Two Meanings, Decided by Control
ために means "in order to" when you control the outcome, and "because of" when you do not.
- 日本へ行くためにお金を貯めています。(I'm saving money in order to go to Japan.) — purpose
- 雨のために試合が中止になった。(The match was cancelled because of rain.) — cause
A volitional verb gives purpose. A non-volitional verb or an event gives cause.
Attaching It
| Type | Form |
|---|---|
| Verb | 行くために |
| Noun | 健康のために |
Always the dictionary form for purpose — never the past.
For Someone's Benefit
With a person, ために means "for the sake of":
- 家族のために働いています。(I work for my family.)
ために vs ように — The Real Distinction
Both translate as "so that," and choosing between them trips up nearly everyone:
| Pattern | Verb before it | Example |
|---|---|---|
| ために | you control it (volitional) | 合格するために勉強する |
| ように | you don't (potential, negative, spontaneous) | 合格できるように勉強する |
The test: can you decide to do it? 覚える (memorise) is a choice → ために. 忘れない (not forget) is not → ように.
Also, ために needs the same subject in both clauses; ように does not.
Formal Alternative: ため
Dropping に makes it more formal and more often causal — common in announcements:
- 事故のため、電車が遅れています。(Trains are delayed due to an accident.)