Practice JLPTHow to tell them apart
べく is a formal, written-style expression for purpose that attaches to verb dictionary forms and sounds stiff or official, while ために is the everyday, neutral way to express purpose across speech and writing. The key deciding factor is register: 削減すべくリストラを行う carries an organizational or bureaucratic tone, whereas 削減するためにリストラを行う sounds more ordinary. Swapping べく into casual conversation feels unnatural, and using ために in a formal corporate announcement can read too plain.
- べく Use べく for purpose in formal, written contexts like news, announcements, or business documents.
- 為（に）・ため（に） Use ために for purpose in neutral everyday speech and writing across most situations.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| べく beku | In order to/So as to | N2 |
| 為（に）・ため（に） ni tame ni | In order to/For | N4 |
べく beku
In order to/So as to
In order to; to; for the purpose of; for; so that ~ (can) | The verb modification form of the auxiliary bekida, which is used to indicate a purpose or aim.
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K社は人件費を削減すべく大規模なリストラを行う予定だ。
K Company plans to execute large-scale restructuring in order to reduce personnel expenses.
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この大学では、二学期制せいに変えるべく今準備が進められている。
At this university, preparation is under way for changing (the current system) to a semester system.
為（に）・ため（に） ni tame ni
In order to/For
On account of ~; for the benefit of ~; for the good of ~; for the sake of ~; on behalf of ~; for the purpose of ~; in order to ~; because of ~; owing to ~ | A noun that indicates a benefit, a purpose, a reason or a cause.
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ジャクソンさんは研究のため（に）ドイツに行った。
Mr. Jackson went to Germany for the purpose of research.
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フランスに行ったのは香水を買うためだ。
It was for the purpose of buying perfume that I went to France.
べく and 為（に）・ため（に） are JLPT N4–N2 grammar points that Japanese learners often mix up. This page compares them side by side — meanings, usage and example sentences — so you can tell them apart.