Ways to say it
| Japanese | Romanization (Wiktionary) | Note |
|---|---|---|
| もし… | moshi… | |
| …なら | …nara | |
| …ならば | …naraba | |
| …だったら | …dattara | |
| …と | particle | |
| …ては | …te wa | suffix |
| …えば | …eba | suffix |
Japanese uses different forms to express 'if' depending on whether the situation is a hypothetical scenario, a natural consequence or a specific context. The adverb もし… is a common and versatile way to say 'if' in both written and spoken language. An alternative form, もしも, can also be used to suggest a hypothetical situation. For unlikely or unexpected situations, the term 万一 is used to convey a sense of 'in case'.
Which one should you use?
The forms you choose change the meaning of the 'if' clause. The particle …と is used for natural, inevitable or habitual consequences, such as 'if you press this button, the light turns on', rather than hypothetical scenarios. The form …なら is used when the 'if' clause provides context or a topic for a following suggestion or judgment, such as 'if it's a matter of time, then…'. For hypothetical situations in spoken Japanese, it is very common to combine the adverb もし with the suffix …たら to clearly emphasize the 'if'.
Is there a formal and an informal way to say it?
While …なら is a standard way to provide context, its version …ならば is a more formal and literary form. The suffix …だったら is a casual and commonly used colloquial form.
Related words
How does it change in a sentence?
The particle …なら functions as a way to set a topic for the subsequent judgment or suggestion. The suffix …ては and the suffix …えば are also available forms for expressing conditions.
How do you pronounce it?
moshi…
Did you know?
- The term 万一 (man'ichi), which translates to 'if' or 'in case', literally means 'ten thousand one', implying a one-in-ten-thousand chance.
- In Japanese, using the …と conditional to describe a future human action can sound like a threat or a warning, as it implies the result is an inevitable law of nature.
- The formal form …ならば is so strongly associated with classical Japanese that using it in casual conversation can make a speaker sound like they are reciting a legal document or an ancient text.
Examples in context
- もし雨が降ったら、傘を持って行きます。If it rains, I will bring an umbrella.
- もしも私が日本に行けたら、富士山に登りたいです。If I could go to Japan, I would like to climb Mount Fuji.
- 万一試験に落ちたら、再試験を受けることができます。In case I fail the exam, I can take a makeup test.
- 時間があれば、映画を見ますIf I have time, I will watch a movie.
- もし天気がいいならif the weather is good
Sources
- Wiktionary, “if” translations, CC BY-SA 4.0, dump of 2026-09-26.
