When the Japanese-Americans are sent to internment camps, many of the extras were Japanese-Americans who had actually been sent to the camps in the 1940s.
Several scenes were shot in Greenwood, BC, 275 miles from the coast. Several "Harbor" and "Ocean" signs remain there, confusing tourists.
Several scenes were filmed Greenwood, British Columbia, Canada. A lot of the Japanese extras were Japanese-Canadians who were interned during there war.
Boats used in the production were provided by the Columbia River Maritime Museum in Astoria, Oregon. They're part of its permanent collection.