In the latter Edo period, Emperor Kokaku tried to give a posthumous title to his father, Kaninnomiya Imperial Prince Sukehito, and this came into conflict with Sadanobu MATSUDAIRA of the bakufu, who opposed that there is no precedent of giving a title to one who was not enthroned as the Emperor, and this was called the Songo Ikken (honorific title incident),
江戸時代後期には光格天皇が父親の閑院宮典仁（すけひと）親王に太上天皇の追号を送ろうとしたが、天皇に即位しなかった者への贈位は前例がないとして反対した幕府の松平定信と衝突する尊号一件と呼ばれる事件が発生した。