Hassō-an (八窓庵) is a historic chashitsu located today in Sapporo, Hokkaido, northern Japan.
It was originally located at Komuro Castle (小室城) in Ōmi Province, present Nagahama, Shiga.
It was designed by the tea master Kobori Enshū (1579-1647).
[1] It is on the list of Cultural Properties of Japan — structures (Hokkaidō).
[2] Media related to Hassō-an at Wikimedia Commons