Translation guide
The English word "mistress" has several distinct meanings. This guide covers the most common ones for learners: a woman in a position of authority, a woman having an affair with a married man, a female owner of a pet, and a female teacher (especially in private tutoring or traditional arts). It also notes the archaic use as a title.
Referring to a woman who is in charge, such as a female head of a household, a female employer, or a woman who dominates a situation.
Literally 'female master/head of household'. Used for a woman who is the head of a household or an establishment. Can also refer to a female employer in a domestic setting.
彼女はこの家の女主人です。
She is the mistress of this house.
A gender-neutral term for 'master' or 'head of a household'. Can be used for a mistress when the context makes the gender clear, but it is not specifically feminine.
この館の主は女性だ。
The mistress of this mansion is a woman.
Means 'ruler' or 'controller'. Can be used for a woman who dominates a field or situation, but it is a strong word implying power over others.
彼女はファッション界の支配者だ。
She is the mistress of the fashion world.
Referring to a woman who is in a sexual relationship with a married man, often kept secretly.
The most common and direct term for a mistress in the sense of an extramarital lover. Can be used for both men and women, but context usually clarifies.
彼には長年の愛人がいる。
He has a mistress of many years.
Specifically a female lover in an extramarital affair. More formal and somewhat literary compared to 愛人.
A colloquial and somewhat dated term for a mistress, literally 'number two'. It implies a kept woman, often in a long-term arrangement.
彼は二号さんに家を買ってあげたらしい。
I heard he bought a house for his mistress.
Referring to a woman who owns a pet, especially a dog or cat.
The standard term for a pet owner is 飼い主, which is gender-neutral. To specify a female owner, you can add 女性 or use context. There is no single common word for 'mistress' in this sense.
迷子の犬は飼い主の女性に戻された。
The lost dog was returned to its mistress.
In most cases, simply using 飼い主 is sufficient. If the gender is important, you can rephrase the sentence to make it clear, e.g., 'the woman who owns the dog'.
その犬を飼っている女性は親切だ。
The mistress of that dog is kind.
Referring to a woman who teaches, especially in a private setting, traditional arts, or as a governess.
Literally 'female teacher'. Used for a woman who teaches in a school or private lessons. It is a neutral term.
彼女はピアノの女教師です。
She is a piano mistress.
A respectful title for a teacher, instructor, or master of an art. It is gender-neutral but commonly used for female teachers as well. Often used for private tutors or traditional arts instructors.
茶道の先生は女性です。
The tea ceremony mistress is a woman.
Specifically a female master or instructor in traditional arts. 師匠 implies a high level of mastery and is used for teachers of arts like dance, flower arrangement, etc.
彼女は日本舞踊の女師匠です。
She is a mistress of Japanese dance.
The historical use of 'Mistress' as a title for women, equivalent to Mrs. or Miss.
There is no direct equivalent of the archaic 'Mistress' in modern Japanese. Use さん for general politeness, 様 for formal address, or 夫人 for 'Mrs.' when referring to a married woman.
スミス夫人
Mistress Smith (archaic) → Mrs. Smith
While 愛人 is the standard term, be aware that it can sound blunt or sensational in some contexts. In polite conversation, euphemisms or indirect phrasing may be preferred. Also, 愛人 can refer to a male lover as well, so context is key.
愛人 is the most common and neutral term for a mistress in the sense of an extramarital lover. 情婦 is more formal and specifically female, often used in written or literary contexts. 二号さん is colloquial and dated, implying a kept woman.
He had a mistress besides his wife.