Honzen-ji, Buddhist temple in Yoshino, Japan

Honzen-ji, also called Iigai Gobo, is a Jodo Shinshu temple at the foot of Mount Mutsuo in Yoshino. Its grounds hold a main hall, a keyaki-wood mountain gate, a drum tower, a scripture store, a tea room, and a columbarium for the ashes of successive head priests. Behind the main hall is Rennyo's grave.

Buddhist monk Rennyo founded the temple in 1476 during an era of expanding religious influence in the Nara region. This period saw the growth of Buddhist institutions throughout the area.

Honzen-ji is also called Iigai Gobo, and its mountain name is Mutsuo-zan. It served as the head of 86 Hongan-ji branch temples in the Yoshino region. The temple keeps the "Hiunkaku Old Drawing", which records the decorations for the 25th memorial service of Yotoku-in, mother of the head priest Jakunyo, held in 1699 at Hongan-ji's Hiunkaku.

Honzen-ji stands in the Iigai district of Yoshino, with the buildings grouped around the main hall and the Rennyo burial site behind it. The eleven structures registered in 2010 — main hall, Rennyo hall and its worship hall, sutra repository, bell tower, tea room, entrance, guest hall, Onari hall, kitchen and mountain gate — are best seen on foot in that order.

Behind the main hall stands Rennyo's grave, and a charnel hall holds the ashes of the chief priests who followed him. The temple also keeps a copy of the "Hiunkaku Old Drawing", recording the decorations for the 25th memorial of Yotoku-in, held in 1699 at the Hiunkaku of Hongan-ji in Kyoto.