In 1998, Mashima created the
one-shot manga
Magician while working part-time at an
arcade, and entered it into a competition held by
Kodansha's
Weekly Shōnen Magazine. After completing
Rave Master, Mashima serialized
Monster Soul in the monthly magazine
Comic BomBom from 2005 to 2007. Mashima began
Fairy Tail in
Weekly Shōnen Magazine in 2006 and it went on to become one of the
best-selling manga series in history with over 72 million copies in print. It spawned a large franchise, including numerous spin-offs and adaptations, before ending in 2017. In 2011, Mashima created a
crossover manga between
Rave Master and
Fairy Tail published in the May issue of
Weekly Shōnen Magazine. It was adapted into an
original video animation released in August 2013. A special 2013 issue of
Weekly Shōnen Magazine featured a small crossover between
Fairy Tail and
Nakaba Suzuki's
The Seven Deadly Sins, where each artist drew a
yonkoma (four-panel comic) of the other's series. An actual crossover chapter between these two ran in December 2013. From July 17, 2014, to July 17, 2015,
Fairy Tail had its own monthly magazine titled
Monthly Fairy Tail Magazine, which included a prequel manga by Mashima himself titled
Fairy Tail Zero. In 2014, three spin-offs were started:
Fairy Tail: Ice Trail by Yūsuke Shirato;
Fairy Tail Blue Mistral by Rui Watanabe; and
Fairy Girls by Boku. Another spin-off manga titled
Fairy Tail Side Stories and created by Kyōta Shibano launched on July 30, 2015, in Kodansha's free
Magazine Pocket mobile app. On July 25, 2018,
Fairy Tail: 100 Years Quest began on
Magazine Pocket as the official sequel to
Fairy Tail. Mashima provides the original storyboards for the manga that is illustrated by Atsuo Ueda. At the end of 2021, Mashima approached Kodansha Game Creators Lab to hold a contest looking for video game proposals based on
Fairy Tail with the winning work receiving $132,300, $88,200 of which came from Mashima himself. The games should be created for platforms such as
Steam,
iOS and
Android, and Kodansha will distribute the winner to be decided in April 2022, with the profits shared between Kodansha and the developers. While creating
Fairy Tail, Mashima serialized
Monster Hunter Orage, an adaptation of the
Monster Hunter video games, in
Monthly Shōnen Rival from 2008 to 2009. Also in 2008, he drew a remake of Atsushi Kase's gag manga
Chameleon for the 50th anniversary of
Weekly Shōnen Magazine. Mashima's Japanese-style
epic fantasy one-shot
Hoshigami no Satsuki was published in the September 17, 2014 issue of
Weekly Shōnen Magazine. Mashima began the series
Edens Zero in
Weekly Shōnen Magazine on June 27, 2018, which ended on June 26, 2024. From October to December 2019, he created the mini-series ''
Mashima Hero's in Weekly Shōnen Magazine
for its 60th anniversary. It is a crossover between his three series Rave Master
, Fairy Tail
and Edens Zero
. Mashima drew a one-shot manga adaptation of the video game Dragon Quest XI S: Echoes of an Elusive Age'' for the October issue of
Shueisha's
V Jump magazine, which was released on August 21, 2019. On December 17, 2021, Mashima announced that he was developing an
Edens Zero video game by himself using
RPG Maker. Describing it as a "hobby project" that he worked on in his free time, he released
Rebecca to Kikai no Yōkan for free on
PC on March 16, 2022. ==Style and influences==