She was born in 1744 in Kurayoshi, Hōki Province (now Minatomachi, Kurayoshi City, Tottori Prefecture) to father Iwamuro Muneken, a vassal of the Arao clan [ja], a retainer of the Tottori domain, and a mother who was a daughter of an iron wholesaler.[1][2]
At the age of 9, she moved to Kyoto with her father, who had become a Rōnin and a town doctor.[3] She was adopted and served in the Kushige clan [ja], and by the time she was in her teens, she took the surname Tachibana.[1][2]
Later, when she married Sukehito, Prince Kan'in, she changed her name to Iwashiro and became the prince's wife. She gave birth to three sons. Her eldest son, Prince Morohito,[4] took Princess Yoshiko, the only child of Emperor Go-Momozono, who had no sons, as his empress, by recommendation of his adopted mother, Empress Go-Sakuramachi.[5]
After the death of her husband, she became a monk, took the name Renjoin.[1][2]
She died in 1813 and was buried at Rozan-ji.[6] In 1878, she was posthumously awarded the rank of Shoshii [ja][7] one of the highest ranks of Shinkao, and in 1902, the rank of Juichii [ja].[1][2]