Some link or outside reference would really help, but it's not looking good. Firstly, Koryu refers to Japanese arts, not Okinawan, so we can rule it out immediately. But, depending on the kanji used, the name is rather odd, the term for "hidden warrior" is more commonly kagemusha ("shadow warrior"), if they're using the term "kakure", there's no "i" at the end, as that would be a completely different word (note: the term for "hidden" is more correctly "kakushi", and changes depending on the hiragana placed after the kanji itself). That and the names you've given, most particularly "Uhugushiku" just sound odd (it's the "Uhu" bit at the beginning, really).
Not looking good. Where did you come across them?