Japanese Relative Clauses
Japanese relative clauses (関係節) come BEFORE the noun they modify — the opposite of English. Any verb clause can act as a modifier by simply placing it before a noun in plain form.
Relative clauses precede the noun
In English: "the book [that I read]" — the clause comes after. In Japanese: "[私が読んだ] 本" — the clause comes before. The modifying verb must be in plain (dictionary or ta) form regardless of sentence politeness level.
The の nominaliser in relative clauses
の can nominalise an entire relative clause, turning a verb clause into a noun phrase. This is different from the possessive の.
Common mistakes
食べますパン (polite form before noun)
Right食べるパン (plain form before noun)
Relative clause verbs must be in plain form even when the main sentence is polite. Using ます-form before a noun is a very common mistake.
Forgetting が→の substitution in relative clause
RightBoth が and の mark subjects in relative clauses
Inside a relative clause, the subject can optionally be marked with の instead of が: 私が読んだ = 私の読んだ. Both are correct; の sounds slightly more literary.
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How do Japanese relative clauses work?
Japanese relative clauses precede the noun they modify and use plain verb forms. There is no relative pronoun (no "that", "which", "who") — the clause simply sits before the noun: [昨日食べた]ケーキ = the cake [I ate yesterday].
What tense do I use in a Japanese relative clause?
Use plain present (dictionary form) for habits or ongoing states, and plain past (た-form) for completed actions. The tense of the relative clause is independent of the main clause tense.