A record of daily events or activities, often used in formal, business, or nautical contexts. More structured than a personal diary (日記).
I write a daily work log every day.
船長は航海日誌をつけている。
The captain keeps a ship's log.
I keep a log of the day's work every day.
He recorded the incident in the ship's log.
The nurse submits a duty log every night.
pilot logbook; aircraft technical logbook