交こう換かん日にっ記き

noun

exchange diary; shared diary between friends

A notebook passed back and forth between friends (often schoolgirls), where each person writes entries in turn. The term is culturally specific and widely understood in Japan.

• 中ちゅう学がく生せいのとき、友とも達だちと交こう換かん日にっ記きをしていた。

  When I was in junior high, I kept an exchange diary with a friend.

• 交こう換かん日にっ記きは、お互たがいの気き持もちを知しるいい方ほう法ほうだ。

  An exchange diary is a good way to understand each other's feelings.