Translation guide
A guide to expressing 'anal intercourse' in Japanese, covering clinical terms, common slang, and euphemisms, with notes on politeness and context.
To refer to anal intercourse in a formal, medical, or academic context.
To refer to anal intercourse in casual, informal, or vulgar conversation.
Short for アナルセックス, used colloquially. Can be considered crude depending on context.
To refer to anal intercourse indirectly or euphemistically, often in sexual contexts.
Literally 'use the back', a common euphemism for anal intercourse. Used in adult content and casual talk.
今日は後ろを使ってみない？
How about we try the back today?
Terms like ケツ are extremely vulgar and should be avoided in all but the most informal, private settings. In medical or educational contexts, stick to 肛門性交 or アナルセックス. Euphemisms like 後ろを使う are common in adult media but may sound crude in everyday conversation.
アナルセックス is the loanword and more common in everyday speech, while 肛門性交 is the native clinical term. Both are acceptable in formal writing, but 肛門性交 is preferred in academic papers.
The standard clinical term for anal intercourse. Used in medical documents, sex education, and formal discussions.
肛門性交は性感染症のリスクを高めることがあります。
Anal intercourse can increase the risk of sexually transmitted infections.
Loanword from English, widely understood but less formal than 肛門性交. Common in educational materials and everyday conversation.
アナルセックスについて正しい知識を持つことが大切です。
It's important to have accurate knowledge about anal sex.
彼氏とアナルを試してみた。
I tried anal with my boyfriend.
Vulgar slang for buttocks; can imply anal intercourse in context. Very crude and often offensive.
Extremely vulgar; avoid in polite company.
ケツでやる？
Wanna do it in the butt?
Literally 'do it from behind', can imply anal intercourse depending on context. Ambiguous; often refers to rear-entry vaginal sex.
Context-dependent; may not always mean anal. Clarify if needed.
バックでするのが好きなんだ。
I like doing it from behind.