Katakura Masanori

Also Known as KATAKURA Ookamigumi Masanori [片倉・狼組・政憲] .
Also Known as KATAKURA M. Masanori [片倉・Ｍ・政憲]

Katakura Masanori-sensei is credited on the manga as Katakura . Ookamigumi . Masanori, and he uses a few other aliases too. Maybe Ookamigumi is the name of his studio. Fans may know of him from his series in Monthly Shounen JUMP: Kurohime is his most famous manga.
Kurohime was discontinued with the cancellation of the magazine, but revived with a web serialisation.