日誌

1. Origins, structure, and basic meaning

• Structure: 日誌 (にっし) is a noun for a journal or log that records daily activities, conditions, or observations.
• Basic usage: It names a continuing factual record such as a work log or ship's log.
  • 一日の作業内容を日誌に書いた。 — I wrote the day's work in the journal.
  • 古い航海日誌には天候が細かく記されている。 — The old ship's log describes the weather in detail.

2. Common pitfalls and similar expressions

• Operational log and personal diary
  • 日記 often records personal experiences or reflections, whereas 日誌 more strongly suggests a regular factual record of work, travel, or observation.