To specify a Ryu, usually the sorts of training employed are given to it (like it is done in Bugei Ryuha Daijiten). So one can go and state (for example):
Tawada Ryű (Saijutsu)
Yamane Ryű (Bôjutsu)
Matsumura-ha (Karate, Kobujutsu)
Ufuchiku-den (Kobudô)
Soeishi Ryű (Bôjutsu)
Shuri-te (Karate)
Naha-te (Karate)
and so on.
Maybe it would be correct to say:
Motobu Ryű Bujutsu (Kenjutsu, Naginatajutsu, ... Odori, ...)???