Japanese sumo wrestler Hibikiryu died at a Tokyo hospital Wednesday, a month after being injured and left unaided for a time following a match. Hibikiryu, whose real name is Mitsuki Amano, was a low-ranked wrestler competing at the March Grand Sumo Tournament when he was thrown and landed head first on the ground. He lay motionless, face down, as officials seemingly milled around and then had to wait several minutes before a stretcher arrived to take him from the arena.

The official cause of death was given as acute respiratory failure and it's so far unclear if it was directly related to Hibikiryu's injury. But the sport's governing body, the Japan Sumo Association, has faced several scandals in recent years and is now receiving severe criticism over a perceived failure to protect wrestlers.