Hatashiai! is the latest "we can make a realistic sword-fighting game" to seek crowd funding. I notice that in addition to six Japanese schools, they include "Chinese Sword" and "[Western] Long Sword" as options for players.
By the way, Kingdom Come: Deliverance is now in beta testing. It aims at a much wider kind of realism than just the sword-fighting, attempting to accurately recreate a moment in the Middle Ages as thoroughly as possible.