How to Say “I Promise” in Japanese: Formal and Informal Ways

Learning how to express your promises in different languages can help you build stronger connections with people from diverse cultures. In Japanese, conveying a promise is simple yet significant. In this guide, we will explore both formal and informal ways to say “I promise” in Japanese, providing you with various tips and examples to ensure you use the appropriate phrase in any situation.

1. Formal Ways to Say “I Promise” in Japanese

When it comes to formal situations, such as professional settings or interactions with esteemed individuals, it’s essential to use polite language. Fortunately, Japanese offers several polite phrases to express your promises respectfully.

a) 約束します (Yakusoku shimasu)

One of the most common ways to say “I promise” formally in Japanese is by using the phrase “約束します” (Yakusoku shimasu), which directly translates to “I promise.” This phrase is appropriate in formal settings and signifies a sincere commitment.

Example 1: Meeting your potential employer.

Interviewer: お仕事のデッドラインは守れますか? (Oshigoto no dedorain wa mamoremasu ka?)

Candidate: はい、約束します。 (Hai, yakusoku shimasu.)

Translation: Yes, I promise.

b) 必ずやります (Kanarazu yarimasu)

Another formal way to convey a promise in Japanese is by using the phrase “必ずやります” (Kanarazu yarimasu), meaning “I will definitely do it.” This expression adds an extra layer of emphasis to your commitment, assuring the recipient of your unwavering dedication.

Example 2: Making a promise to a client.

Client: 来週までにプレゼンテーションを完成させてください。 (Raishū made ni purezentēshon o kansei sasete kudasai.)

Professional: はい、必ずやります。 (Hai, kanarazu yarimasu.)

Translation: Yes, I will definitely do it.

2. Informal Ways to Say “I Promise” in Japanese

When interacting with close friends, family members, or peers in casual settings, you can opt for less formal phrases to express your promises. Informal language enhances the sense of friendship and familiarity in your conversations.

a) 約束するよ (Yakusoku suru yo)

If you want to say “I promise” in an informal yet still reliable manner, you can use the phrase “約束するよ” (Yakusoku suru yo). This expression is suitable for conversations with friends and siblings, allowing you to maintain a warm and amiable tone.

Example 3: Making a promise to a friend.

Friend: 明日一緒に映画を見に行かない? (Ashita issho ni eiga o mi ni ikanai?)

You: うん、約束するよ。 (Un, yakusoku suru yo.)

Translation: Yeah, I promise.

b) 絶対にやる (Zettai ni yaru)

When you want to convey an informal promise with an emphasis on certainty, you can use the phrase “絶対にやる” (Zettai ni yaru), meaning “I will absolutely do it.” This expression comes across as passionate and determined.

Example 4: Making a promise to a sibling.

Sibling: 明日の朝ごはん、作ってくれる? (Asu no asa gohan, tsukutte kureru?)

You: 絶対にやるから安心して。 (Zettai ni yaru kara anshin shite.)

Translation: I will absolutely do it, so don’t worry.

Wrap-up

Learning how to say “I promise” in Japanese, both formally and informally, enables you to express your commitment in various social scenarios. Remember to adjust your language based on the level of formality required in a specific situation. By incorporating these common phrases into your Japanese vocabulary, you can deepen your connections and exhibit cultural respect. So, start practicing these expressions and enjoy bonding with Japanese speakers through the power of promises!

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