This armor is attributed to Ohori Tsuruhime (1526 (?)-1543 (?)) a miko (priestess) of the Oyamazumi shrine on Omishima island. As the daughter of the head-priest, she took command when he died of illness. In 1541 she led troops during two naval battles in order to repel invaders.
And it is nice to see some realistic female-armor. Of course, no boob-plate.