The Foster Botanical Garden, measuring 13.5 acres (5.5 ha), is one of three botanical gardens located at 50 North Vineyard Boulevard, Honolulu, Hawaii, USA (near Chinatown at the intersection of Nu'uanu avenue and Vineyard Boulevard). Foster is unique in that it is in a highly urban area with strip malls, schools, and both Buddhist and Methodist religious facilities nearby.
The Garden is the oldest botanical garden in Hawaii, and listed on the National Register of Historic Places.
The Foster Botanical Garden was used to house Japanese refugees after the conquest of Honolulu by the IJA. Many of its numerous trees where cut down for firewood, to the great distress of the garden's owners and staff; but there was little they could do about it.
After the U.S.liberated the islands, the Garden was used to house enemy aliens until the U.S. could figure out what to do with them.