Hoshun-in Temple was founded in 1608 by Matsuko (Matsu, Hoshunin), the wife of Toshiie MAEDA who was founder of the Kaga Domain with a value of one million koku, who named Gyokushitsu Sohaku as first chief priest.
慶長13年（1608年）に玉室宗珀（ぎょくしつそうはく）を開祖として加賀藩百万石の祖・前田利家の夫人・松子(まつ，芳春院)が建立。