正直|しょうじきshoujiki[3]nakadaka (mid-high)

1. na-adjective, nounhonest; frank; candid; straightforward
   その事実じじつは彼かれの正直しょうじきさを証明しょうめいしている。↗

   The fact proves his honesty.
2. adverbhonestly; frankly
   正直しょうじき言いって私はクラシック音楽おんがくが好すきじゃない。かたや、モリーの方ほうが完全かんぜんにはまっている。↗

   To tell the truth, I don't like classical music. On the other hand, Molly is really into it.

• Synonym率直そっちょくNeutralAbout how you express yourself — frank and direct, as in 「率直な意見」. 「正直」 centers on not lying; 率直 centers on the way you speak.
• SynonymストレートNeutralLoanword for saying things directly, as in 「ストレートに言う」. Also covers a straight fastball and straight wins — senses 「正直」 doesn't have.
• SynonymフランクNeutralLoanword for an open, easygoing manner, as in 「フランクな人」. Stresses being relaxed and unreserved with people rather than being truthful.
• Synonym実直じっちょくNeutralHonest and steady, a dependable, hardworking character, as in 「実直な人柄」. Stresses steadiness and reliability more than truth-telling.
• Synonym素直すなおNeutralAn open, uncontrary nature that takes what others say at face value, as in 「素直な子」. Focuses on being cooperative and unpretentious, not on not lying.
• Synonym律儀りちぎNeutralDutiful and faithful — honoring obligations and keeping promises, as in 「律儀な人」. 「正直」 is about not lying; 律儀 is about loyalty to duty.
• Synonym良心的りょうしんてきNeutralConscientious and fair, often said of shops and prices, as in 「良心的な店」. Usually implies decent treatment of customers rather than personal honesty.
• Synonym堅気かたぎNeutralA person in a respectable, legitimate occupation, as in 「堅気の人」 — contrasted with the underworld. It does not mean being frank in speech.
• Synonym真正直ましょうじきNeutralEmphatic form: utterly honest, not telling even the smallest lie. Stronger in degree than 「正直」.
• Synonym真っ正直まっしょうじきNeutralEmphatic form meaning honest to the utmost degree. Essentially the same as 「真正直」, and stronger than 「正直」.
• SynonymざっくばらんNeutralColloquial word for talking openly and holding nothing back, as in 「ざっくばらんに話す」. Suggests a casual, unreserved tone rather than honesty about facts.
• Related単刀直入たんとうちょくにゅうNeutralFour-character idiom for going straight to the point with no preamble, as in 「単刀直入に言う」. It stresses not beating around the bush, not honesty itself.
• Related誠実せいじつNeutralSincere and dependable, as in 「誠実な対応」. The stress is on earnestness and responsibility; 「正直」 is specifically about not lying.
• Related公明正大こうめいせいだいWrittenFour-character idiom for acting fairly and aboveboard with nothing to hide. Often used for one's conduct in official or political matters.
• Related清廉せいれんWrittenClean-handed and free of selfish greed, as in 「清廉潔白」. Typically describes officials and public figures rather than everyday honesty.
• RelatedズバリNeutralColloquial adverb for hitting the nail on the head, as in 「ズバリ言う」. Describes how something is said — bluntly and to the point.
• Related廉潔れんけつWrittenWritten/formal word for incorruptible integrity, used rarely. Like 「清廉」 it belongs to formal prose; in speech people say 「正直」.
• Related篤実とくじつWrittenWritten/formal word for a warm, sincere and honest character. Mostly describes a person's moral makeup rather than everyday behavior.
• Related真率しんそつWrittenRare literary word for sincere frankness. In daily conversation say 「率直」 or 「正直」 instead.
• Antonym嘘つきうそつきNeutralAntonym: a person who habitually lies. The direct opposite of being 「正直」.
• Antonym不誠実ふせいじつNeutralAntonym: dishonest and irresponsible, as in 「不誠実な態度」. Opposes both 「正直」 and 「誠実」.

Default to 「正直」 for being honest and not lying. For frankness in how you speak, use 「率直」, 「ストレート」, 「単刀直入」 or 「ズバリ」; for an easygoing, open manner, 「フランク」 or 「ざっくばらん」. For sincerity and dependability use 「誠実」 (or 「実直」 for a steady character, 「素直」 for an uncontrary, cooperative one). 「真正直」 and 「真っ正直」 are emphatic forms meaning completely honest. Formal words like 「公明正大」, 「清廉」 and 「廉潔」 suit writing about integrity. The antonyms are 「嘘つき」 (liar) and 「不誠実」 (dishonest).

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

1. （しょうじき、古ふるくは:せいちょく）嘘うそ・偽いつわりのないこと。
2. （しょうじき）壁かべや柱はしらが垂直すいちょくかどうか調しらべるために使つかう道具どうぐ。下げ振さげふり。
3. 本当ほんとうのところ。率直そっちょくに言いって。
4. 正直しょうじきに。率直そっちょくに。