[@RyoRyoRyoken] I guess they became really out-of-touch with the shinobi world. Mostly because a) they ain't shinobi's and b) threat of war, I guess.

It's 'possible' but like Hillan said he would need to be shinobi, not samurai, because otherwise why is he in Kumogakure? Unless you can come up with a good enough reason for him to remain samurai yet be in Kumogakure and working for them.