必要(ひつよう)

ひつよう
na-adjective
necessary, needed
descriptive
1. necessary, needed, required
Essential or required for a purpose. Can function as a na-adjective or noun.
お金(かね)が必要(ひつよう)です。
I need money.
それは必要(ひつよう)ありません。
That's not necessary.
必要(ひつよう)な物(もの)を買(か)いました。
I bought the things I needed.
na-adjective modifying noun
この仕事(しごと)には車(くるま)が必要(ひつよう)です。
A car is necessary for this job.
日本(にほん)に行(い)くなら、日本語(にほんご)を勉強(べんきょう)する必要(ひつよう)があります。まず言葉(ことば)を覚(おぼ)えましょう。
If you're going to Japan, you need to study Japanese. Let's start by learning the language.
必要がある = there is a need to

Usage

必要(ひつよう) works as both a na-adjective and a noun. As a na-adjective it takes だ/です (時間(じかん)が必要(ひつよう)です, "time is needed") and modifies a noun with な (必要(ひつよう)な物(もの), "necessary things"). As a noun it heads 必要(ひつよう)がある ("there is a need to"). The frame is XがYに必要(ひつよう)だ: "X is necessary for Y." For a plain "I need X" in conversation, Xが要(い)る is often more natural.

Common patterns

  • [noun]が必要(ひつよう)だ: [noun] is necessary
  • 必要(ひつよう)な[noun]: necessary [noun]
  • [verb]必要(ひつよう)がある: it is necessary to [verb]
  • [verb]必要(ひつよう)はない: there is no need to [verb]
  • 必要(ひつよう)に応(おう)じて: as needed

Compounds

Similar words

Related Words

Antonym: 不必要(ふひつよう) (unnecessary)
Antonym: 不要(ふよう) (unnecessary)
Related: 不可欠(ふかけつ) (indispensable (formal))
Compare: 必需(ひつじゅ) (necessity)
basic
Added 2026.1.7 21:09 · Revised 2026.9.29 18:11
00500/00846_hitsuyou