A New Take on Japan’s Warring States History

How to put it, maybe I don't know much about Japanese history, maybe the name is too hard to pronounce, and it's a bit difficult to read, but I probably understand it a little bit, but there is no clear explanation of when the Warring States Period started and when it ended. I have to find other books to prove it, and then compare it. His first chapter, which was written before the Warring States Period, also confused me. 🤔 Just treat it as a knowledge supplement, it's okay.