Have you ever been in a situation where you really, really needed something?

Maybe it’s a strong cup of coffee before your morning Japanese lesson.
Or perhaps you realized you’re missing one crucial ingredient for that delicious ramen you’re making.

When you want to say something is "necessary" or that you "need" to do something in a way that sounds a bit more grown-up than just saying ほしい (hoshii / want), that’s where 必要 (ひつよう / hitsuyou) comes in!

It’s an essential N4 word that helps you talk about requirements and necessities.

Whether you’re talking about what you need for a trip or what's necessary for your future goals, this word is a must-have in your vocabulary toolkit.

Let’s dive in and see how it works!

いる (iru) vs 必要 (hitsuyou)
These two expressions are very similar.
Both いる and 必要 mean “to need,” but the key difference is how objective the situation is.

いる (iru)
いる is a verb used very commonly in daily conversation.
It sounds casual, direct, and personal, focusing on what you need right now.

お金がいる。
おかね が いる。
okane ga iru.
I need money.

Use いる for everyday needs and casual situations.

必要 (hitsuyou)
必要 sounds more formal and objective.
It is often used to explain requirements, conditions, or logical necessity, rather than personal wants.

ビザの申請にはお金が必要です。
びざ の しんせい に は おかね が ひつよう です。
biza no shinsei ni ha okane ga hitsuyou desu.
Money is necessary for the visa application.

Use 必要 when talking about rules, requirements, or things that must be done.

海外旅行にはパスポートが必要です。
かいがい りょこう に は ぱすぽーと が ひつよう です。
kaigai ryokou ni ha pasupo-to ga hitsuyou desu.
A passport is necessary for overseas travel.

この部屋に入るには、許可が必要だ。
この へや に はいる に は、きょか が ひつよう だ。
kono heya ni hairu ni ha, kyoka ga hitsuyou da.
Permission is necessary to enter this room.

この教科書、僕にはもう必要ないからあげるよ。
この きょうかしょ、ぼく に は もう ひつよう ない から あげる よ。
kono kyoukasho, boku ni ha mou hitsuyou nai kara ageru yo.
I don’t need this textbook anymore, so I’ll give it to you.

明日は早く起きる必要があります。
あした は はやく おきる ひつよう が あります。
ashita ha hayaku okiru hitsuyou ga arimasu.
I need to wake up early tomorrow.

締め切りは来月なので、いま急ぐ必要はありませんよ。
しめきり は らいげつ な の で、いま いそぐ ひつよう は ありません よ。
shimekiri ha raigetsu na node, ima isogu hitsuyou ha arimasen yo.
The deadline is next month, so there’s no need to rush now.

無理をしてまで行く必要はない。
むり を して まで いく ひつよう は ない。
muri wo shite made iku hitsuyou ha nai.
There’s no need to push yourself to go.

• Grammar Point: 必要 (ひつよう / hitsuyou)
  
• JLPT Level: N4
• Meaning: Need, necessary
  
• Quick Explanation: Use 必要 to state that something is a requirement. Use it with が あります for actions (verbs) or です for things (nouns).
  
  

So that’s how we use 必要!
It’s a very useful word for talking about requirements, conditions, and things that truly matter.

健康のために運動が必要です。私は毎週ランニングしています。
けんこうのためにうんどうがひつようです。わたしはまいしゅうらんにんぐしています。
Kenkou no tame ni undou ga hitsuyou desu. Watashi wa maishuu ranningu shiteimasu.
Exercise is necessary for your health. I go running every week.

Now, it’s your turn! What do you think is 必要 for learning Japanese?
Try making your own sentence.

Your Sensei,
Hikari 👩🏻‍🏫✨

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