I have recently moved to Seattle and the koryu I practice is Kashima-shinden Jikishinkage-ryu kenjutsu. I am very impressed by the amount of koryu in the PNW: Takamura-ha Shindo Yoshin-ryu, Sosuishi-ryu, Shinto Muso-ryu, Daito-ryu, Takenouchi-ryu, Toda-ha Buko-ryu, Araki-ryu, Tenshinsho-den Katori Shinto-ryu, Owari Shinkage-ryu, Owari Kan-ryu, the list goes on (is that even exhaustive -- there probably is more).
Mark Raugas
www.innerdharma.org