変える vs. 変わる: How to Use These Common JLPT N3 Verbs Correctly

Introduction

「予定を変える」 and 「予定が変わる」 may look almost the same.

Both expressions are related to the idea of change, but they are not used in the same way.

This difference often causes Japanese learners to make sentences such as:

「時間を変わりました。」
“The time changed.”

or:

「天気を変わりました。」
“The weather changed.”

These sentences are unnatural because 変える (kaeru) and 変わる (kawaru) play different roles in a sentence.

The key question is simple:

Does someone change something?

Or does something itself change?

Once you understand this difference, choosing between 変える and 変わる becomes much easier.

The Short Answer

「変える (kaeru / to change something)」 means that a person changes something into a different state.

「変わる (kawaru / to change)」 means that something itself becomes different.

A simple way to remember them is:

• 何かを変える
  Change something.

• 何かが変わる
  Something changes.

For example:

「私は予定を変えました。」
“I changed my plans.”

Here, 私 (I) actively changed the plans.

Compare this with:

「予定が変わりました。」
“The plans changed.”

Here, the focus is on the plans becoming different.

The particles 「を」 and 「が」 are therefore important clues.

Understanding the Difference

変える: Someone Makes Something Different

「変える (kaeru)」 is commonly used when a person intentionally changes something.

For example:

「髪型を変える」
“change one’s hairstyle”

You intentionally choose a different hairstyle.

「予定を変える」
“change one’s plans”

Someone changes the original schedule or plan.

「考え方を変える」
“change one’s way of thinking”

A person intentionally tries to think differently.

The basic image of 変える is:

Someone acts on something and makes it different.

A common sentence pattern is:

「AがBを変える」
“A changes B.”

変わる: Something Becomes Different

「変わる (kawaru)」 focuses on the fact that something has become different from before.

For example:

「天気が変わる」
“The weather changes.”

The weather moves from one condition to another.

「予定が変わる」
“The plans change.”

The original plan is no longer the same.

「考え方が変わる」
“One’s way of thinking changes.”

A person comes to think differently from before.

A common sentence pattern is:

「Aが変わる」
“A changes.”

This difference in sentence structure is one of the most important points to remember.

When Do You Use Each Verb?

Use 変える When You Intentionally Change Something

In everyday Japanese, 変える is often used when someone decides to make something different.

Common expressions include:

• 「部屋のレイアウトを変える」
  “change the room layout”

• 「パスワードを変える」
  “change a password”

• 「仕事を変える」
  “change jobs”

• 「話題を変える」
  “change the subject”

• 「勉強方法を変える」
  “change the way you study”

When there is a feeling of “I want to make this different,” 変える is usually the natural choice.

Use 変わる When Describing a Change in a Situation or State

「変わる」 is frequently used when you describe something becoming different, whether or not a particular person intentionally caused the change.

Common examples include:

• 「天気が変わる」
  “the weather changes”

• 「季節が変わる」
  “the season changes”

• 「時代が変わる」
  “the times change”

• 「状況が変わる」
  “the situation changes”

• 「ルールが変わる」
  “the rules change”

Expressions such as 「社会が変わる」, 「生活が変わる」, and 「環境が変わる」 also appear frequently in Japanese news articles and JLPT reading passages.

Both Can Be Used When Talking About People

Both 変える and 変わる can be used when talking about changes in a person’s life, habits, or personality, but the focus is different.

「私は生活習慣を変えました。」
“I changed my lifestyle habits.”

The speaker intentionally changed their habits.

Compare this with:

「私の生活習慣が変わりました。」
“My lifestyle habits changed.”

The focus is on the fact that the habits are now different.

You may also hear:

「彼は変わりました。」
“He has changed.”

This usually means that his personality, behavior, attitude, or way of thinking is different from before.

Here, we are not talking about something that he changed. We are saying that the person himself has changed.

Check the Difference with Example Sentences

Examples with 変える

「会議の時間を午後3時に変えました。」
“We changed the meeting time to 3 p.m.”

Someone changed the originally scheduled meeting time.

「最近、勉強方法を変えました。」
“I recently changed the way I study.”

The speaker intentionally started using a different study method.

「気分を変えるために、少し散歩しましょう。」
“Let’s take a short walk to change our mood.”

The speaker suggests doing something in order to create a different feeling or mood.

「この文章は少し難しいので、もっと簡単な表現に変えましょう。」
“This sentence is a little difficult, so let’s change it to a simpler expression.”

The difficult expression is intentionally replaced with an easier one.

「将来のために、生活習慣を変える必要があります。」
“I need to change my lifestyle habits for the future.”

The person needs to consciously change the way they live.

Examples with 変わる

「午後から天気が変わりました。」
“The weather changed in the afternoon.”

