Briefly describe similarities and differences between the feudal economic structures of medieval europe and medieval japan

How Japanese Castles are similar to European Castle
They had large and tall walls for protection
They often had moats around them to discourage the digging of tunnels
They had narrow and steep stairways to make assault difficult


Unlike European feudalism Japan’s feudalism system did not have a true pyramid form with the monarch presiding over the less important nobles. 

the authority in Japan was much less centralized than it was in the nation-states of Europe
Secondly, even though the lower nobility in Japan (the samurai) swore fealty to their local lords, the local lords didn’t give the samurai any land of their own.
hope this helps

Apocrypha is the answer your looking for