開始
プロジェクトを開始する。
To start the project.
The act of beginning something; the point at which something begins.
会議の開始が遅れた。
The meeting's start was delayed.
新しい学期が開始した。
The new semester has begun.
Often used in formal contexts like business, education, or official announcements. Can be used as a noun (e.g., 開始時間 'start time') or as a verb with する (e.g., 開始する 'to start').
In computing or technology, the initiation of a process or program.
システムの開始手順を確認する。
Confirm the system's start-up procedure.
Common in software documentation or technical manuals.
Related Phrases
Pro Tip
Formal vs. Informal Alternatives
For casual conversation, スタート or 始める are more common. Use 開始 when writing emails, reports, or formal announcements to sound more professional.
Gold Rule
Using 開始 as a Verb
When using 開始 as a verb, it must be paired with する to form 開始する. For example, '会議を開始する' means 'to start the meeting.' Do not use it as a standalone verb.
Word Origin
Composed of the kanji 開 (open, begin) and 始 (begin, start). The compound word emerged in classical Japanese, combining the meanings of both characters to emphasize the act of initiating something.
Usage Notes
開始 is more formal than スタート or 始まり and is preferred in written or official contexts. It is often used in news reports, academic papers, or business documents. As a verb, it is typically used with する (e.g., 開始する 'to start').