At one point, "Kameno-o" (literally, King of tortoise) was proposed, but Kameji ABE who felt timid with such grandiose name did not accept it but changed the name to "Kameno-o" (literally, a tail of tortoise.)
一時期「亀ノ王」との命名案があったが、それではあまりに畏れ多いと阿部亀治自身が恐縮して「亀ノ尾」に落ち着いたとされる。