22 Japanese ways to say “Can I trust you?”

Trust is a universal theme, and knowing how to ask “Can I trust you?” in Japanese opens doors to deeper connections.

Whether you’re building friendships or business relationships, expressing this question naturally is key.

Japanese offers many ways to say this, from casual to formal, each carrying a unique nuance.

This listicle is filled with warm, relatable phrases you can use in different situations, making your language skills feel more authentic.

Plus, understanding these variations helps you grasp cultural subtleties around trust and communication.

Ready to explore 22 ways to ask “Can I trust you?” in Japanese? Let’s dive in!

Understanding Trust in Japanese Language

Trust is expressed in various ways depending on the context and relationship.

In Japanese, the word for trust is 信頼 (しんらい, shinrai), but people often use more conversational or indirect expressions to ask if someone can be trusted.

These phrases range from polite to casual, so knowing when to use each will help you sound natural and respectful.

Sometimes, starting with a solid language guide on trust-related phrases can help you get comfortable with nuances.

With practice, you’ll find it easier to express and understand trust in everyday conversations.

Let’s explore the first part focusing on casual ways to ask “Can I trust you?”

Part 1: Casual Suggestions

1. 信じていい？ (Shinjite ii?) – “Can I trust you?”

This phrase is a straightforward and casual way to ask if you can trust someone.

信じて (しんじて, shinjite) is the te-form of 信じる (しんじる, shinjiru), meaning “to believe” or “trust.” いい (ii) means “good” or “okay.” Together, it’s like asking “Is it okay to trust you?”

Perfect for close friends or informal situations where you want to confirm trust gently.

It’s simple, direct, and to the point.

You might also hear 信じて大丈夫？ (shinjite daijoubu?), which adds the nuance of “Is it safe to trust you?”

Use this phrase when you want to keep things light but meaningful.

2. 本当に大丈夫？ (Hontou ni daijoubu?) – “Is it really okay?”

This phrase indirectly checks if you can trust someone by asking if things are truly alright.

本当に (ほんとうに, hontou ni) means “really” or “truly,” and 大丈夫 (だいじょうぶ, daijoubu) means “okay” or “safe.”

It’s a casual way to seek reassurance without sounding too formal.

Great for friends or colleagues when you want to confirm reliability.

Just be careful not to sound accusatory; your tone should stay curious and warm.

It’s a versatile phrase that fits many everyday contexts.

3. ちゃんとできる？ (Chanto dekiru?) – “Can you do it properly?”

This phrase questions if someone can handle a task reliably, implying trustworthiness.

ちゃんと (chanto) means “properly” or “correctly,” and できる (できる, dekiru) means “can do.” When combined, it asks if the person can do something well or as promised.

It’s casual and often used in work or group settings.

It’s less direct about trust but gets at the same core idea.

Use it when you want to trust someone with responsibility.

Also, you can say ちゃんとやれる？ (chanto yareru?), a similar, slightly more informal version.

4. 任せて大丈夫？ (Makete daijoubu?) – “Can I leave it to you?”

This phrase literally asks if it’s okay to entrust someone with something.

任せて (まかせて, makasete) is the te-form of 任せる (まかせる, makaseru), which means “to entrust” or “to leave to someone.”

大丈夫 (だいじょうぶ, daijoubu) adds the question of safety or confidence.

It’s casual but respectful, great for colleagues or friends.

It’s an active way to confirm trust before handing over responsibility.

Try this when you want to confirm if someone can handle a task or duty.

5. 信用できる？ (Shinyou dekiru?) – “Can I trust you?”

This is a direct way to ask about trust but slightly more formal than 信じていい？

信用 (しんよう, shinyou) means “trust” or “confidence,” and できる (できる, dekiru) means “can do.”

It’s often used in business or serious conversations.

While casual enough, it shows you’re serious about trust.

Be mindful of tone; it shouldn’t sound suspicious but sincere.

Useful for when you want to clarify trust in important contexts.

6. 嘘つかない？ (Uso tsukanai?) – “You won’t lie, right?”

This phrase is casual and a bit playful but checks honesty as a form of trust.

