Reverse Tiger's Mouth - Gyaku no Koguchi

…Because the bow is drawn forward to the left, turning left is more advantageous than turning right, so the tiger's mouth is designed so that the approaching player turns right. From the perspective of the castle soldiers, this is called a "jun no koguchi" (forward tiger's mouth), and the opposite is called a "gyaku no koguchi" (reverse tiger's mouth). Most square tiger's mouths in the early modern period were forward tiger's mouths. …

*Some of the terminology explanations that refer to "reverse tiger's mouth" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…弓を左手前に引くことから右折より左折の方が有利になるので，虎口は寄せ手が右折するようにくふうする。これを城兵の立場から順の虎口と呼び，反対を逆の虎口と呼ぶ。近世の枡形虎口はほとんど順の虎口になっている。…

※「逆の虎口」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報