The weather became different from what it had been earlier.

「来月から会社のルールが変わります。」
“The company rules will change starting next month.”

The current rules will become different.

「日本に来てから、食生活が変わりました。」
“My eating habits have changed since I came to Japan.”

Living in Japan caused the person’s eating habits to become different from before.

「最近、彼の考え方が変わったと思います。」
“I think his way of thinking has changed recently.”

His way of thinking is different from what it used to be.

「時代が変われば、働き方も変わります。」
“When the times change, the way people work also changes.”

Changes in society and the times lead to changes in working styles.

Common Mistakes

Do Not Normally Use を with 変わる

A common mistake among learners is:

「予定を変わりました。」

This is unnatural.

Since 変わる describes something itself becoming different, it normally takes 「が」.

The natural sentence is:

「予定が変わりました。」
“The plans changed.”

If you want to say that you actively changed the plans, use 変える:

「予定を変えました。」
“I changed the plans.”

Remember these two patterns together:

• 「予定を変える」
  “change the plans”

• 「予定が変わる」
  “the plans change”

This pairing is extremely useful.

天気を変える and 天気が変わる Mean Very Different Things

In an ordinary situation, you would say:

「天気が変わりました。」
“The weather changed.”

The weather itself became different.

If you say:

「天気を変えました。」
“I changed the weather.”

it sounds as though someone intentionally controlled and changed the weather.

That would only make sense in a very unusual context, such as science fiction, fantasy, or technology capable of controlling weather.

This shows how 変える often implies that someone actively causes the change.

Be Careful with 考えを変える and 考えが変わる

Both expressions are natural, but their nuances are slightly different.

「私は考えを変えました。」
“I changed my mind.”

This suggests that the speaker reconsidered the situation and consciously chose a different opinion or decision.

「私の考えが変わりました。」
“My thinking changed.”

This focuses more on the result: the speaker now thinks differently from before.

For example:

「先生の話を聞いて、考えが変わりました。」
“After listening to the teacher, I changed my mind.”

This is very natural because the teacher’s explanation caused a change in the speaker’s thinking.

How to Choose on the JLPT

When you see 変える and 変わる as possible answers on the JLPT, first check the particle.

If You See を, Think of 変える

For example:

「旅行の日程を（　　　）ことにしました。」
“We decided to (　　　) the travel schedule.”

Because the sentence contains 「日程を」 and someone is intentionally modifying the schedule, the natural answer is:

「旅行の日程を変えることにしました。」
“We decided to change the travel schedule.”

If You See が, Think of 変わる

For example:

「来月から電車の時間が（　　　）そうです。」
“I heard that the train schedule will (　　　) starting next month.”

The subject is 「電車の時間が」, so the natural answer is:

「来月から電車の時間が変わるそうです。」
“I heard that the train schedule will change starting next month.”

Ask Who Is Causing the Change

Sometimes the particle alone is not enough.

In that case, ask yourself:

Is someone intentionally changing something?

If yes, 変える is likely to be correct.

Is a thing, situation, or state becoming different?

If yes, 変わる is likely to be correct.

Compare:

「店長は店の営業時間を変える。」
“The manager changes the store’s business hours.”

The manager actively changes them.

But:

「来月から店の営業時間が変わる。」
“The store’s business hours will change starting next month.”

The focus is on the business hours becoming different.

Use These Two Patterns When You Are Unsure

If you get stuck during the JLPT, quickly test the sentence using these patterns:

「誰かが○○を変える」
“Someone changes ○○.”

「○○が変わる」
“○○ changes.”

Then ask which pattern matches the meaning of the sentence.

This simple check can help you avoid many mistakes.

Summary

The main difference between 「変える」 and 「変わる」 is whether someone causes a change or something itself changes.

• 「変える (kaeru)」 = someone makes something different
• 「変わる (kawaru)」 = something becomes different
• Remember 「○○を変える」 and 「○○が変わる」 as a pair
• When someone intentionally changes something, choose 変える
• When describing a change in a state or situation, choose 変わる

Even when both verbs can be used with the same noun, as in 「予定を変える」 and 「予定が変わる」, the focus of the sentence is different.

On the JLPT, understanding small differences like these can make the difference between two very similar answer choices.

Instead of memorizing vocabulary only through definitions, practice deciding which word fits naturally into an actual sentence.

RJT (Rapid Japanese Training) is designed to help you build exactly this kind of practical judgment. You can work through JLPT-style questions one at a time and train yourself to recognize the correct vocabulary and grammar from context.

If you often think, “I know both words, but I still choose the wrong one in a test,” try building your instincts through repeated practice on RJT.

https://rapid-jt.com/