Key takeaways
- Japanese has two completely separate sets of vocabulary for family members: uchi (in-group/humble) terms used when referring to your own family to others, and soto (out-group/honorific) terms used when referring to someone else’s family.
- The same person is called by different words depending on who is speaking: your father is chichi when you mention him to someone outside the family, but otōsan when you address him directly or talk about someone else’s father.
- Japanese family terms also reflect hierarchy and formality: older siblings are addressed with honorifics (onīsan, onēsan); younger siblings are called by name or with familiar terms.
- This system is not simply polite/impolite. It reflects the fundamental Japanese social concept of in-group (uchi) and out-group (soto) relationships, which runs through much of Japanese language and behaviour.
One of the first surprises for Japanese learners is discovering that the vocabulary for family members is not a single list but two parallel lists, one for your own family and one for other people’s families. The system feels counterintuitive until the underlying logic is clear: Japanese humbles what is yours (including your family) when speaking to outsiders, and elevates what belongs to others as a sign of respect.
This guide covers both sets of family terms, how to address family members directly, the hierarchy rules for siblings, and the phrases for introducing and talking about your family.
Navigating the uchi/soto distinction in real conversation is one of those things that requires a live speaker to demonstrate. italki has 30,000+ teachers across 150+ languages, including qualified Japanese teachers who work through the honorific system in practical conversations about real situations.
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The uchi/soto distinction explained
Uchi (内) means inside or in-group, your own household, your own circle. Soto (外) means outside or out-group, everyone else.
In Japanese social life, the distinction between in-group and out-group is fundamental. When speaking about your own in-group to someone outside it, you use humble language for your own group and elevated language for the other person’s group. This applies to family:
- When speaking to a stranger about your father: use the humble/plain form (chichi)
- When asking about or referring to someone else’s father: use the honorific form (otōsan)
- When speaking to your father directly: use the honorific form (otōsan), because you are treating him with the respect owed to a senior within the family hierarchy
This last point is often the most surprising: Japanese children call their parents otōsan and okāsan (the honorific forms) when speaking directly to them, not chichi and haha (the plain forms). The plain forms are only used when mentioning your parents to outsiders.
Core family vocabulary: uchi (your own family) vs. soto (others’ families)
| Relationship | Uchi (own family, plain) | Soto (others’ family, honorific) |
|---|---|---|
| Father | chichi (父) | otōsan (お父さん) |
| Mother | haha (母) | okāsan (お母さん) |
| Older brother | ani (兄) | onīsan (お兄さん) |
| Older sister | ane (姉) | onēsan (お姉さん) |
| Younger brother | otōto (弟) | otōtosan (弟さん) |
| Younger sister | imōto (妹) | imōtosan (妹さん) |
| Son | musuko (息子) | musukosan (息子さん) |
| Daughter | musume (娘) | ojōsan (お嬢さん) |
| Husband | otto / shujin (夫/主人) | goshujin (ご主人) |
| Wife | tsuma / kanai (妻/家内) | okusan (奥さん) |
| Grandfather | sofu (祖父) | ojiisan (お祖父さん) |
| Grandmother | sobo (祖母) | obāsan (お祖母さん) |
| Uncle | oji (叔父/伯父) | ojisan (おじさん) |
| Aunt | oba (叔母/伯母) | obasan (おばさん) |
| Cousin | itoko (従兄弟/従姉妹) | oitokosan (お従兄弟さん) |
| Nephew | oi (甥) | oigosan (甥御さん) |
| Niece | mei (姪) | meigosan (姪御さん) |
How to use the table:
- Speaking to a colleague about your father: Chichi wa isha desu. (My father is a doctor.)
- Asking about a colleague’s father: Otōsan wa ogenki desu ka? (Is your father well?)
- Calling your father on the phone: Otōsan! (Dad!)
A Japanese language tutor can role-play these scenarios so the two sets become automatic in context, which is the only reliable way to avoid mixing them. italki has matched 10M+ learners with teachers since 2007 and has Japanese teachers with experience helping learners from many language backgrounds internalise the uchi/soto system.
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How to address family members directly
When speaking to a family member (not about them), the honorific forms are used, even within the family. This includes terms of address that function as names.
| Family member | How you address them | Literal meaning |
|---|---|---|
| Father | otōsan | honoured father |
| Mother | okāsan | honoured mother |
| Older brother | onīsan / onīchan (more familiar) | honoured older brother |
| Older sister | onēsan / onēchan (more familiar) | honoured older sister |
| Grandfather | ojiisan | honoured grandfather |
| Grandmother | obāsan | honoured grandmother |
Younger siblings and children: Japanese does not have honorific terms for younger siblings, they are called by their given name, often with -chan (younger children, girls) or -kun (boys) attached. Onīsan and onēsan reflect that older siblings occupy a higher position in family hierarchy.
Note on -chan: The -chan suffix is a marker of familiarity and affection, used for young children, female friends, and in close relationships. Onīchan and onēchan are more casual than onīsan and onēsan.
