にする

にする means make something become. It is a JLPT N4 Japanese grammar pattern used to express the idea of “to make something into; make it” in natural Japanese.

This grammar point appears in conversation, written explanations, formal notices, and JLPT-style reading questions. If you want to express the idea of “to make something into; make it” in natural Japanese, にする is a useful pattern to learn after the N5 basics.

What does にする mean?

Use にする when you want to express the idea of “to make something into; make it” in natural Japanese.

Natural translations include:

• to make something
• to make something into; make it

The exact English translation changes with context. Focus on what the grammar point does in the sentence first, then choose the English phrase that sounds natural.

How to form にする

Examples of the pattern:

• きれいにする
• 明日にする
• カレーにする

Pay attention to the word form before the pattern. Many JLPT N4 mistakes happen because the meaning is understood, but the grammar is attached to the wrong form.

When is にする used?

Use にする in situations like:

• making a decision about what something will become
• specifying a condition, time, or state
• understanding natural Japanese in conversation or reading

Tone and register:

• neutral; common in daily speech, textbook examples, and JLPT N4 reading questions
• works in polite, casual, and formal contexts depending on the verb ending

にする example sentences

Read the Japanese sentence first, then check the English translation. Try to notice what the grammar point contributes: decision, condition, time, or change.

Nuance of にする

The key nuance is to make something into; make it in a sentence-specific context.

This matters because にする may look simple in English, but the Japanese form tells you whether the speaker is describing a time, a condition, a decision, or a change of state.

For example:

• In context, にする helps make the sentence more precise than a direct English translation.
• Compared with くする, it has a different focus even when both patterns appear in similar sentences.

にする vs くする

Both にする and くする can appear in related sentences, but they are different.

If you are unsure which one to use, identify the main job of the sentence before translating it into English.

Common mistakes with にする

A good study habit is to write one short sentence and then change only the grammar point. This makes the difference between similar patterns easier to feel.

Is にする on the JLPT?

For test preparation, do not only memorize the English gloss. Practice identifying the words around the grammar point, because JLPT questions often test structure and context together.

Practice questions for にする

Keep the sentences short at first. Once the form feels natural, add time words, places, reasons, or contrast to make the sentence more realistic.

Learning path for にする

For practice, write one sentence that uses にする in its most literal meaning, one sentence that changes the subject or time expression, and one sentence that contrasts it with one of the related patterns below.

Related grammar to review next

• ことになる — connects to change, decision, planning, or effort over time.
• くする — connects to change, decision, planning, or effort over time.
• ようと思う — connects to change, decision, planning, or effort over time.
• 意向形 — connects to change, decision, planning, or effort over time.

Learn にする with Hane

If you want to review にする together with the related patterns above, Hane helps you practice Japanese in short, focused sessions.

Browse more lessons here:

• All grammar lessons
• JLPT N4 grammar lessons