嘘 (うそ, uso) means “lie,” and つかない (tsukanai) is the negative form of つく (tsuku), “to tell.”

It’s like asking “You won’t lie, right?” in an informal way.

Use it with close friends or family, keeping tone light.

It’s great for confirming truthful behavior without sounding too heavy.

Watch your tone so it doesn’t sound accusatory.

7. 大丈夫かな？ (Daijoubu kana?) – “Is it okay, I wonder?”

This phrase is indirect and casual, often used when you’re unsure if you should trust someone.

大丈夫 (だいじょうぶ, daijoubu) means “okay” or “all right,” and かな (kana) adds uncertainty or wonder.

It’s like saying “I wonder if it’s okay.”

Perfect for softening the question in casual chats.

It implies trust but also caution.

Use it when you want to gently check on someone’s reliability.

8. 本気？ (Honki?) – “Are you serious?” / “Can I trust you?”

本気 (ほんき, honki) means “seriousness” or “earnestness.”

This short phrase is a casual, punchy way to ask if someone’s sincere enough to trust.

It’s often used among close friends or peers to check sincerity.

It can be playful or serious depending on tone.

Great for situations where trust depends on someone’s genuine intent.

Be mindful to sound interested rather than skeptical.

Part 2: Polite & Formal Suggestions

9. 信頼してもよろしいですか？ (Shinrai shite mo yoroshii desu ka?) – “May I trust you?”

This formal phrase is perfect for business or new acquaintances.

信頼 (しんらい, shinrai) means “trust,” してもよろしいですか (shite mo yoroshii desu ka) politely asks “may I do…” or “is it alright to…”

It’s respectful and clear, fitting professional situations.

It shows you value the other person’s response and want to confirm trust carefully.

Use this phrase when clarity and politeness are a must.

It’s a great phrase to add to your formal Japanese toolkit.

10. お約束いただけますか？ (Oyakusoku itadakemasu ka?) – “Can you promise me?”

This phrase is a polite way to ask for a promise, implying trustworthiness.

お約束 (おやくそく, oyakusoku) means “promise,” and いただけますか (itadakemasu ka) is a respectful request form.

It’s useful when you want formal assurance of trust.

Common in business or important personal matters.

It can build a respectful but clear foundation for trust.

Practice this phrase to sound polished and professional.

11. 信じてよろしいでしょうか？ (Shinjite yoroshii deshou ka?) – “Is it alright to trust you?”

This is a polite and slightly formal way to inquire about trust.

Similar to 信じていい？ but much more respectful.

よろしいでしょうか (yoroshii deshou ka) is a polite, gentle way to say “Is it okay?”

Perfect for situations where you want to be careful and respectful.

It fits well in both business and personal contexts.

It shows consideration and politeness, helping maintain harmony.

12. ご安心いただけますか？ (Goanshin itadakemasu ka?) – “Can you be assured?”

This phrase is often used to assure someone, implying they can trust the situation or person.

ご安心 (ごあんしん, goanshin) means “peace of mind” or “assurance,” and いただけますか (itadakemasu ka) is a polite request.

Common in customer service or formal assurances.

It’s a way to build trust by offering comfort.

Use it when you want to reassure someone politely.

It’s a very respectful and warm phrase.

13. お任せしてもよろしいでしょうか？ (Omakase shite mo yoroshii deshou ka?) – “May I leave it to you?”

A formal and polite way to ask if you can entrust someone with a task.

お任せ (おまかせ, omakase) means “leaving it to someone,” and the rest is a polite request form.

Great for professional settings or formal occasions.

It clearly communicates trust and respect.

Make sure to use this when you want to sound courteous and serious.

It helps maintain professionalism in communication.

14. 信用して間違いありませんか？ (Shinyou shite machigai arimasen ka?) – “Is there no mistake in trusting you?”

This phrase is very formal and seeks confirmation that trusting someone is the right choice.

信用して (しんようして, shinyou shite) means “to trust,” 間違いありませんか (まちがいありませんか, machigai arimasen ka) means “is there no mistake?”

