How to say "grammatical" in Japanese

• 文法的ぶんぽうてき
  na-adjectiveThe plain adjective 'grammatical': 文法 'grammar' plus the adjectival ending 的. It describes something as relating to grammar or viewed in grammatical terms, typical in the discussion or analysis of language.
  この文ぶんは文法的ぶんぽうてきに正ただしい。↗

  This sentence is grammatically correct.
• 文法上ぶんぽうじょう
  no-adjectiveMeans 'in terms of grammar' or 'as far as grammar is concerned' (文法 'grammar' plus 上 'from the standpoint of'); it overlaps broadly with 文法的 in framing things as matters of grammar.

Both are less common equivalents of 'grammatical' and overlap considerably: 文法的 is the plain adjective 'pertaining to grammar', while 文法上 means 'in terms of grammar' or 'as far as grammar is concerned'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 文法的ぶんぽうてきgrammatical
• 文法上ぶんぽうじょうgrammatical