The development that probably hurt it is the reduction of open range herding. In history, people could just let their cattle roam freely and find food since the plains were huge and nobody lived in them. Nowadays, this can be problematic because there are more and more people and settlements and roads with cars so free range herding has been drastically reduced which cost the herders a lot.
Slavery meant that only whites were popular
The limitations would be how much evidence was available and the truthfulness of the witnesses. The Code dealt with violations of the law. The law specified punishments based on who you were...slave or master, etc..
The fact that Japan is a very small island nation has always made it hard for them to have enough domestic natural resources, which has historically meant that they have elected powerful leaders who have supported going to war with larger countries, such as China and Russia, in order to gain more territory.
