Rohai means "Vision of a Crane" or "Birdlike." Many people claim that the original version of the kata was from Tomari-te. Some believe that Tomari-te got it from Matsumura, because, they say, Matsumura created the original version. However, this is unlikely since the kata was probably from a much earlier time period. Some claim that Matsumura learned it in Tomari, and then created his own personal version. This theory, I believe is the most logical and likely one, considering what he did with the Ku Sanku and Pasai katas. The Matsumura system seems to be a blend of kata from many different places and masters. It doesn't really matter. Hohan Soken taught three Rohai kata. Some claim that two of Soken's versions were created by Itosu.