With the deterioration of the war, women were obliged and nearly forced to wear them to defend themselves from air raids (Men were already issued the designated "kokuminfuku" (national uniform) before that).
戦局悪化に伴い空襲時の防空用に女性の着用が義務付けられ、半ば強制された（その前の時期から男性には国民服が制定、配給されていた）。