The social structure of Japan traditionally rests on the group and the household. This cultural importance is directly reflected in the language, making the vocabulary of the family in Japanese far more nuanced than in English. It’s not enough to simply translate “father” or “mother” – you need to know who you’re addressing and who you’re talking about.
The system is based on the distinction between the inner circle (Uchi) and the outer circle (Soto). Humble terms are used when speaking about one’s own relatives to an interlocutor, and honorific terms are used when mentioning the latter’s family. Mastering these distinctions prevents appearing rude or arrogant during a conversation.
To properly understand how these relationships are structured, it’s useful to know the Japanese family names that define lineage. Here’s a complete and structured list to navigate with ease between the different degrees of politeness and kinship.
Parents: Father and Mother
This is where the distinction between “my family” and “your family” is most frequent. Humble terms are short and without honorifics, whilst polite terms often include the prefix “O” and the suffix “San”.
- 父 (chichi): My father (humble, when speaking to others)
- お父さん (otōsan): Your father / Father (polite, when addressing one’s own father or speaking of another’s father)
- 母 (haha): My mother (humble)
- お母さん (okāsan): Your mother / Mother (polite)
- 両親 (ryōshin): My parents
- ご両親 (goryōshin): Your parents
Siblings: Brothers and Sisters
Japanese places great importance on age within the sibling group. There isn’t a common generic word to simply say “brother” or “sister” without specifying whether they are older or younger. Seniority often implies particular respect marked by the language.
- 兄 (ani): My big brother
- お兄さん (onīsan): Your big brother / Big brother
- 姉 (ane): My big sister
- お姉さん (onēsan): Your big sister / Big sister
- 弟 (otōto): My little brother
- 弟さん (otōtosan): Your little brother
- 妹 (imōto): My little sister
- 妹さん (imōtosan): Your little sister
- 兄弟 (kyōdai): Brothers and sisters / Siblings
Grandparents
As with parents, the terms change according to belonging. Be careful with the pronunciation of long vowels: “Ojīsan” (grandfather) must not be confused with “Ojisan” (uncle). The lengthening of the sound completely changes the meaning of the word.
- 祖父 (sofu): My grandfather
- おじいさん (ojīsan): Your grandfather / Grandfather
- 祖母 (sobo): My grandmother
- おばあさん (obāsan): Your grandmother / Grandmother
- 祖父母 (sofubo): My grandparents
The Couple: Husband and Wife
Conjugal vocabulary is probably the most complex as it reflects ancient social norms. There are numerous ways to refer to one’s spouse or that of another, with nuances ranging from informal affection to very formal respect.
- 夫 (otto): My husband (standard)
- 主人 (shujin): My husband (traditional, literally “master of the house”)
- ご主人 (goshujin): Your husband
- 妻 (tsuma): My wife (standard)
- 家内 (kanai): My wife (traditional, implies “the one who is at home”)
- 奥さん (okusan): Your wife (very common respectful term)
- 嫁 (yome): Wife / Daughter-in-law (sometimes used by men to speak of their wife, but technically refers to daughter-in-law)
- 夫婦 (fūfu): A married couple
Children and Grandchildren
During celebrations or family gatherings, this Japanese family vocabulary is often used to introduce one’s descendants. For other people’s children, honorific suffixes “-san” or “-chan” (for younger ones) are almost systematically added.
- 息子 (musuko): My son
- 息子さん (musukosan): Your son
- 娘 (musume): My daughter
- 娘さん (musumesan): Your daughter
- 子供 (kodomo): My child / The children
- お子さん (okosan): Your child
- 孫 (mago): My grandchild
- お孫さん (omagosan): Your grandchild
Extended Family: Uncles, Aunts and Cousins
These terms are useful not only for actual family, but also as honorific titles for strangers. It’s common for a child to call a middle-aged man “Ojisan” (Uncle) even without family ties, as a mark of respectful familiarity.
- 叔父 / 伯父 (oji): My uncle (伯父 if elder of the parent, 叔父 if younger)
- おじさん (ojisan): Your uncle / Uncle (short vowel “i”)
- 叔母 / 伯母 (oba): My aunt (伯母 if elder of the parent, 叔母 if younger)
- おばさん (obasan): Your aunt / Aunt (short vowel “a”)
- 従兄弟 (itoko): Cousin (identical pronunciation regardless of gender)
- 親戚 (shinseki): Relatives / Kin
In-laws (by marriage)
To refer to in-laws, Japanese often uses direct family terms preceded by “Giri no” (of duty / by obligation). This clarifies the legal relationship without erasing the family position.
- 義理の父 (giri no chichi): Father-in-law (spouse’s father)
- 義理の母 (giri no haha): Mother-in-law (spouse’s mother)
- 義理の兄 (giri no ani): Brother-in-law (older)
- 義理の弟 (giri no otōto): Brother-in-law (younger)
- 婿 (muko): Son-in-law
- 嫁 (yome): Daughter-in-law
Counting Family Members
In Japanese, a specific counter is used for people: the suffix “nin” (人). However, as often with counters, the first two numbers are irregular and must be memorised by heart.
- 一人 (hitori): One person
- 二人 (futari): Two people
- 三人 (sannin): Three people
- 四人 (yonin): Four people (note: not “yonnin”)
- 何人 (nannin): How many people?
- 家族 (kazoku): The family
- 何人家族ですか (nannin kazoku desu ka): How many are you in your family?
Affectionate and Familiar Terms
At home, the strict rules of politeness often relax, especially towards young children. These terms should be avoided in a professional or formal context, but are omnipresent in manga and anime.
- パパ (papa): Dad
- ママ (mama): Mum
- お兄ちゃん (onīchan): Big brother (affectionate)
- お姉ちゃん (onēchan): Big sister (affectionate)
- じいじ (jīji): Grandpa (childish language)
- ばあば (bāba): Grandma (childish language)