Title: Nanboku kokkyō chiiki ni okeru minkan kōryū ni yoru arata na chiiki shinkō no arikata ni kansuru chōsa kenkyū
Subjects: Relations
Places: Hokkaido (Japan), East Asia, Sakhalin (Sakhalinskai︠a︡ oblastʹ, Russia), Okinawa-ken, Okinawa-ken (Japan), Sakhalin (Sakhalinskai︠a︡ oblastʹ), Southeast China, Japan, Taiwan, Hokkaido, Russia (Federation)