Guide: How to Say “I Will” in Japanese

Learning how to express “I will” in Japanese is an essential part of mastering the language. Whether you want to make promises, state your intentions, or simply talk about future actions, understanding how to use the correct phrase is crucial. In this guide, we will explore various ways to say “I will” in both formal and informal settings, with a focus on standard Japanese while highlighting any regional variations. Get ready to enhance your Japanese speaking skills and confidently express your future plans!

1. Informal Ways to Say “I Will”

Informal speech is commonly used among friends, family, and in casual settings. To express “I will” in an informal context, you can use the following phrases:

  • 1. するつもりだ (suru tsumori da)

This phrase literally translates to “I intend to do.” It is a straightforward and commonly used way to express your intentions in an informal manner. For example:

明日、映画を見に行くつもりだ。
(Ashita, eiga o mi ni iku tsumori da)
“I intend to go watch a movie tomorrow.”

  • 2. -うと思っている (-u to omotteiru)

This phrase indicates “I think I will [verb].” It is used when you are still considering your future actions in an informal context. Here’s an example:

今晩、友達と食べに行こうと思っている。
(Konban, tomodachi to tabe ni iko~u to omotteiru)
“I think I will go out to eat with my friends tonight.”

2. Formal Ways to Say “I Will”

Formal speech is necessary when speaking with individuals in positions of authority, strangers, or during business situations. The following phrases can be used to express “I will” formally:

  • 1. いたします (itashimasu)

This polite phrase is commonly used to show respect and express your intent to perform an action for someone else. For instance:

明日、レポートを提出いたします。
(Ashita, repooto o teishutsu itashimasu)
“I will submit the report tomorrow.”

  • 2. -ましょう (-mashou)

The auxiliary verb -ましょう is used to propose or suggest an action politely. This form is often used in suggestions, invitations, or when making plans with someone you respect. Here’s an example:

今週末、野球をしましょう。
(Konshuumatsu, yakyuu o shimashou)
“Let’s play baseball this weekend.”

3. Additional Tips and Examples

Here are a few additional tips and examples to help you further understand how to say “I will” in Japanese:

• Note the Context:

Consider the context in which you are speaking before choosing the appropriate phrase. Formality is crucial in Japanese culture, so ensure that your speech aligns with the situation, whether it is formal or informal.

• Time Expressions:

When expressing future actions, it is common to include time expressions to provide clarity. For instance, “tomorrow,” “next week,” or “tonight.”

• Adding Emphasis:

If you wish to add emphasis to your intention, you can use the adverb “definitely” or “certainly” in Japanese. For example, “必ず (kanarazu)” or “絶対に (zettai ni)” can be added for emphasis when expressing “I will.”

• Verb Conjugation:

Remember that the verb conjugation depends on the tense, formality, and politeness level. Practice conjugating verbs according to the desired sentence structure.


Mastering the different ways to say “I will” in Japanese is a fundamental skill. Practice using these phrases in various settings to become more comfortable with expressing your intentions. Remember to consider the context, utilize appropriate time expressions, and choose the correct level of formality based on the situation. With dedication and practice, you will soon navigate the Japanese language with ease, impressing others with your linguistic abilities. Good luck!

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