noun
tributary system (of Imperial China)
Historical term referring to the diplomatic and trade framework in which surrounding states acknowledged Chinese suzerainty and sent tribute in exchange for recognition and trade privileges.
冊封体制は、中国王朝と周辺諸国との関係を規定した。
The tributary system defined the relations between Chinese dynasties and neighboring countries.
琉球王国も冊封体制に組み込まれていた。
The Ryukyu Kingdom was also incorporated into the tributary system.
From 冊封 (sakuhō, 'investiture') + 体制 (taisei, 'system'). The term describes the historical East Asian diplomatic framework centered on China.