It’s best reserved for important contracts or serious commitments.

It conveys deep concern about trustworthiness.

Use it thoughtfully to avoid sounding overly suspicious.

It’s a good phrase for serious verification.

15. ご信頼いただけますか？ (Goshinrai itadakemasu ka?) – “May I receive your trust?”

A very polite and humble way to ask for someone’s trust.

ご信頼 (ごしんらい, goshinrai) is an honorific version of “trust,” and いただけますか is a respectful request.

Great for formal introductions or when building a new relationship.

Shows humility and respect for the other person’s decision.

Use it when you want to be very polite and professional.

It’s ideal in business or formal social settings.

16. お約束を守っていただけますか？ (Oyakusoku o mamotte itadakemasu ka?) – “Can you keep your promise?”

This is a polite way to confirm that the person will be trustworthy by keeping their promises.

お約束 (おやくそく, oyakusoku) means “promise,” 守って (まもって, mamotte) means “to keep,” and いただけますか is a polite request form.

Use this phrase to ensure reliability in formal situations.

It balances firmness with courtesy.

It’s excellent when you want to confirm commitment.

Practice it to sound both respectful and serious.

Part 3: Very Casual / Native-like Expressions

17. 信じてる？ (Shinjiteru?) – “Do you trust me?” / “Can I trust you?”

This is a relaxed, everyday phrase that’s popular among young people.

信じてる (しんじてる, shinjiteru) is the casual, contracted form of 信じている (shinjite iru), meaning “believing” or “trusting.”

It’s a natural way to check trust without formality.

Often used between close friends or couples.

It’s direct but warm and familiar.

Use it when you want to sound like a native speaker in casual chats.

18. 大丈夫？信用できる？ (Daijoubu? Shinyou dekiru?) – “Is it okay? Can I trust you?”

This combo phrase blends a casual “Are you okay?” with a direct trust question.

It’s common in friendly, informal contexts.

大丈夫？ (daijoubu?) checks if things are okay, 信用できる？ (shinyou dekiru?) asks “can I trust you?”

It’s easy to say and understand.

Perfect for quick, natural conversations.

Use it when you want to check both mood and trust at once.

19. 嘘じゃないよね？ (Uso janai yo ne?) – “You’re not lying, right?”

A very casual and slightly playful way to seek honesty and trust.

嘘じゃない (uso janai) means “not a lie,” and よね (yo ne) adds a tag question feeling.

Common among friends or couples.

It’s informal and softens the question of trust.

Use it to keep things light but meaningful.

Great for everyday conversations.

20. マジで？信じていいの？ (Maji de? Shinjite ii no?) – “Seriously? Can I trust you?”

マジで (maji de) means “seriously” or “really,” adding emphasis.

Combined with 信じていいの？ (shinjite ii no?), it’s a casual, expressive phrase.

Often used when you’re surprised or unsure but hopeful.

It’s lively and conversational.

Perfect for close friends or casual chats.

Use it to sound natural and expressive.

21. 任せたよ！ (Makaseta yo!) – “I’m counting on you!”

Though it’s a statement rather than a question, it implies trust strongly.

任せた (まかせた, makaseta) means “I entrusted (it to you),” and よ (yo) adds emphasis.

It’s casual, confident, and encouraging.

Used when you trust someone to handle something.

Great for friends or teammates.

It’s a positive way to express trust without asking.

22. ちゃんとやってくれる？ (Chanto yatte kureru?) – “Will you do it properly?”

A very casual way to confirm if someone will follow through reliably.

ちゃんと (chanto) means “properly,” やってくれる (yatte kureru) means “will you do (it) for me?”

It’s common among friends and coworkers.

Sounds natural and native-like.

Good for informal but serious trust checks.

Use it when you want to confirm responsibility casually.

Concluding Thought

Exploring these 22 phrases reveals just how rich and nuanced asking “Can I trust you?” can be in Japanese.

From casual chats to formal business talks, there’s a way to express trust that fits every relationship and situation.

With these expressions in your language toolkit, you’re better prepared to build genuine connections with warmth and confidence.