Even when a prince himself is decent and healthy, he could still be disinherited if he did not have a heir, especially a son, or due to the troubles arising from his marriage and their consequences.
本人の素行や健康に問題がなくとも、後継者たる子、特に男子がないこと、婚姻問題やそれに付随して発生する諸問題も廃太子の原因となりうる。