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N4Lesson notes · Oct 4, 2026

Honest in Japanese: 正直しょうじき (しょうじき), and why 素直すなお is not the same word

"Honest" in Japanese is 正直しょうじき (しょうじき): 正直しょうじきな人ひと means "an honest person", and 正直しょうじきに言いうと or just 正直しょうじき、… is how you say "to be honest" at the start of a sentence.

Most learners meet 正直しょうじき as a plain adjective and stop there. In real conversation it works more like a verbal drum roll: a small word that tells the listener "I'm about to say the real thing". That second use is the one you will hear every day, and it is the one this post focuses on. Along the way we sort out the words that get mixed up with it: 素直すなお (sunao), 誠実せいじつ (seijitsu), ぶっちゃけ, and the opposite family, 嘘うそ and 嘘うそつき.

What does 正直しょうじき mean, and how do you use it?

Is 正直しょうじき an adjective or a noun?

It is both, in the way な-adjectives usually are. 正直しょうじき describes a person who does not lie or hide things, and it takes な before a noun and に before a verb.

彼かれは正直しょうじきな人ひとです。 — He is an honest person. (polite, describing character) 正直しょうじきに答こたえてください。 — Please answer honestly. (polite, adverb use with に)

The kanji give you the picture: 正せい (correct, straight) and 直ちょく (direct, straight). Honesty here is being straight, with nothing bent or hidden. If the な-adjective pattern is new to you, our guide to personality adjectives in Japanese shows the same pattern with many more words.

How do you say "to be honest" in Japanese?

Say 正直しょうじきに言いうと (しょうじきにいうと), or shorten it to 正直しょうじき、… with a small pause. Both open the sentence and warn the listener that a frank opinion is coming.

正直しょうじきに言いうと、あまり好すきじゃないです。 — To be honest, I don't like it very much. (polite, softening a negative opinion) 正直しょうじき、ちょっと疲つかれました。 — Honestly, I'm a bit tired. (polite-casual, the everyday short form) 正直しょうじき、わからない。 — Honestly, I don't know. (casual, friends)

Notice that the short 正直しょうじき、 is not a full adjective use anymore. It behaves like an adverb sitting at the front of the sentence, and that is exactly why it is so useful: you can attach it to almost any opinion.

Where will you actually hear it?

You will hear it most when someone is about to say something slightly uncomfortable: an opinion on a restaurant, a movie, a plan, or a mistake. It gives the other person a signal that the next part is not the polite surface answer.

正直しょうじき、このプランはむずかしいと思おもいます。 — Honestly, I think this plan is difficult. (polite, work setting, gentle disagreement) 正直しょうじきなところ、よくわかりませんでした。 — To tell the truth, I didn't really understand. (polite, a slightly more careful version of 正直しょうじきに言いうと)

Beyond the basics

What is ぶっちゃけ?

ぶっちゃけ is the casual, slangy cousin of 正直しょうじき: "frankly" or "to be real". It is thought to come from 打うち明あける (to confide) or ぶち開あける, a blunt version of "open up and say it", and it is common among friends, in social media, and in anime.

ぶっちゃけ、あの映画えいがはつまらなかった。 — Frankly, that movie was boring. (casual, friends, a bit blunt) ぶっちゃけ、お金かねがない。 — Let's be real, I have no money. (very casual, joking tone)

The difference is register. 正直しょうじき works with a teacher, a coworker, or a stranger. ぶっちゃけ is for people you are comfortable with. Using ぶっちゃけ in a job interview would sound careless.

How do you say "tell the truth"?

Use 本当ほんとうのことを言いう (ほんとうのことをいう), literally "say the real thing". It is a plain phrase and works at every level of politeness.

本当ほんとうのことを言いってください。 — Please tell me the truth. (polite, serious request) 本当ほんとうのことを言いうと、まだ決きめていません。 — To tell the truth, I haven't decided yet. (polite, another "to be honest" opener)

本当ほんとうのことを言いうと and 正直しょうじきに言いうと overlap a lot. 正直しょうじき feels a little more about your own feelings and opinions, while 本当ほんとうのこと points at facts.

How does 正直しょうじき sound in anime?

In anime, 正直しょうじきに言いえ! is the classic interrogation line: "Tell the truth!" It is the imperative of 言いう, so it is rough and commanding, something a detective or an angry rival says to someone who is hiding something.

