | 3 |
| Gravion Zwei | Fumihiko Shimo | Takehiro Miura et al. | 2 |
| Godannar | Kyōhei Umoto | Takahiro Kimura et al. | 4 |
| Golem Girls | Tomokazu Ōkubo | KEI | 2 |
| Green Green | Yoshikazu Kuwashima | Kurotama Shōkai | 3 |
| Gun Princess | Madoka Takatono | Katsumi Enami | 8 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Hybrid Gakuen | Oda Kyōdai | Renga (1 only), Atsushi Suzumi (2 and 3) |
3 |
| Hitokakera | Nako Hoshiie | Warawara Fujiwara | 1 |
| Himemiya-san no Naka no Hito | Sōhei Tsukimi | Ein | 3 |
| Hōkago Login | Sow Kamishiro | Mikako Mikaki | 3 |
| Holy Maiden | Jun Hashimoto | Chiyoko | 2 |
| Haunted! | Yomi Hirasaka | Yū Katase | 4 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Iconoclast! | Ichirō Sakaki | kyō | 10 |
| Iōjima Gakuen | Akira Suzuki | Jiji | 4 |
| Infinite Stratos | Izuru Yumizuru | Okiura | 6 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Jōtō series | Isao Miura | Runa | 8 |
| Junk Force | Hideki Kakinuma | Eiji Komatsu | 5 |
| Junk Force: from Mars | Hideki Kakinuma | Bijin Happō | 2 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Kage Kara Mamoru! （"Mamoru the Shadow"） |
Tarō Achi | Sai Madara | 10 |
| Kamisama Kazoku | Yoshikazu Kuwashima | Suzuhito Yasuda | 8 (Franchise) 1 (Z) |
| Kamisama no Okiniiri | Yasujirō Uchiyama | Taketo Sanada | 4 |
| Kämpfer | Toshihiko Tsukiji | Senmu | 15 |
| Kana | Tōru Tamegai | Sōshi Hirose | 1 |
| Kannōsha Saki: Net stalker no Wana | Oda Kyōdai | Hideyuki Takenami | 1 |
| Kanojo wa Missile | Kō Sudō | Ryūsuke Hamamoto | 1 |
| Kanokon | Katsumi Nishino | Koin | 14 |
| Kaze no Kishi Hime | Noboru Yamaguchi | Eiji Usatsuka | 2 |
| Kimi ga Nozomu Eien | Kenji Nojima | Yōko Kikuchi et al. | 3 |
| Kiraho Sakurano | Sōhei Tsukimi | Nagare Yūryū | 3 |
| Kudan no Hanashi wo Shimashōka | Yasujirō Uchiyama | Asami | 1 |
| Kujibiki Unbalance | Michiko Yokote & Friends (1st), Tatsuya Hamazaki (2nd) |
Keito Koume & Kengō Yakumo | 3 (1st) 2 (2nd) |
| Kurau Phantom Memory | Hiroshi Tominaga | Tomomi Ozaki & toi8 | 2 |
| Kurayami ni Yagi wo sagashite | Masaya Hoshika | Sikorsky | 3 |
| Kurukuru Real | Naoko Haneda | x6suke | 1 |
| Kyū-Kyū Cute! | Kenji Nojima | Kurihito Mutō | 6 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Limitress! | Kō Sudō | Yayoi Hizuki | 3 |
| Locksmith Karna no Bōken | Sōhei Tsukimi | Ginpachi | 4 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Majo no Seitokaichō | Akira | Atsushi Suzumi | 2 |
| Majo Rumika no Akai ito | Hajime Taguchi | Kazuoki | 2 |
| Minami-Aoyama Shōjo Book Center | Yoshikazu Kuwashima | Shichimi Koshō | 2 |
| MM! | Shūmei Matsuno | QP: flapper | 10 (and 2 side story novels) |
| Monocheros no Majō wa ugatsu | Kōhei Ito | Mishima | 3 |
| Mushi to Medama | Akira | Mausu Mitsuki | 6 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Nagisa Fortissimo | Kaya kizaki | Kasumi Kirino | 5 |
| Nanahon Ude no Jessica | Kō Kimura | Kazuyuki Yoshizumi | 1 |
| Nanaya Monogatari: DT ibun | Masaki Wachi | Jinroku | 1 |
