Japanese has many specific words for family members — and two that confuse English speakers are 息子 (musuko) and 子供 (kodomo). Both relate to children, but they are not interchangeable. Using the wrong one in conversation can create awkward misunderstandings. This guide breaks down exactly when to use each word.
YukaRei, my teacher mentioned むすこ and こども today. What’s the difference?
ReiGreat question! Both come up a lot in everyday Japanese. The trick is knowing which context calls for which — let me show you!
At a Glance: むすこ vs. こども
| Feature | むすこ (musuko) 息子 | こども (kodomo) 子供 |
|---|---|---|
| Core meaning | Son (male child) | Child / children (any gender) |
| Kanji | 息子 | 子供 / 子ども |
| Specifies gender? | Yes — always male | No — gender-neutral |
| Age range | Any age (even adult son) | Usually young (under ~15) |
| Family relationship? | Yes — always “someone’s son” | Not necessarily (can mean children in general) |
| JLPT level | N4 | N5 |
むすこ (息子) — Son
息子 (musuko) specifically means “son” — a male child in relation to a parent. This word is always relational; it only makes sense when referring to someone’s son. You would never use 息子 to describe a random male child on the street — that child is not your son.
息子 can refer to a son of any age — from a baby to an adult in his 40s. The relationship is what matters, not the age.
Example 1 — talking about your own son:
私の息子は今年、大学を卒業しました。
Watashi no musuko wa kotoshi, daigaku wo sotsugyou shimashita.
My son graduated from university this year.
Example 2 — asking about someone’s son:
息子さんはお元気ですか？
Musuko-san wa ogenki desu ka?
Is your son doing well?
Example 3 — sister’s son (nephew):
姉の息子はまだ3歳です。
Ane no musuko wa mada san-sai desu.
My older sister’s son is only 3 years old.
YukaI see… so context really matters with むすこ? It’s not just about the literal meaning?
ReiRight! Japanese often works that way. むすこ especially has nuances that go beyond a direct translation — keep that in mind.
こども (子供) — Child / Children
子供 (kodomo) means “child” or “children” and is gender-neutral. It can refer to your own child, someone else’s child, or children in general. It implies youth — typically under middle school age — though context can extend the range slightly.
Note: The kanji spelling 子供 is traditional. Some modern usage prefers 子ども (using hiragana for the second character) to avoid an outdated connotation of the 供 kanji, but both forms are widely accepted.
Example 1 — children in general:
子供たちは公園で遊んでいます。
Kodomo-tachi wa kouen de asonde imasu.
The children are playing in the park.
Example 2 — your own child (either gender):
私の子供はまだ小学生です。
Watashi no kodomo wa mada shougakusei desu.
My child is still in elementary school.
Example 3 — child-friendly context:
このレストランは子供向けのメニューがあります。
Kono resutoran wa kodomo muke no menyuu ga arimasu.
This restaurant has a children’s menu.
YukaGot it. And こども — is that the opposite, or more like a different usage?
ReiMore of a different usage! こども carries its own feel. Comparing them together like this is actually the fastest way to master both.
Politeness and Humble/Honorific Forms
Japanese has different words depending on whether you are talking about your own family or someone else’s. This is an important cultural distinction:
| Situation | Word for son | Word for child |
|---|---|---|
| Talking about YOUR OWN son | 息子 (musuko) | 子供 (kodomo) |
| Referring to SOMEONE ELSE’S son | 息子さん (musuko-san) | お子さん (okosan) |
| Formal/honorific for someone’s child | ご子息 (goshisoku) | お子様 (okosama) |
Adding さん or お…さん is the standard way to show respect when discussing another person’s family member.
Side-by-Side Comparison
| Japanese | Meaning | When to use | Example |
|---|---|---|---|
| 息子 (musuko) | Son (male child of a parent) | Referring to a male child as someone’s son | 私の息子は医者です (My son is a doctor) |
| 子供 (kodomo) | Child (gender-neutral, general) | Referring to young people in general or your child of any gender | 子供が好きです (I like children) |
| 娘 (musume) | Daughter (female child) | Referring to a female child as someone’s daughter | 私の娘は中学生です (My daughter is in middle school) |
| お子さん (okosan) | Your child (honorific) | Asking about or referring to someone else’s child | お子さんはいますか？(Do you have children?) |
Decision Flowchart: むすこ or こども?
Are you talking about a child?
|
v
Is the child specifically male AND you are
referring to the parent-child relationship?
| |
YES NO
| |
v v
Use 息子 (musuko) Are you talking about
(son — relational, children in general,
always male) or a child of any gender?
|
v
Use 子供 (kodomo)
(child — neutral, general)Quick Quiz — Test Yourself!
YukaI think I’ve finally got it! Let’s take the quiz to be sure.
ReiPerfect confidence check! Let’s go — you’ve got this!
Fill in the blank with 息子 (musuko) or 子供 (kodomo).
Q1. My son is a high school student.
私の＿＿＿は高校生です。
Watashi no ___ wa koukousei desu.
Answer: 息子 (musuko)
Reason: We are talking about a specific male child in relation to the speaker (their son), so 息子 is correct.
Q2. There are a lot of children in this neighborhood.
この町には＿＿＿がたくさんいます。
Kono machi ni wa ___ ga takusan imasu.
Answer: 子供 (kodomo)
Reason: We are talking about children in general (no gender, no parental relationship specified), so 子供 is correct.
Q3. Do you have children?
お＿＿＿さんはいますか？
O-___ -san wa imasu ka?
Answer: 子 (ko) → お子さん (okosan)
Reason: When asking about someone else’s children (either gender), the honorific form お子さん is used.
Q4. Her son lives in Tokyo.
彼女の＿＿＿は東京に住んでいます。
Kanojo no ___ wa Tokyo ni sunde imasu.
Answer: 息子 (musuko)
Reason: We are talking about her male child in the context of the parent-child relationship, so 息子 is correct.
Q5. I want to teach children Japanese someday.
いつか＿＿＿に日本語を教えたい。
Itsuka ___ ni nihongo wo oshietai.
Answer: 子供 (kodomo)
Reason: This refers to children in general (no specific gender or relationship), so 子供 is correct.
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あわせて読みたい
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