The imperial court in Kyoto was the nominal ruler of governments of Japan from 794AD until the Meiji period. But then after the court was moved from Kyoto
According to Albert Barnes, their mistake was that they didn't speak against slavery. Although many of them believed that slavery was against god and against the idea that god made everyone equal, they didn't do much against it out of many reasons, either they thought it was a necessary evil or they were afraid of the public reaction.
Because the printing press was not invented until later, so before that all books had to be copied by hand. It was very time-consuming and required a lot of skill.
Because he was highly praised as a person