As there had existed no precedent for someone who had been given a family name (a practice which had the effect of stripping a son of an emperor of his title as Prince, and removing him from the line of candidates eligible to inherit the throne) to become Emperor, Emperor Koko reinstated Sadami as Prince from his deathbed, and passed away on that same day.
臣籍降下した者が即位した先例がないため、臨終の天皇は定省を親王に復し、東宮となした日に崩じた。