Normally, when the next heir to the Imperial Throne is determined, the ceremonial investiture of the Crown Prince is carried out at the same time or immediately after a few days and the heir becomes Crown Prince.
通例であれば、次期皇位承継者が決定されると同時に、もしくは日を改めて速やかに立太子礼が開かれ、次期皇位継承者は皇太子になる。