Whether you have a palace number has nothing to do with whether you are married or not, mainly because the son or daughter of the crown prince and the emperor can have it. Prince Naruhito was called Hao Palace when he was a child, Wen Ren was called Li Palace when he was a child, and Princess Kiko was married when she was a child. Most of these palace numbers come from ancient books formed during the contention of a hundred schools of thought in ancient China. Wen Ren can't be a prince when he comes of age, so he has to set up another palace number. If Naruhito is the heir to the throne, the Japanese Palace Hall is so conservative and laid-back.
Japan's succession to the throne is wrong. If Youren doesn't have a son in the future, who will they find to inherit it? Isn't Aiko very wronged? As far as the present situation is concerned, Aiko is unlikely to succeed.