Translation guide
The English word "breast" can refer to the anatomical chest area, the female mammary glands, or the front part of a bird. In Japanese, different words are used depending on the context, and some terms carry specific nuances of formality, politeness, or clinical tone.
Referring to the female breast, especially in everyday or polite conversation.
General word for chest or breast. In context, it can refer to the female breast, but it is ambiguous and can also mean the chest area in general. Polite and commonly used.
彼女は胸に手を当てた。
She put her hand on her breast.
Colloquial and somewhat childish word for breasts. Often used by children or in casual, intimate settings. Can be considered vulgar in formal contexts.
赤ちゃんがおっぱいを飲んでいる。
The baby is drinking milk from the breast.
Anatomical term for the female breast. Used in medical or formal contexts. Can sound clinical.
乳房のしこりに気づいたら、医者に相談してください。
If you notice a lump in your breast, please consult a doctor.
Loanword from English, used mainly in fashion, beauty, or when discussing breast size. Not used in everyday conversation about the body.
バストサイズを測る。
Measure one's bust size.
Referring to the front part of the human torso, not specifically female breasts.
Referring to the breast meat of poultry or the front part of a bird's body.
Specifically refers to breast meat of chicken or other birds. Commonly used in cooking.
鶏の胸肉は低脂肪でヘルシーです。
Chicken breast is low in fat and healthy.
Can refer to the breast of a bird in a general sense, but often clarified with context (e.g., 鶏の胸).
Using 'breast' to mean the seat of emotions, heart, or inner feelings.
Used metaphorically to refer to the heart or emotions, similar to English. Common in expressions like 胸が一杯になる (to be full of emotion).
その話を聞いて胸が熱くなった。
My breast swelled with emotion upon hearing that story.
Literary term meaning 'in one's heart' or 'bosom'. Used in formal writing.
When referring to a woman's breasts in polite conversation, using おっぱい can be too casual or even vulgar. Stick to 胸 unless you are in a very informal setting. In medical contexts, 乳房 is appropriate.
胸 (むね) is the safest and most versatile word for chest or breast. 乳房 (ちぶさ) is clinical and specific to the female mammary gland. おっぱい is childish or slangy and should be used with caution.
Take a chest X-ray.
That bird has a red breast.
胸中を察する。
Understand what is in someone's breast (heart).