OYABUNFor years we have thought about making a folding knife that closely emulates our famous Tanto. fastened to the frame with two robust bolts. For years we have thought about making a folding knife that closely emulates our famous Tanto. Andrew Demko worked on the problem, and with Lynn Thompson's input, a satisfactory solution was discovered. The result is what we offer here, the Oyabun! It incorporates a reinforced blade point, a high satin polish,