A is B. / A は B です。

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How to say “A is B.” in Japanese

A は B です。

In English, be verb should be changed according to the subject. But in Japanese, there is no variant of ~は~です。
So simply you can explain A=B, using AはBです。

“は” is a topic marker that is added after the topic word.
Topics or subjects are most omitted in Japanese sentences when it is obvious from the context.

“は” is pronounced “wa” in this case.

“~” means wildcard. This part contains one or more words.
“。” is “.”(period).

です is a polite expression of だ.
So you can say this sentence AはBだ.



I am Satoshi.

わたし [pronoun] I


He is a student.

かれ [pronoun] he
学生がくせい [noun] student

In Japanese, in many cases, we don’t distinguish singular or plural.
Only when we dare to emphasize the plural, we can add たち, ら or something(depends on the target) after the word. For example, “they” is 彼ら, “students” is 学生たち e.t.c.


She is an American.

彼女かのじょ [pronoun] She
アメリカじん [noun] American


Mr Satoshi is a Pokémon trainer.

~さん [suffix] Mr./Ms.

です can be replaced with だ(impolite) or である(story style).

If you emphasize the subject, は should be replaced with が. But you should not use が when the complement is not obvious from the previous context.



I am Tanjiro.

In Japanese, in the case the subject is obvious from the situation or previous context, the subject is almost omitted. It is unnatural not to omit the subject.

~といます [compound] (I) say (my name is) ~
~ともうします [compound] (I) say (my name is) ~ *more polite style

In the case of self-introduction, there are some more formal expressions like below. Of cause ~は~です is no problem, it is simple and not rude. The grammatical explanation is a little complicated, so I will omit it here.



わたしwatashiI95% omitted
あなたanatayou65% omitted and 30% one’s name to talk with is used instead
かれkarehealso means boyfriend
彼女かのじょkanojoshealso means girlfriend
これkorethispointing to something close to you
それsoreitpointing to something close to the person you are talking to
あれarethatpointing to something far away
Typical pronouns


先生せんせいsenseiteacher, instructor, professor, doctor
医者いしゃishadoctor, physician
弁護士べんごしbengoshilawyer, counsel
警察官けいさつかんkeisatsukanpoliceman, police officer
店員てんいんteeinclerk, salesperson
会社員かいしゃいんkaishainoffice worker, company employee
運転手うんてんしゅuntenshudriver, operator, chauffeur
料理人りょうりにんryoorinincook, chef
歌手かしゅkashusinger, vocalist
Typical occupations

Suffix words (about person)

さま~samaMr./Ms.more polite (often used in the business scene)
先生せんせい~senseeprof./doc.used for teacher, professor, doctor and author
じん~jinpeopleex. アメリカ人 is American (people)
にん~ninpeoplea number of peaple
さい~saiyears old
さい~saiyears olda simplified version of Kanji
年生ねんせい~nenseegraderex. 1年生 is a first grader
Typical pronouns


Translate the following sentences into Japanese using the “AはBです。”.

Ms.Kasumi is a police officer.

I am 25 years old.

How to say “She is Cute.” in Japanese


She is cute.

かわいい [I-adjective] cute, pretty, lovely, adorable

You have understood “A” can replace the subject of the sentence and “B” can replace the object of the sentence.
So “B” can replace not only nouns but I-adjective or Na-adjective.

です can be omitted in I-adjective sentences.
だ can be used instead of です in Na-adjective sentences.



Takeshi is big.

大きい [I-adjective] large, generous, hefty

Add ”です” to the end of the sentence for a more polite expression. (たけしは大きいです。)


Haruka is cheerful.

元気な [Na-adjective] cheerful, spry, vigorous, active, energetic

If the Na-adjective is at the end of the sentence, “な” should be transformed into “だ” or “です” at the end.
“です” is a more polite expression than “だ”. (はるかは元気です。)


JapanesePronunciationEnglishword class
かわいいkawaii cute, pretty, lovely, adorable I-adjective
おおきいookiilarge, bigI-adjective
元気げんきgenkina cheerful, spry, vigorous, active, energeticNa-adjective
親切しんせつsinsetsunakind, gracious, accommodatingNa-adjective
Typical adjectives

Click here for a detailed explanation of adjectives. [Under construction]


Translate the following sentences into Japanese using the “AはBです。”.

Hikari is kind.

Takeshi is big.

The Deeper Story of “A is B”

The grammatical structure of “A is B”

Role of “は”

Role of “は” no.1

・is a topic marker

e.g. Self-introduction


I am Yukitty.

In Japanese, modifiers are omitted as much as possible when they are obvious from the context or situation.
私は(I) is omitted. If not daringly omitted, it is emphasized.

Role of “は” no.2,3,4

・indicates contrast
・expresses the speaker’s thoughts
・indicates a choice of predicate

Role of “は” no.5

・used in a question sentence

Role of “は” no.6

・also represents the topic of the next sentence unless overwritten by a new topic marker

Role of “です” and “だ”

Role of “が”

Role of “が” no.1,2,3

is a subject marker (for specific things/person)
・indicates a logical relationship
・indicates a choice of subject

Role of “が” no.4

・is used to report what the speaker noticed

Role of “が” no.5

・is used when the interrogative is the subject

Role of “が” no.6

・is used as a subject in a sub-sentence clause