How to say "disagree" in Japanese

• 異なることなるJLPT N3approx.Common
  godan verb, intransitive verbCovers 'disagree' in the sense of opinions or views differing: it presents the disagreement as a difference of position, not as an argument. Suited to describing how opinions on a plan differ between people.
  彼かれらの意見いけんは私のとは異ことなっている。↗

  Their opinions differ from mine.
• もめるJLPT N1approx.Common
  ichidan verb, intransitive verbCovers 'disagree' in the active sense: the parties dispute and fight over something rather than merely holding different views. Usually written in kana alone. Typical when people negotiating an arrangement keep clashing.
  彼かれらは財産ざいさん分わけのことでもめている。↗

  They are arguing about their share of the property.
• 違うちがうJLPT N5approx.Common
  godan verb, intransitive verbReally the word for 'to be different' or 'to be unlike'; it can state that opinions differ, but for actually disagreeing with someone it is seldom the word you want.
  その点てんでは私は君きみと意見いけんが違ちがう。↗

  I differ from you on that point.

Choose 「異なる」 when opinions or views simply differ, 「もめる」 when people actively dispute or fight over something, and 「違う」 only for its core sense of being different — it is seldom the word for disagreeing.

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

• 異なることなるto differ
• もめるto disagree
• 違うちがうto differ (from)
• 首を横に振るくびをよこにふるto shake one's head (in disagreement)
• 相反するあいはんするto be contrary