Loz
Mongoose
There are some lengthy lists of feudal families and their alliances that struck me as "list overload" without enough associated data to help decided how best to use them, however.
One of the things I've always found lacking in Japanese games is some idea of the family/clan structure (and associated names). The clan/family names are there to act as a simple hook for characters and GMs to then develop, using the background that IS provided on the Taira/Minamoto and Fujiwara clans. But yes, there are some lengthy lists and not enough detail on how these could be developed for the context. I'll certainly accept that criticism.
I am glad that, otherwise, the book hits the right notes. Thank you for the feedback.