正直しょうじきに言いえ! 誰だれがやった? — Tell the truth! Who did it? (rough command, tense scene) 正直しょうじきに話はなしてくれ。 — Please be honest with me. (casual male speech, softer than 言いえ but still serious)

You will also hear characters say 正直者しょうじきもの (しょうじきもの), "an honest person", often with a hint of "too honest for their own good". And a common emotional beat is a character finally admitting a feeling with 正直しょうじき、寂さびしかった, "honestly, I was lonely".

What is the opposite of 正直しょうじき?

The opposite family is 嘘うそ (うそ), "a lie", and 嘘うそつき (うそつき), "a liar". 正直しょうじきじゃない is possible but sounds oddly indirect; Japanese usually names the lie instead.

それは嘘うそでしょう? — That's a lie, isn't it? (polite, doubtful, a gentle challenge) 嘘うそつき! — Liar! (casual, strong accusation, anime favorite) 嘘うそをつかないでください。 — Please don't lie. (polite, direct request)

The verb is 嘘うそをつく, "to tell a lie". Be careful: 嘘うそつき is a harsh word between adults, much more direct than "you're lying" sounds in English.

Isn't 本音ほんね the same thing?

Not exactly: 本音ほんね (ほんね) is a person's true feelings, the thing underneath what they say aloud. 正直しょうじき is about whether you speak openly; 本音ほんね is the content you might be hiding. We cover the full idea in honne and tatemae, and the two fit together: 正直しょうじきに本音ほんねを言いう means "to say your true feelings honestly".

What is the difference between 正直しょうじき, 素直すなお and 誠実せいじつ?

How is 素直すなお different from 正直しょうじき?

素直すなお (すなお) means straightforward and receptive: taking things as they are and not pushing back. It is close to "honest" only in phrases like 素直すなおに認みとめる (to admit it openly); it is not the same as 正直しょうじき, which is about not lying. A 素直すなおな人ひと accepts advice, admits mistakes, and does not argue for the sake of it. A 正直しょうじきな人ひと does not lie. These are different qualities, even though English "honest" can sometimes cover both.

彼女かのじょは素直すなおな子こです。 — She is an obedient, open-hearted child. (polite, praising character, not about lying) 素直すなおに謝あやまりました。 — I apologized without making excuses. (polite, "素直すなおに" means openly, without resistance) 彼かれは正直しょうじきだけど、素直すなおじゃない。 — He says what he thinks, but he won't take advice or admit he's wrong. (casual, shows the two can differ)

The last sentence is the one to remember. Someone can tell the truth bluntly and still refuse to listen to anyone, which makes them 正直しょうじき but not 素直すなお. In anime, a 素直すなおじゃない character is the tsundere type who cannot say what they feel openly.

What does 誠実せいじつ add?

誠実せいじつ (せいじつ) means sincere, faithful and trustworthy: honest in conduct over time. Where 正直しょうじき is about speaking straight, 誠実せいじつ is about how you treat people and keep your word. It is a more formal word and is often used in business, apologies, and descriptions of someone's attitude.

誠実せいじつな対応たいおうに感謝かんしゃします。 — I appreciate your sincere handling of this. (formal, business language) 彼かれはとても誠実せいじつな人ひとです。 — He is a very sincere person. (polite, trusted, reliable)

If you are curious about the trust side, our post on believing in Japanese with 信しんじる and the one on promises with 約束やくそく pair naturally with 誠実せいじつ.

Common mistakes

  • Translating "honest" as 素直すなお every time. 素直すなお is about being open and docile. For "does not lie", use 正直しょうじき.
  • Using ぶっちゃけ at work or with a teacher. It is slang, so keep it for friends. 正直しょうじきに言いうと is the safe version.
  • Stopping at 正直しょうじき言いう. The usual openers are 正直しょうじきに言いうと, 正直しょうじき言いうと and 正直しょうじき言いって; all three are natural. 正直しょうじきに言いうと is slightly more careful in writing, and 正直しょうじき、… is the short spoken form.
  • Saying 嘘うそつき to an adult in a polite situation. It is a strong accusation. 嘘うそでしょう? is gentler.
  • Treating 正直しょうじきな人ひと as always a compliment. Sometimes it means "too frank", and context decides.

Quick comparison

Word Core meaning Register Example
正直しょうじき honest, frank neutral, any level 正直しょうじきに言いうと
ぶっちゃけ frankly, to be real very casual, slang ぶっちゃけ、無理むり
本当ほんとうのことを言いう tell the truth neutral 本当ほんとうのことを言いってください
素直すなお open, receptive, willing to listen neutral, positive 素直すなおに謝あやまる
誠実せいじつ sincere, trustworthy formal, business 誠実せいじつな人ひと
嘘うそつき liar strong, casual 嘘うそつき!

