〜こと koto
〜こと（koto）means “(nominalizer) the act/fact of; that ...”. Attaches to a verb (or noun via の) to turn a clause into a noun phrase, so it can act as a subject or object. Formation: V-る / V-ない + こと ／ N + の + こと
(nominalizer) the act/fact of; that ...
N3Formation
V-る / V-ない + こと ／ N + の + こと
Explanation
Attaches to a verb (or noun via の) to turn a clause into a noun phrase, so it can act as a subject or object. It refers to an action, situation, or fact in the abstract.
Examples
Note
Both こと and の nominalize, but こと is preferred for abstract facts and set expressions, while の is used for events perceived directly (e.g. with 見る, 聞こえる).
FAQ
〜こと — what does it mean and how is it used?
(nominalizer) the act/fact of; that .... Attaches to a verb (or noun via の) to turn a clause into a noun phrase, so it can act as a subject or object. It refers to an action, situation, or fact in the abstract.
〜こと — how do you form it?
V-る / V-ない + こと ／ N + の + こと
〜こと — any usage notes?
Both こと and の nominalize, but こと is preferred for abstract facts and set expressions, while の is used for events perceived directly (e.g. with 見る, 聞こえる).