Hope you don't mind the familiarity....can't tell if that's an "0" or an "o". Indeed I remember the movie (with James Caan, Robert Duval and Mako). My recollection was that the style was Korean Hwa Rang Do, though I won't swear to this. The Japanese and Chinese also have cane styles. (CaneMasters offers a fairly good video training set...to the extent that video training can be termed "good". The style is Japanese)
I seem to recall that one of the Billy Jack movies also featured a Korean practitioner (Joo Bang Lee? He Il Cho?), with some great cane fighting sequences.