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Songs about Ninshi:
Nomba Ninshi by Slap Dee from the Album TrueStory
Wiki information Ninshi:
Kujō Ninshi, also known as Fujiwara no Ninshi was Empress consort of Japan. She was the consort of Emperor Go-Toba. She was the daughter of regent Kujō Kanezane. Issue: Imperial Princess Shōshi - unmarried Empress as adopted mother of Emperor Juntoku