It is called harigao (stetched face) or nari when the tsuru of the bow is taunt, hikinari (shape of the bow when pulled) when the bow is pulled, and urazori (bow bending in an opposite direction, when the tsuru taking off from the bow) when tsuru is released, and these are important elements need to be observed when handling each bow characteristic and management.
弓に弦を張った状態での姿を張り顔・成り、充分に引いた時の弓の姿を引き成り、弦を外した状態では裏反りと呼び、それぞれ弓の性格や手入れする際に見る重要な要素である。