Extended family terms
| Relationship | Uchi (own family) | Soto (others’ family) |
|---|---|---|
| Parents (both) | ryōshin (両親) | goryōshin (ご両親) |
| Siblings (all) | kyōdai (兄弟) | gokyōdai (ご兄弟) |
| Children (all) | kodomo (子供) / musuko, musume | okosama (お子様) |
| Grandparents | sofubo (祖父母) | ojiisan/obāsan |
| In-laws | gifu/gibo (義父/義母) | ogifu-san/ogibo-san |
| Family (general) | kazoku (家族) | gokazoku (ご家族) |
The go- and o- prefixes: Many soto (honorific) forms add go- or o- (both meaning honoured or respected) to the plain form: kazoku becomes gokazoku, ryōshin becomes goryōshin. These prefixes are markers of respect for the other person’s family.
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How to talk about your family
| Japanese | Romanisation | English |
|---|---|---|
| 家族を紹介します。 | Kazoku o shōkai shimasu. | Let me introduce my family. |
| 私は三人家族です。 | Watashi wa sannin kazoku desu. | I have a family of three. |
| 父は会社員です。 | Chichi wa kaishain desu. | My father is an office worker. |
| 母は先生です。 | Haha wa sensei desu. | My mother is a teacher. |
| 兄が一人います。 | Ani ga hitori imasu. | I have one older brother. |
| 妹はまだ学生です。 | Imōto wa mada gakusei desu. | My younger sister is still a student. |
| 一人っ子です。 | Hitorikko desu. | I am an only child. |
| 両親は東京に住んでいます。 | Ryōshin wa Tōkyō ni sunde imasu. | My parents live in Tokyo. |
| 祖父母と同居しています。 | Sofubo to dōkyo shite imasu. | I live with my grandparents. |
How to ask about someone else’s family
| Japanese | Romanisation | English |
|---|---|---|
| ご家族はお元気ですか? | Gokazoku wa ogenki desu ka? | How is your family? (polite) |
| お父さんはどんなお仕事ですか? | Otōsan wa donna oshigoto desu ka? | What does your father do? |
| 兄弟はいますか? | Kyōdai wa imasu ka? | Do you have siblings? |
| 何人兄弟ですか? | Nannin kyōdai desu ka? | How many siblings do you have? |
| お子さんはいますか? | Okosan wa imasu ka? | Do you have children? |
| 何人お子さんがいますか? | Nannin okosan ga imasu ka? | How many children do you have? |
Note the vocabulary shift: kyōdai (plain) when talking about your own siblings, gokyōdai or okosan (honorific) when asking about someone else’s family.
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Cultural context: family hierarchy and honorifics
Hierarchy within the family: Japanese family structure follows a clear hierarchy based on age and position. Parents and grandparents occupy the highest positions; older siblings rank above younger siblings. This hierarchy is encoded in the language: there are specific honorific address terms for parents and older siblings, but not for younger siblings or children.
Shujin vs. goshujin: Shujin (literally: master of the house) is the traditional term a woman uses to refer to her husband to outsiders. Goshujin is the honorific used when referring to someone else’s husband. Both terms carry traditional gender connotations; otto (husband) and tsuma/kanai (wife) are more neutral alternatives increasingly preferred in contemporary use.
Okāsan as a form of address: Okāsan is so strongly associated with the role of mother that it is commonly used not just within families but as a general form of address for middle-aged women in some contexts, particularly by children. The same applies to ojīsan and obāsan for elderly men and women. For relationship vocabulary beyond the immediate family, Japanese for family and relationships covers the wider social language around partners, relatives, and family life.
Japanese particles with family vocabulary: Talking about family requires Japanese particles: は to set the family member as the topic, が to mark them as subject, を to mark what they do to an object. 父は医者です。 / 母がいます。
Putting the system into practice
The uchi/soto distinction in Japanese family vocabulary is one of those systems that learners understand in theory but confuse in practice, because it requires maintaining two parallel vocabulary sets and switching between them depending on the conversational context, not the meaning of the words themselves.
italki has 30,000+ teachers across 150+ languages, including qualified Japanese teachers who work through the uchi/soto system in role-play conversations: introducing your own family, asking about someone else’s, and navigating the situations where the choice matters. Find an online Japanese tutor and practice a family introduction in both directions.
Find your perfect teacher
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FAQ
Why are there two sets of words for family members in Japanese?
Japanese distinguishes between in-group (uchi) and out-group (soto) language. When talking about your own family to outsiders, you use plain/humble forms to downplay your group. When talking about someone else’s family, you use honorific forms to show respect to the other person. The same distinction applies to how you talk about your company, your home, and your own actions in formal contexts.
Why do children call their parents otōsan and okāsan rather than chichi and haha?
When speaking to your parents directly, you use the respectful form (otōsan, okāsan) because your parents hold a senior position in the family hierarchy. The plain forms (chichi, haha) are only used when referring to your parents to people outside the family, as part of the humble in-group language.
What is the difference between shujin and otto?
Both mean husband, but shujin (literally: master) is the traditional term a woman uses when referring to her husband to outsiders. Otto is a more neutral equivalent. Contemporary Japanese usage increasingly prefers otto and tsuma (wife) over the traditional shujin and kanai, which carry older gender role associations.
How do you say you are an only child in Japanese?
Hitorikko desu (一人っ子です). Hitorikko literally means one-person child.
How do you count siblings in Japanese?
Nannin kyōdai desu ka? (How many siblings do you have?), the answer uses counter words: hitori (one person), futari (two people), etc. Ani ga hitori imasu (I have one older brother).
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