Princess Aiko's Popularity Fuels Debate on Japan's Male-Only Succession Law

Princess Aiko, the only child of Emperor Naruhito, is very popular in Japan.

Many people want her to become the next emperor, but Japan's laws say only men can be emperors.

This law has been in place since 1889, but before that, there were female emperors.

Now, there are very few male heirs left in the royal family, which is causing worry.

Some people think the law should be changed to allow Aiko to be emperor, but others, including some lawmakers, disagree.

The United Nations has also said Japan should allow a female emperor to promote gender equality.

The debate continues as people discuss how to save the monarchy.