Translation guide
A romantic relationship, often secret or extramarital, or a strong enthusiasm for something.
Referring to a romantic and usually sexual relationship between two people who are not married to each other, often kept secret.
He is having an affair.
The affair was exposed.
Refers to cheating or a fling, often less serious than 不倫. Can be used for both married and unmarried couples. Implies a breach of fidelity.
I can't forgive my boyfriend's cheating.
A neutral term for a romantic relationship. It doesn't inherently imply secrecy or extramarital status, but can be used in context.
They had a long love affair.
A literary or formal term for a love affair, often emphasizing the physical aspect. Used in novels and serious discussions.
He was enjoying a secret love affair.
Describing a great liking or enthusiasm for an activity, object, or subject.
Means 'passion for ~'. A natural way to express a love affair with something in a figurative sense.
His love affair with cooking is amazing.
Means 'crazy about ~' or 'absorbed in ~'. Conveys a strong, often temporary, infatuation.
Literally 'big favorite'. Used to describe something one is very fond of, like a 'love affair' with a particular item or brand.
The literal translation '愛の事件' (ai no jiken) is not used in Japanese. Use the terms above depending on context.
不倫 (furin) specifically refers to an extramarital affair and carries a strong sense of social taboo. 浮気 (uwaki) is broader, meaning cheating or a fling, and can apply to any committed relationship. 浮気 can also be used for non-romantic infidelity, like being unfaithful to a brand.
She's having a love affair with her new hobby.
She has a love affair with this brand.