noun
good neighbor; friendly neighbor
Often used in formal, diplomatic, or literary contexts to describe amicable relations between neighboring countries or communities. The term carries a slightly elevated tone.
両国は善隣友好関係を築いてきた。
The two countries have built a good-neighborly and friendly relationship.
善隣外交を推進する。
Promote good-neighbor diplomacy.
友好 means 'friendship' in a general sense, while 善隣 specifically emphasizes being a good neighbor, often in a diplomatic or community context.
Compound of 善 (good) and 隣 (neighbor). The term is of Chinese origin and has been used in Japanese diplomatic and literary language.