Translation guide
A tributary is a river or stream that flows into a larger river or lake. In Japanese, the most common and neutral term is 支流 (shiryū). There are also more specific or formal terms depending on context.
The most common meaning: a smaller river that joins a larger one.
A state that pays tribute to a more powerful one. This is a distinct historical meaning.
A country that pays tribute to a suzerain, especially in East Asian history.
琉球王国は中国の朝貢国だった。
The Ryukyu Kingdom was a tributary state of China.
支流 (shiryū) is a tributary, while 本流 (honryū) is the main stream or main current. They are often used together to describe river systems.
The English word 'tributary' can mean a river or a state paying tribute. In Japanese, these are completely different words. Use 支流 for rivers and 朝貢国 for historical tributary states.
This river has many tributaries.
A more formal or technical term, literally 'inflowing river'. Often used in official documents or hydrology.
この湖には複数の流入河川がある。
This lake has several tributaries (inflowing rivers).
Refers specifically to a distributary or branch of a river, but sometimes used for tributaries in certain contexts. Less common.
この派川は本流に合流する。
This branch stream joins the main river.
A descriptive phrase meaning 'a country that offers tribute'. More explanatory than a fixed term.
周辺の小国は貢ぎ物を納める国として扱われた。
Surrounding small states were treated as tributary states.