| Nekura Shōjo wa Kuromahō de Koi wo suru | Masato Kumagai | Elet | 5 |
| Necroma. | Yomi Hirasaka | Jirō | 3 |
| Nepenthes | Mariko Shimizu | toi8 | 1 |
| Noein | Miya Asakawa | Fumio Matsumoto | 1 |
| Nurse Witch Komugi | Ichirō Sakaki & Shinobu Takeno | Akio Watanabe et al. | 2 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Ohkoku kara kita Shōnen | Okina Kamino | Mattaku Mōsuke | 1 |
| Origin: Spirits of the Past | Kyōhei Umoto | Kōji Ogata | 1 |
| Onii-chan dakedo Ai sae Areba Kankei Naiyone! | Suzuki Daisuke | Uruu Gekka | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Paracelsus no Musume | Yū Godai | Mel Kishida | 7 |
| Part Time Princess | Sō Kamishiro | Shūtarō Yamada | 3 |
| PiPit!! | Masaki Wachi | Yūsuke Shiba | 2 |
| Piyo Piyo Kingdom | Kō Kimura | Miho Takeoka | 3 |
| Princess Maker 4 | Akira Suzuki | Naoto Tenhiro et al. | 1 |
| Project Minerva | Hiroya Moriyasu | Itokatsu | 1 |
| Puipui! | Natsu Midori | Namori | 10 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| RahXephon | Hiroshi Ōnogi | Akihiro Yamada et al. | 6 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Saishū Agent Chikaru | Jun'ichi Ōsako | Rei | 1 |
| Seiken no Blacksmith | Isao Miura | Runa | 10 |
| Sekai ga owaru Basho e Kimi wo tsurete iku | Shin'ya Kasai | Osamu Oya | 1 |
| Sekai saidai no Kobito | Naoko Haneda | Sunaho Yobe | 2 |
| Sendō war: Sekai wo uchikudaku mono | Kenji Ōbayashi | Haru Wamusato | 1 |
| Sōkyū no Megami | Akira Suzuki | Ganpon | 2 |
| Sora ni Usagi ga noboru koro | yomi Hirasaka | Hiromu Minato | 4 |
| Sora to Tsuki no Oh | Kei Shimojima | Ginka | 2 |
| Spiritual: Hatarakazaru mono Kū bekarazu | Yoshiki Hiraya | Kashimami | 1 |
| Stratos 4 | Takeshi Mori | Noriyasu Yamauchi et al. | 4 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Tenbatsu! Angel Rabbie | Mitsuhiro Yamada | Chisato Naruse | 1 |
| The King of Braves GaoGaiGar Final | Yūichirō Takeda | Takahiro Kimura et al. | 2 |
| The SoulTaker | Masaki Wachi | Akio Watanabe et al. | 2 |
| Tori wa Tori de aru tameni | Kenji Nojima | Oxijiyen | 4 |
| Tsubasa | Shunpei Asō | Kaori Fujita | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| UFO Ultramaiden Valkyrie | Tasuku Saiga et al. Kaishaku (Original Creator) |
Maki Fujii et al. | 4 |
| "Uso" trilogy | Mariko Shimizu | toi8 | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Voices of a Distant Star | Waku Ōba Makoto Shinkai (Original Creator) |
Kō Yaginuma | 1 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Wandaba Style | Kōichi Taki | GotoP et al. | 1 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Yūkyū Tenbōdai no Kai | Katsuya Sayazuka | Yasu | 1 |
| Yōryoku Senkan Terrarium | Natsumidori | Okama | 3 |
| Title | Author | Illustrator | No. of volumes |
|---|---|---|---|
| Zero no Tsukaima ("Zero's Familiar" or "The Familiar of Zero") |
Noboru Yamaguchi | Eiji Usatsuka | 20 |
| Zero no Tsukaima Gaiden: Tabitha no Bōken | Noboru Yamaguchi | Eiji Usatsuka | 3 |