How to say "truly" in Japanese

Choosing the right word
  • まったくJLPT N3approx.Common
    adverb, no-adjectiveIts core sense is 'entirely, completely', stressing totality, and it also stands alone as an exclamation of exasperation. When 'truly' means 'genuinely', this is seldom the word you want.
    彼かれの意見いけんは我々われわれの意見いけんとはまったく違ちがっている。↗
    His opinion is quite different from ours.
  • 誠にまことにJLPT N1approx.Common
    adverbCovers 'truly' as deep, felt sincerity, and 'very, extremely'. Typical in earnest apologies and thanks, where it gives the statement weight.
    I'm awfully sorry that I was late.
  • 実にじつにJLPT N3approx.Common
    adverbCovers 'truly' and 'indeed' when you react to how something strikes you, intensifying an evaluative comment — the sense of finding something truly wonderful.
    今日きょうは実じつによい天気てんきだ。↗
    It is truly a nice day today.
  • いかにもJLPT N1approx.Common
    adverbCovers 'indeed, truly' when conceding or agreeing that something is so, and 'just (like)' for what is typical of its kind. Usually written in kana alone.
    こんな格好かっこうをしているといかにもスポーツしてそうに見みえるけど、全然ぜんぜんやってないんだよ。↗
    I look for all the world like an athlete in this outfit, but the truth is I don't do any sports at all.
  • 本当にほんとうにCommon
    adverbCovers the plain senses 'really' and 'truly': asking 'really?', emphasizing a statement, or expressing genuine feeling. When you simply mean 'really' or 'truly', this is the word to reach for.
    あなた達たちは本当ほんとうに素敵すてきなお客きゃくだ。↗
    You're such a lovely audience.

Use 「本当に」 for the plain 'really, genuinely'; 「誠に」 for weighty, sincere 'truly'; 「実に」 and 「いかにも」 for 'indeed' in evaluation or concession; 「まったく」 is really 'entirely, completely', seldom 'truly'.

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

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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