Translation guide
How to express that something is done or happens without a reason, cause, or justification in Japanese.
Expressing that an action or feeling occurs spontaneously, without a specific cause or motive.
A very common, natural way to say 'without any particular reason' or 'just because'. It conveys a vague, intuitive feeling or action.
I went outside without any particular reason.
I feel sad for no reason.
Literally 'without even a reason'. More direct than なんとなく, and can sound slightly more emphatic or negative.
He got angry without any reason.
Similar to 理由もなく, meaning 'without reason/cause'. Often used in more emotional or literary contexts.
Tears came to my eyes for no reason.
Indicating that an action, accusation, or belief lacks a valid basis or is unreasonable.
A straightforward way to say 'without reason', often used in formal or written contexts when stating that something is groundless.
Absence without reason is not permitted.
Means 'without justifiable reason'. Used in legal, official, or formal contexts.
I was dismissed without just cause.
Literally 'without basis/grounds'. Used when criticizing unfounded claims or accusations.
You shouldn't suspect people without grounds.
Describing a person, action, or situation that is not based on reason or logic.
Emphasizing that something happens completely without cause, often with a nuance of surprise or frustration.
なんとなく is the most natural for everyday 'without reason' when describing vague feelings or casual actions. 理由もなく is more direct and can imply that a reason should exist but doesn't, sometimes carrying a negative tone.
I came here just because.
He avoids me for no reason.
Direct translations like '理由なしで' are not natural. Use the phrases provided. Also, note that 'without reason' in English can sometimes be expressed by a simple 'just because' in Japanese, which is captured by なんとなく.
I was scolded without reason.
その決定は不合理だ。
That decision is irrational.