Keigin-ni (慶ぎん尼) was a Japanese noble woman member of Ryūzōji Clan during the Sengoku period. Often referred to as the "Widow of the Ryūzōji," her life was intertwined with the fortunes of the Ryūzōji clan. She was described as a courageous woman and always carried a short sword named ''Fumonshu''.[1]