The Sankaku Bashi (三角橋) was the second obstacle of the First Stage in KUNOICHI 6. The obstacle was almost identical to the Prism See-Saw from SASUKE 13, where it consisted of a triangular prism that tilted on an axis in the center as competitors jump onto it. It took out at least four competitors, and was replaced by the deadly Danchigaibou in the next tournament.