個こ人じん間かん

noun which may take the genitive case particle 'no'

interpersonal; between individuals

Used as a no-adjective to describe something happening or existing between private individuals, as opposed to between organizations or in public contexts.

• 個こ人じん間かんの貸かし借かりはトラブルになりやすい。

  Lending and borrowing between individuals can easily lead to trouble.

• 個こ人じん間かん売ばい買ばいのサイトを利り用ようする。

  I use a site for person-to-person buying and selling.