How to say "either" in Japanese

• いずれかCommon
  expressionThe common word for 'either (of)': choosing one from the options at hand. It also means 'any (one of)', so, unlike two-way どちらか, it is not limited to two choices; usually written in kana.
  選えらぶべき道みちはただ１つ成功せいこうか死しかのいずれか。↗

  The only alternatives are success and death.
• どちらか
  nounFor 'either' when exactly two alternatives are in play — 'one (of the two)'. Typical when you ask someone to choose between two options or say that one or the other is the case.
  君きみか彼かれのどちらかがまちがっている。↗

  Either you or he is wrong.
• どちらでも
  expressionHandles 'either' as an expression of no preference between two options: 'either (one) is fine', 'whichever'. What you say when someone asks which of two you want and you don't mind.
• どれも
  adverbReally means 'any' or 'all' across a set of options, so its link to 'either' is loose: it treats every option alike rather than picking one of two, for which どちらか is the fit.
  その本ほんはどれも読よんでない。↗

  I have not read all the books.
• やっぱ
  adverbA shortened form of やっぱり; its 'either' is the additive 'too, likewise' sense, as in 'I don't like it, either' — it is not a way to say 'one of the two'.

For choosing one from options, use 「いずれか」 (two or more) or 「どちらか」 (exactly two); 「どちらでも」 means either is fine; 「どれも」 means any or all of a set; 「やっぱ」 covers only the additive 'too/either'.

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

• いずれかone (of)
• どちらかeither
• どちらでもeither
• どれもany
• やっぱtoo