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行為

こうい

koui

act
Noun

The word "kōi" refers to a conscious act or deed, typically viewed from an objective, legal, or ethical perspective. It is significantly more formal and abstract than "kōdō" (行動), which describes general behavior or the physical act of moving/acting. While "kōdō" is used for everyday actions (e.g., "taking action to solve a problem"), "kōi" is used when the action is being judged as right or wrong, legal or illegal.

In legal contexts, it specifically refers to an "act" that can be subject to liability or a crime. In philosophical or religious contexts, it refers to a "deed" that reflects one's will or morality.

Avoid using "kōi" for simple, routine physical movements. For example, calling the act of brushing your teeth a "kōi" would sound unnaturally clinical or overly dramatic, as if the act of brushing teeth were being analyzed in a court of law or a moral treatise.

Meanings

Nounact

A conscious action or deed, often discussed in legal, ethical, or philosophical contexts.

Examples

彼の行為組織の利益に反していると指摘された。

It was pointed out that his actions were contrary to the interests of the organization.

Business

そんな行為を正当化できる理由があるのか。

Is there any reason that can justify such an act?

先生生徒の不適切な行為を厳しく注意した。

The teacher strictly warned the student about their inappropriate behavior.

School Life

自分の行為が他人にどう見えるかを考えなさい。

Always think about how your actions appear to others.

意識的な行為でないと責任ことはできない。

One cannot be held responsible if it was not a conscious act.

Detective

この行為を繰り返せば取り返しのつかないことになる。

If you repeat this act, it will lead to something irreversible.

Last Updated: May 2026Report an Error