The YuJing sourcebook was written prior to Uprising and as such has some Japanese content. However the YuJing sourcebook deals predominantly with the fallout of Uprising. And for the Japanese in Yujing space thats not good. Once we have presented all 20 books in the KS we'll be looking to see if there's interest in additional sourcebooks such as a SOL book (which would cover Japan more extensively)
To his friend a man
a friend shall prove,
To him and the friend of his friend;
But never a man
shall friendship make
With one of his foeman's friends.
The underlying tension of the lead up to the Uprising is a pretty cool era to play in. My players are on Shentang at the moment tracking down a Koguryo terrorist organization emboldened by the JSA successes. Unsure where it will lead but it's been fascinating thus far!