noun
social skills; art of socializing
Refers to the ability or techniques for building and maintaining social relationships; often used in self-help or business contexts.
交際術を身につければ、人脈が広がる。
If you acquire social skills, your network will expand.
Compound of 交際 (socializing, association) and 術 (technique, art). The exact historical derivation is uncertain, but the word follows a common pattern for naming skills or methods.