Translation guide
The English word 'bilateral' is used in several distinct contexts. This guide helps you choose the right Japanese expression depending on whether you mean 'involving two sides,' 'affecting both sides of the body,' or 'between two countries.'
They reached a bilateral agreement.
Means 'two-way' or 'bidirectional.' Often used for communication, trade, or exchanges that go both ways.
Bilateral communication is important.
Means 'mutual' or 'reciprocal.' Emphasizes that both sides are doing something for each other.
They cooperate for bilateral benefit.
Referring to relations, treaties, trade, or talks between two nations.
Describing a condition, symptom, or procedure that occurs on both the left and right sides of the body.
Describing an object or organism that has two symmetrical sides.
Means 'bilaterally symmetrical.' Used in biology, design, or everyday descriptions.
The human body is bilateral.
Both mean 'between two countries.' 二国間 is more formal and common in official documents, while 両国間 is slightly more conversational and often used in news reports.
Bilateral talks were held.
Bilateral tensions are rising.
The katakana word バイラテラル exists but is rarely used outside very specialized technical contexts. Stick to the Japanese terms above.
Bilateral relations are improving.