Yes, this is true. In brown vs board of education of Topeka, the case got a legal victory due to the fact that it wasn't separate but equal, as the girl had to walk 20 blocks - a few miles - to get to her school, as she attends a black school. white people were able to get to schools near them, which is totally unfair. so the supreme court said 'separate but equal' is unconstitutional.
Japan used to be an isolated country as it's borders were closed to everyone. After they opened the borders, they started developing the country by accepting new technologies and anything similar that was considered to be beneficial for the country's well being. They also started to perfect things that they adopted which led to new inventions and advancements.