Practice

Try each answer yourself before opening it. Questions 5 and 6 are a pair on the key contrast: 正直しょうじき versus 素直すなお.

1. Say "He is an honest person."

Show answer

彼かれは正直しょうじきな人ひとです — 正直しょうじき is a な-adjective, so it takes な before a noun.

2. How do you open a sentence with "to be honest" in polite Japanese?

Show answer

正直しょうじきに言いうと、… — it warns the listener that a frank opinion follows. The short form 正直しょうじき、… also works.

3. Which is casual slang for "frankly": 正直しょうじき, ぶっちゃけ, or 誠実せいじつ?

Show answer

ぶっちゃけ — it is slangy and for friends. 正直しょうじき is neutral and 誠実せいじつ is formal and about being sincere.

4. How do you say "Please tell me the truth"?

Show answer

本当ほんとうのことを言いってください — 本当ほんとうのこと means "the real thing", so it points at facts.

5. A person tells the truth bluntly but never listens to advice. Is that 正直しょうじき or 素直すなお?

Show answer

正直しょうじき (but not 素直すなお) — 正直しょうじき is about not lying. 素直すなお is about being open and willing to listen, which this person is not.

6. A child follows advice, admits a mistake, and apologizes without excuses. Which word fits best?

Show answer

素直すなお — 素直すなおに謝あやまる means to apologize openly, without resistance. This is the pair to question 5.

7. In an anime, a detective shouts "Tell the truth!" What does he say?

Show answer

正直しょうじきに言いえ! — the rough imperative of 言いう. It is a command, so it would sound very harsh in real polite speech.

8. What is the Japanese word for "liar", and what is the verb for "to lie"?

Show answer

嘘うそつき and 嘘うそをつく — 嘘うそ is "a lie", and つく is the verb used with it. 嘘うそつき is a harsh word, so be careful.

9. Which opener is the slightly more careful written form: 正直しょうじき言いうと or 正直しょうじきに言いうと?

Show answer

正直しょうじきに言いうと — both are natural in speech, but に makes it a little more formal in writing.

10. Which word means "sincere and trustworthy in how you treat people", often in business?

Show answer

誠実せいじつ — it is about faithful conduct over time, not only about speaking straight.

Use a trial lesson to give an honest opinion with 正直しょうじき and ぶっちゃけ, then describe a friend who is 素直すなお, and hear how 正直しょうじき and 素直すなお differ.

FAQ

Is 正直しょうじき polite enough for a job interview? Yes. 正直しょうじきに申し上もうしあげますと is the formal version of 正直しょうじきに言いうと. Just avoid the slang ぶっちゃけ there.

What is the difference between 正直しょうじき and 本当ほんとう? 本当ほんとう means "true" or "really", about facts. 正直しょうじき describes a person who speaks without hiding things, or marks a frank statement at the start of a sentence.

Can I say 正直しょうじき on its own as a sentence? Not as a full sentence. 正直しょうじき、… needs the opinion that follows.

Is 素直すなお a good thing to be called? Usually yes. It praises someone who listens, learns, and says sorry easily. It can occasionally sound like "naive", so tone matters.

What does 正直者しょうじきもの mean? It means "an honest person", with a slightly storybook feel. 正直者しょうじきものが馬鹿ばかを見みる is a well-known saying that honest people end up losing out.

Why do anime characters say ぶっちゃけ so often? Because it shows a casual, frank personality in one word, and anime dialogue favors short, punchy lines.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

正直	しょうじき — honest, frank
正直者	しょうじきもの — an honest person
ぶっちゃけ	ぶっちゃけ — frankly (casual slang)
本当のこと	ほんとうのこと — the truth, the real thing
素直	すなお — straightforward, receptive, docile
誠実	せいじつ — sincere, trustworthy
嘘	うそ — a lie
嘘つき	うそつき — liar
嘘をつく	うそをつく — to tell a lie
本音	ほんね — true feelings
謝る	あやまる — to apologize
言う	いう — to say

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime, so most of the example sentences on this blog come from lines I've actually heard students ask about — including this one, which comes up in nearly every beginner's first few lessons. For practice with feedback, Book a trial lesson · $13, or work through Japanese practice exercises first.

Sources: the author's own lessons and standard reference grammars.

More drills like the ones above, plus a timed JLPT-style mock test: Practice · N4 · Read something at this level: JLPT N4 stories with audio

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