Title: Shindai Chūgoku Ryūkyū kōshōshi no kenkyū
Subjects: Foreign relations, Relations, History, Chūgoku-Rekishi-Shin jidai, Chūgoku-Taigai kankei-Nihon-Rekishi, Okinawaken-Rekishi
Places: China, Japan, Ryukyu Islands, Okinawa-ken (Japan)
Time periods: 1644-1912