Choju-in Ihaibyo mausoleum lies just east of Shunrin Ihaibyo at the top of a hill. Choju-in was Tokugawa Ieyasu’s adopted daughter Renhime, and the seishitsu (official wife) of the first feudal lord, Toyo-uji. It is believed that the mausoleum was constructed when Renhime died in 1652.

Although the structure includes an irimoya-style gabled roof over a granite flagstone foundation, just like Shurin-in Ihaibyo, it is thought that the style was changed during repairs．The original roof would have been a pyramidal hogyo-zukuri roof.

Inside the mausoleum, you will see a kuden shrine dedicated to Renhime (posthumously called Choju-in). There is also a stone monument dedicated to Chiko-in, the Buddhist name of the wife of the ninth feudal lord, Yorinori. She was the daughter of Nariatsu, the third feudal lord of the Hitotsubashi-Tokugawa family. The Mitsuba-aoi (three leaf) crest of the Tokugawa family found on the roof and roof ornaments of the ihaibyo tell us that these plaque owners were Tokugawa family officials.