It was also called Baka (fool) Nishu, because in spite of its large size it had only half the face value of ichibu-gin silver, which were smaller in size.
また大きいばかりで、より小型の一分銀の半分の額面価値でしか通用しなかったことからバカ二朱（ばかにしゅ）とも呼ばれる。