The five locations are called from the bottom, kozori (small curve), oogoshi (area around the belt), do (stomach), toriuchi (37-38 cm below the upper area of the bow), hime zori (princess sori) and harigao, and different harigao and strengths are formed from the reflection strength balance.
下から小反り、大腰、胴、鳥打ち、姫反りと呼ばれ、5カ所それぞれの反発力の強弱バランスによって張り顔は成り立ち、また弓の性能を引き出している。