Illustrator, character designer, and manga creator Atsushi Ohkubo made his manga debut in 2001 in Square Enix's Monthly Shonen GanGan magazine with the series B.ICHI . Soul Eater , his longest-running work to date, ran in the same magazine from 2004-2013 and went on to become an international bestseller with nearly 20 million copies sold worldwide. It received an anime adaptation in 2008 that was later broadcast on Cartoon Network. Fire Force , his latest work, ran from 2015-2022 and has sold over 20 million copies worldwide. The first two seasons of its anime adaptation are currently streaming on Crunchyroll, with a third season in development.