Emperor Daijo was a very important man in ancient Japan. He lived a long time ago, around the year 900 AD. He was the Emperor of Japan, which meant he was like the king of the entire country.
One of the biggest things that Emperor Daijo did was to change the way people practiced religion in Japan. Before he became emperor, people used to follow many different gods and goddesses. But Emperor Daijo said that everyone in Japan should follow one main religion called Buddhism.
Emperor Daijo also wanted to make sure that the government was more powerful than it used to be. He created a lot of new laws and made sure that the emperor was in charge of everything in the country.
Another important thing that Emperor Daijo did was to make sure that people were treated fairly. He made sure that everyone had the right to a fair trial if they were accused of doing something wrong. He also made sure that people were treated kindly if they were sick or hurt.
Overall, Emperor Daijo was a very important person in Japanese history. He helped make the country more unified and stronger. He also made sure that people in Japan were treated fairly and had the same opportunities as everyone else.