English uses "in order to" for everything: I study in order to pass. I speak slowly in order to be understood. Japanese splits this into two patterns, ために and ように. They are tested together at N4 and N3, and the difference is easy once you know the test.
The core test
Ask whether the thing you want is something you can directly control by will.
- ために is used when the goal is an action someone does on purpose, and the subject of both parts is the same.
- ように is used when the goal is a state or outcome that is not directly controlled, often a potential form, a negative, or a change of state, and the subjects can differ.
ために: purposeful action, same subject
Form: dictionary form (or noun + の) + ために.
- 日本に行くために、お金を貯めています。— I'm saving money in order to go to Japan.
- 試験に合格するために、毎日勉強しています。— I study every day to pass the exam.
- 健康のために、毎朝走っています。— I run every morning for my health.
The same person does both actions: I save, and I go. The goal (行く, 合格する) is something the speaker is aiming to do or achieve.
ように: a state you hope will result
Form: dictionary form or ない form, or potential form + ように.
- 日本語が話せるように、毎日練習しています。— I practice every day so that I can speak Japanese.
- 忘れないように、メモしておきます。— I'll make a note so that I don't forget.
- みんなに聞こえるように、大きい声で話してください。— Please speak loudly so that everyone can hear.
Here the goal is a state: being able to speak, not forgetting, being audible. These are not actions you can simply choose to do in the moment.
Typical verbs for each
| Usually ために | Usually ように |
|---|---|
| 行く, 買う, 作る, 勉強する | 話せる, 見える, 聞こえる, 分かる |
| 合格する, 働く, 貯める | 忘れない, 遅れない, 風邪をひかない |
| volitional verbs | potential forms, negatives, verbs of state or perception |
If the verb before it is a potential form (できる, 話せる), a verb of perception (見える, 聞こえる), or a negative (～ない), ように is almost always right.
Different subjects
When the subject of the goal differs from the subject of the main clause, ように is the usual choice, because the goal is not under your control.
- 子供が風邪をひかないように、暖かい服を着せた。— I dressed the child warmly so the child wouldn't catch a cold.
- 学生が分かるように、先生はゆっくり話した。— The teacher spoke slowly so the students would understand.
Related look-alikes
These patterns are close cousins, so do not mix them up:
- ようにする: "make an effort to" or "make sure that." See ようにする vs ことにする.
- ようになる: "come to be able to." Same article.
- ために (cause): In a different use, ために can mean "because of," as in 雨のために、試合が中止になった (the game was canceled because of rain). This is more formal and appears at N3.
Common mistakes
- Using ために with a potential form: ✕ 日本語が話せるために. Use ように.
- Using ように with a clear volitional action: 日本に行くように貯金している sounds off; use ために.
- Forgetting the の with nouns: 健康のために, not 健康ために.
A quick decision flow
- Is the goal a deliberate action by the same person? → ために
- Is the goal a state, an ability, a perception, or a negative? → ように
- Are the subjects different? → ように
- Is the noun the goal? → noun + のために
How the JLPT tests it
Typical question: "日本語が（ ）、毎日練習しています。" with options like 話すために / 話せるように. You decide based on whether the goal is a deliberate action or a state. Practicing with explanations lets you see the reasoning behind each answer, and recording misses in a mistake log with the verb type builds the habit of checking it.
Where to go next
These patterns sit in the N4–N3 range described in the JLPT N4 study plan, and the JLPT preparation guide covers the full path. JLPT Ready's Learn section gives each grammar point a plain-language explanation and links it to practice questions that test it, and every question comes with an AI explanation. You can start free with N5, no card required.