jigoku sensei nube
A supernatural comedy series that was serialized in Shounen Jump from 1993 until 1999. A 48-episode anime was also produced in 1996.
Nueno Meisuke, aka Nube, is the homeroom teacher for Class 5-3 at Doumori Elementary. He is also a skilled exorcist, protecting his students and Doumori's townsfolk from supernatural threats with strength borrowed from a powerful demon sealed in his left hand - a technique he calls the Demon's Hand.