Ancient Japan - Social Structure (hierarchy) , weapons, and a map

Megan went to an HMNS class where she learned about the social structure of ancient Japan. I will upload a picture when I find it.  She did a map of Japan and labeled the countries. Then, she learned about the knives and later about a very expensive knife that needs to be flexible but hard at the tip. This is hard to make and so a sword like this is very expensive.  It was called "The Katana".