Yes they are rivals. back and forth
Well the first one, and the fourth one.
I think it would be ( They mainly stayed out of sight, but were in complete control of all matters big and small.) hope this helps.
Answer:
Different regions developed different traditions and cultures.
Explanation:
This is because some parts of Japan were on Islands or perhaps even hindered by mountains. With no other influence, they often developed their own traditions. ofc now and later they could travel and the like, but I assume this is in regard to older Japan. I can't really explain that well but if my answer is wrong I am so so sorry!! :(