The allegations include beating Wakanosato with a shovel (causing a wound that required 5 stitches), whacking Terunosato (Jonidan) with a wooden plank, and injecting Takanoyama with insulin. (Naruto himself is diabetic and the insulin was presumably his.)
Naruto is known for being super strict (making his rikishi do keiko in the dark following the earthquake and tsunami last march), strictly monitoring the quality of chanko, and for the Spartan (there’s the reference you were looking for) conditions in the heya.
In the wake of Kasugano-oyakata beating rikishi with the handle of a golf club we must ask ourselves…Is this madness? Or is this just one of the things that we need to accept from the sumo world? We’d love to hear your thoughts.