The Meaning of onaji [同じ] In Japanese

同じ
おなじ
Romaji: onaji N5

What does 同じ mean?

Translation and Meaning

same, identical, equal

Definition

What does 同じ (onaji) mean? 同じ (onaji) is used to state that two or more items share identity or are equal in kind, quantity, quality, or state; it functions both as a modifier before a noun and as a predicate with the copula to declare equivalence between things.

Type

adjective (na-adjective / adjectival noun, 形容動詞)

Stroke Order

Meanings

  • Equality in degree or amount (used with comparatives and quantifiers to say something is equally large, frequent, or intense).
  • Similarity of manner or way when extended with forms like the construction that conveys ‘in the same way’ or ‘similarly’.
  • Pronominal use to pick out ‘the same one’ or ‘the very same’ when referring back to a previously mentioned item.
  • Fixed/formal adverbial use in written registers to mean ‘likewise’ or ‘similarly’ when paired with certain endings.

Composition

  • 同 — the kanji conveys togetherness or sameness; used here as the semantic core that signals sharedness.
  • The okurigana じ serves as the reading/inflectional ending that turns the character into a modifier/predicate form, allowing it to attach to nouns or combine with a copula for predicative use.

Usage

Used across casual and polite speech and in writing, 同じ (onaji) appears before nouns to modify them and after nouns with a copula to state equality; common grammatical patterns include a construction that marks two elements as equal and comparative expressions that attach degree markers to express ‘as…as’ or ‘about the same’; in formal writing an adverbial variant conveys ‘likewise’, while in casual speech the copula can be dropped for brevity.
💡 Tips
Remember 同じ (onaji) by picturing two identical objects stamped with the same label ‘ONAJI’ — same label = same thing.

Variations

  • 同様 (douyou) — similar, in the same manner
  • 同一 (douitsu) — identical, the same entity
  • 一緒 (issho) — together / the same time (more about being together than identical)
  • 別 (betsu) — different (antonym)

Example Phrases

  • 度々コンビニで同じ商品を買ってしまう。
    Tabitabi konbini de onaji shouhin o katte shimau.
    I keep buying the same item at the convenience store.
    Lista:
    • 度々 (tabitabi) – frequently
    • コンビニ (konbini) – convenience store
    • で (de) – at
    • 同じ (onaji) – same
    • 商品 (shouhin) – item
    • を (wo) – object marker
    • 買ってしまう (katte shimau) – end up buying
    「度々」 means ‘frequently’; here it prefixes the verb phrase to describe repeated action.
同じ