Everyone's going " What'll happen to the Ultimate Menu " and nobody's going " ...We should get him to a doctor, hes VERY concussed for this to be happening ". Lol, poor Yamaoka.
Post-traumatic anosmia (complete) or Hyposmia (partial loss). Real thing, you CAN lose your sense of smell from a headinjury, but its more because the fibers in the nose tear on impact with the brain rattling in the head than it being " well he hit THIS spot of the brain so its gone now ". Thatd be more pseudoscience type stuff.
They better not do a " he hit the exact same spot and its back now " thing. Thatd be such nonsense.