A1 Expression 격식체

〜です

~desu

It is ~

Phrase in 30 Seconds

The essential polite ending for Japanese sentences, used to state facts or identities respectfully.

  • Means: A polite marker indicating a statement or state of being.
  • Used in: Introducing yourself, describing objects, and speaking to strangers or superiors.
  • Don't confuse: Do not use with verbs; use 'masu' for verbs instead.
Noun + です = Polite Statement

Explanation at your level:

Desu is the polite way to end a sentence. You use it when you talk to people you do not know well. It makes your Japanese sound kind and respectful.
As a copula, 'desu' functions to link a subject to a predicate. It is essential for forming polite sentences with nouns and adjectives. Unlike verbs, which use the 'masu' suffix, 'desu' is reserved for non-verbal predicates, ensuring grammatical consistency in polite speech.
The copula 'desu' is a fundamental component of 'teineigo'. It serves as a marker of social distance. By appending 'desu', the speaker acknowledges the listener's status, which is a cornerstone of Japanese social interaction. Mastery involves knowing when to switch to the plain form 'da' to signal intimacy.
In sociolinguistic terms, 'desu' is a marker of 'politeness strategy'. It functions to mitigate the directness of a statement. In professional environments, the absence of 'desu' can be interpreted as a breach of etiquette. Advanced learners must navigate the nuance between 'desu' and more formal variants like 'de gozaimasu'.
The usage of 'desu' reflects the Japanese concept of 'uchi-soto' (inside-outside). It is the linguistic boundary marker. When a speaker uses 'desu', they are positioning themselves in the 'soto' (outside) realm, maintaining a formal facade. The transition from 'desu' to 'da' is a critical indicator of shifting interpersonal dynamics.
From a cognitive linguistics perspective, 'desu' acts as a grammaticalized politeness index. It is not merely a copula but a pragmatic particle that frames the entire utterance within a specific social register. Its usage is governed by complex variables including relative social hierarchy, situational formality, and the speaker's intent to either maintain or collapse social distance.

뜻

Basic sentence ending for polite statements.

🌍

문화적 배경

Using 'desu' is a sign of respect for the listener's social standing.

💡

Devoicing

The 'u' in 'desu' is often silent.

뜻

Basic sentence ending for polite statements.

💡

Devoicing

The 'u' in 'desu' is often silent.

셀프 테스트

Complete the sentence.

Watashi wa gakusei ____.

✓ 정답! ✗ 아쉬워요. 정답: desu

Use 'desu' for polite statements.

🎉 점수: /1

자주 묻는 질문

1 질문

No, use masu.

관련 표현

🔗

Deshita

specialized form

Past tense of desu

어디서 쓸까?

🤝

Meeting a new colleague

A: Tanaka desu. Yoroshiku.

B: Sato desu. Kochira koso.

formal

Memorize It

Mnemonic

Think of 'Desu' as 'De-suit'—you are wearing a polite suit when you use it.

Visual Association

Imagine a person bowing slightly every time they finish a sentence with 'desu'.

Rhyme

When you want to be polite, use 'desu' with all your might.

Story

Kenji is at a party. He meets a stranger. He says 'Hajimemashite, Kenji desu.' The stranger smiles because Kenji is being polite. Kenji feels confident.

Word Web

deshitadewa arimasenmasudadeshoudesu ne

챌린지

Write 5 sentences about things in your room using 'desu'.

In Other Languages

Spanish moderate

Ser/Estar

Japanese 'desu' does not change based on the subject.

French moderate

Être

Japanese 'desu' is invariant.

German moderate

Sein

Japanese 'desu' is not inflected by person.

Chinese high

是 (shì)

Japanese 'desu' is placed at the end of the sentence.

Korean high

입니다 (imnida)

They are almost identical in usage and position.

Portuguese moderate

Ser/Estar

Japanese 'desu' covers both without distinction.

Arabic low

Nominal sentence structure

Japanese requires the copula 'desu' for politeness.

English moderate

To be

English is SVO; Japanese is SOV with 'desu' at the end.

Easily Confused

〜です 대 Da

Learners mix up polite and casual.

Use 'desu' for strangers, 'da' for friends.

자주 묻는 질문 (1)

No, use masu.

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