I took yamashiro, and held it for a fair while and I took mikawa and totomi (I burned Totomi down because I wasn't sure if I could hold it).
I lost Hino and retook it and I also took Wakasa.
Now Shimazu just hit me with 5000 troops in wakasa! I retrested to save my army and hopefully he'll split his forces a bit. I threw a few units at border provinces to distract him as well. Hojo and Takeda are fighting over western japan (I forgot I took the province southeast of Musashi) Tokugawa is broken after I took his provinces from him, he's alive in hizen and might be hanging on to some other provinces. Shimazu has taken the western half of Japan and is powering towards me.
Also Iga (?) will only produce shinobi and cavalry even though I have all the buildings necessary to produce YS, naginata etc. They can be queued but they are never produced.

ReluctantSamurai - thanks for the advice, Tokugawa's BFN were difficult. They are invisible to my teppo until they are too close to be fired upon. I managed to destory most of them in one big battle, I lost a lot of men but when I remembered that he'd lost over 100 BFN I felt better :)