Introduction
Have you ever wanted to explain the reason behind your actions in Japanese? For example:
- “I came to Japan in order to study the language.”
- “I am working part-time to go on a trip.”
- “This is an app for listening to music.”
In Japanese, you can clearly express your goals and purposes using ～ために and ～ための. While they look similar, they are used slightly differently depending on whether you are describing an action or a noun.
Let’s dive into how to use these grammar points correctly so you can start talking about your goals like a native speaker!
1. ～ために (in order to do)
～ために (tameni) is used to state the purpose or goal of an action. The structure is:
[Action 1 (Goal)] ために [Action 2 (What you do to achieve it)]
Meaning: I do Action 2 in order to Action 1.
Formation
Attach ために to the Dictionary Form of a verb.
| Type | Example | ～ために |
|---|---|---|
| U-verb | 行く (to go) | 行くために |
| Ru-verb | 食べる (to eat) | 食べるために |
| Irregular verb | する (to do) | するために |
| Irregular verb | 来る (to come) | 来るために |
E.g., 私は日本語を勉強するために日本に来ました。= I came to Japan to study Japanese.
What about Nouns? (Noun + の + ために)
You can also use nouns with ために to express doing something “for the sake of” someone or something. When attaching a noun, you must use the connecting particle の.
- 家族のために働きます。
I work for the sake of my family. - 健康のためにスポーツをしています。
I play sports for my health.
2. Essential Rules for ～ために (Don’t make this mistake!)
There are two very strict rules you must follow when using V1 ために V2. This is a common trap for Japanese learners!
Rule 1: Same Subject
The person doing Action 1 must be the exact same person doing Action 2.
- ✅ 寿司を食べるために日本に来ました。= I came to Japan to eat sushi.
- ❌ ケイトは寿司を食べるために私が日本に来ました。→ Wrong sentence
Rule 2: Volitional Verbs Only
Both verbs must express actions that you can consciously control. You CANNOT use potential form verbs (can do) or stative verbs (to be, to understand, etc.) before ために.
Look at these crucial right and wrong examples:
| Incorrect (❌) | Correct (✅) | Reason |
|---|---|---|
| 漢字が覚えられるために、毎日100回練習している。 | 漢字を覚えるために、毎日100回練習している。 I’m practicing kanji 100 times every day to memorize them. | ❌ 覚えられる is a potential verb. ✅ 覚える is a volitional verb. |
| 黒板の字が見えるために、前に座った。 | 黒板の字を見るために、前に座った。 I sat in the front to see the writing on the blackboard. | ❌ 見える is a potential/stative verb. ✅ 見る is a volitional verb. |
3. ～ための Noun (Noun for ~ing)
When you want to describe a noun by explaining its purpose, you use ～ための instead of ～ために.
Verb (Dictionary Form) + ための + Noun
Meaning: A [Noun] for the purpose of [Verb]ing.
The grammatical rule here is simple: When a noun follows ため, you must use the connecting particle の.
| Type | Example | ～ための |
|---|---|---|
| U-verb | 行く (to go) | 行くための |
| Ru-verb | 食べる (to eat) | 食べるための |
| Irregular verb | する (to do) | するための |
| Irregular verb | 来る (to come) | 来るための |
E.g., 漢字を練習するためのノート = A notebook for practicing kanji
4. Example Sentences
～ために (in order to do)
日本語と日本文化を勉強するために日本に来ました。
I came to Japan in order to study Japanese language and Japanese culture.
旅行に行くためにアルバイトをしています。
I am working part-time in order to go on a trip.
昔のレコードを聞くためにレコードプレーヤーを買いました。
I bought a record player in order to listen to old records.
～ための Noun (Noun for ~ing)
それ、何のアプリ？
ー 音楽を聞くためのアプリだよ。
What is that app? -> It’s an app for listening to music.
デザイナーになるための学校に行くつもりです。
I plan to go to a school for becoming a designer.
図書館は勉強したり、本を読んだりするための場所だ。
The library is a place for studying and reading books.
5. Related grammar
～ためには
By adding the topic particle は to ために, you create ～ためには. This strongly emphasizes the goal, making it the central topic of your sentence. It translates to “In order to (achieve this specific goal), it is absolutely necessary to…”
Because it highlights a requirement, the second half of the sentence almost always contains words expressing necessity, obligation, or strong advice. You will frequently see it paired with phrases like ～必要だ (is necessary), ～なければならない (must do), or ～のがいちばんだ (is best).
Example:
- 漢字を覚えるためには、毎日少しずつ勉強するのが一番です。
In order to memorize kanji, studying a little bit every day is best. - 健康に暮らすためには、適度な食事と運動、睡眠が必要です。
To live a healthy life, it is essential to eat a balanced diet, exercise regularly, and get enough sleep.
～のに
～のに means “for …-ing,” and it lets you describe the purpose or usefulness of any tool or object.
Example: このスプーンはスープを飲むのにつかいます。
We use this spoon for drinking soup.
Compare: スープを飲むためにスプーンをつかいます。
I use a spoon to eat soup.
FAQ
- QWhat is the difference between ために and ための?
- A
The difference lies in what follows them.
Use ために when it is followed by an action (verb). (e.g., 日本に行くために、お金を貯める = I save money in order to go to Japan).
Use ための when it is followed by a noun. (e.g., 日本に行くためのお金 = Money for going to Japan).
- QWhat if I want to use a potential verb (like ‘so that I can do X’)?
- A
Because you cannot use potential verbs with ために, you must use a different grammar point: ～ように (youni). For example, if you want to say “I study every day so that I can speak Japanese”, you must say: 日本語が話せるように毎日勉強する。 (Not 話せるために).
Conclusion
～ために and ～ための are powerful tools for expressing purpose and intent in Japanese. Just remember these golden rules:
- ～ために + Verb: “In order to do [Action]”
- ～ための + Noun: “A [Noun] for the purpose of [Action]”
- Only use volitional verbs! If you can’t control the action, use ～ように instead.
With these rules in mind, you can confidently explain the “why” and “what for” behind everything you do!
