How to say "perfect" in Japanese

• 完全かんぜんJLPT N3approx.Common
  na-adjective, no-adjectiveCovers 'perfect' as 'complete' — whole, with nothing missing or lacking — rather than 'flawless'. Very often it appears adverbially, where English would say 'completely' or 'totally'.
  そして書かかれていることはすべて完全かんぜんにはっきりと書かかれている。↗

  And then everything that was written was completely clear.
• 完璧かんぺきJLPT N1approx.Common
  na-adjective, nounThe word for 'perfect' as 'flawless' — without a single defect or mistake. The natural choice when praising a plan, performance, or piece of work that could not be improved.
  君きみは完璧かんぺきな仕事しごとをしてくれた。↗

  You've done a perfect job.
• パーフェクトCommon
  na-adjective, nounThe katakana loanword, used much like the English word itself; a natural pick in casual speech, catchphrases, and set phrases where the borrowed term's flavor feels right.
  容姿ようし端麗たんれい、頭脳ずのう明晰めいせき、運動うんどう神経しんけい抜群ばつぐん、家いえは金持かねもちで、ついでに学生がくせい会かいの副会長ふくかいちょうをしてたりもする、いわゆるパーフェクトな奴やつだ。↗

  Looks, brains, reflexes, rich family and, for good measure, vice president of the student committee - in other words he's 'perfect'.
• 絶妙ぜつみょうCommon
  na-adjective, no-adjectiveCovers 'perfect' as 'exquisite' or 'superb' — exquisitely fine or superbly judged, with a hint of the miraculous. Suits subtle results such as perfect timing, balance, or wording, not overall flawlessness.
• 絶好ぜっこうCommon
  no-adjective, na-adjectiveCovers 'perfect' meaning 'ideal' or 'best' — ideal conditions or a perfect opportunity, as with fine weather or a favorable chance. It says circumstances could hardly be better, not that something is flawless.
  絶好ぜっこうの機会きかいを逃のがした。↗

  I missed a golden opportunity.

Use 完全 for 'perfect' meaning complete, 完璧 for flawless, 「パーフェクト」 as the English-style loanword, 絶妙 for exquisitely judged results, and 絶好 for ideal conditions or opportunities.

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

• 完全かんぜんperfect
• 完璧かんぺきperfect
• パーフェクトperfect
• 絶妙ぜつみょうexquisite
• 絶好ぜっこうbest
• 申し分ないもうしぶんないperfect
• 申し分のないもうしぶんのないperfect
• 文句なしもんくなしundisputed
• うってつけideal
• あつらえ向きあつらえむきperfect (for)
• 至れり尽くせりいたれりつくせりperfect
• パーぺきperfect
• おあつらえ向きおあつらえむきperfect (for)
• 真んまんperfect
• こよないbest
• 全いまったいcomplete
• 非の打ち所がないひのうちどころがないfaultless
• 金甌無欠きんおうむけつflawless
• そつがないcautious
• そつのないcautious
• 寸分違わぬすんぶんたがわぬexactly the same
• 文句のつけようがないもんくのつけようがないblameless
• 非の打ち所のないひのうちどころのないimpeccable
• 完了かんりょうperfect (tense)
• 満点まんてんperfect
• 無傷むきずflawless (e.g. gem)
• どストライクperfect (for something or someone)
• 赤あかcomplete