noun じゃないです noun ではありません
Grammar Pattern
is not; am not; are not
noun じゃないです noun ではありません
is not; am not; are not
Formal
Explanation
This structure is used to negate statements where the predicate is a noun.
じゃないです and ではありません both negate the copula です.
じゃないです is more casual and conversational.
ではありません is more formal and is preferred in writing or polite situations.
These forms must follow a noun and cannot stand alone.
Formation
Noun + じゃないです
Noun + ではありません
Usage Notes
These forms are used only to negate noun-based sentences.
They cannot be used to negate verbs or adjectives.
じゃないです is commonly used in spoken Japanese.
ではありません is more formal and often used in writing or careful speech.
In answers to questions, the noun must be stated; these forms do not stand alone.
Parts of Speech
Noun