noun
amity treaty; friendship treaty
Historical term for a treaty establishing friendly relations between nations, often used in the context of 19th-century Japanese diplomacy.
両国は修好条約を結んだ。
The two countries concluded an amity treaty.
条約 is a general term for 'treaty', while 修好条約 specifically refers to a treaty of friendship or amity.
Compound of 修好 (shūkō, 'friendship, amity') and 条約 (jōyaku, 'treaty'). The exact historical derivation is uncertain; the term is conventionally associated with diplomatic agreements.