I do 2 Koryu, Muso Jikiden Eishin Ryu (long sword) and Shinto Muso Ryu (long sword, short sword, 4" staff, 3" staff, jutte and war fan). There are other weapons in SMR but I haven't studied them yet. I also do Okinawan Goju Ryu (arguably a koryu). I have also trained in Koryu Uchnadi, which has koryu in it's name but is not recognised as such AFAIK.