This is a posable action figure from the Nendoroid series.
From the Good Smile Company website:
From the popular manga and anime series, "Hozuki no Reitetsu" comes a Nendoroid of the sadistic oni that serves as first aide to the King of Hell, Hozuki! He comes with both a standard calm expression, as well a contrasting aggressive expression filled with rage. His beloved metal club is included for him to wield.
Other optional parts include the goldfish plant he keeps as a pet, as well as Shiro - the dog that serves as a kind of mascot for hell's guards! Shiro's front legs are articulated allowing for some alternating poses for him as well! While the composed and serious look has been kept faithfully, the cute Nendoroid charm has also been added for a Hozuki-sama that fans will be happy to add to their collection!