A personal daily record of events, thoughts, or experiences. Can refer to a physical notebook or a digital log.
I write in my diary every night before bed.
旅行の日記を読み返すと、その時の気持ちがよみがえる。
When I reread my travel journal, the feelings from that time come back to me.
I wrote down what happened today in my diary.
It's my habit to write in my diary before going to bed.
He doesn't show his diary to anyone.
diary; journal
exchange diary; shared diary between friends