Ryu vs. Ryuha?

Question

I know Ryu means school and Ha means group or school of thought, but what is the difference between the two?

Answer 1

In more technical aspect of the budo terms.   Commonly knowns as style or system of a particular style,  "Ryu" is translated correctly as "to flow".    

The "ha" addition can be translated as  selected group or perhaps a faction.  

A good example would be as follow:

Ryu =  Matsubayashi Ryu

Ha =   Matsubayashi Ushiro-Ha Ryu

Hoped this helps !