Title: Henkan kōshō
Subjects: Boundaries, History, International status, Foreign relations, Nihon-Taigai kankei-Amerika gasshūkoku-Rekishi, Okinawa mondai, Nihon-Taigai kankei-Roshia-Rekishi, Hoppō ryōdo mondai, Diplomatic relations, International law
Places: Japan, Ryukyu Islands, Kuril Islands (Russia), United States, Russia (Federation)
Time periods: 20th century, 21st century, 1945-1972