How to Say "My Son" in Japanese

息子

musuko[mɯ̟sɨ̥ko̞]

The Japanese phrase for "my son" is 息子 (musuko).

息子 means "son" and is used to refer to your own male child. In casual conversation, you can simply use 息子 to mean "my son".

How does it change in a sentence?

息子 is a noun and its form does not change whether you are talking about one son or multiple sons.

musuko

While you use 息子 to describe your own son, you should never use it to address him directly. Instead, parents usually call their sons by their given name or a nickname.
Using 息子 when talking to a superior is a form of humble language designed to lower the status of the speaker's own family.
In very formal settings, such as when writing a letter or a formal biography, a person might refer to their own son as 嫡男 (chakunan), meaning 'legitimate eldest son'.

息子は八歳です。
My son is eight years old.
This sentence shows how to state the age of your 息子.
Tatoeba #10798107 by small_snow, translation #5023310 by CarpeLanam
息子は５歳です。
My son is five years old.
Tatoeba #11052356 by small_snow, translation #10739384 by Cabo
息子はどこかしら？
Where's my son?
This sentence is useful for asking about the location of your 息子.
Tatoeba #3573632 by arnab, translation #2254653 by CK
うちの子はとても賢いですよ！
My son is very smart!
113 more sentences on Tatoeba

Ren and Misaki are talking about their families.

蓮 Ren

息子は今、大学に通っています。
Musuko wa ima, daigaku ni kayotte imasu.
My son is attending university now.
美咲 Misaki

それはいいですね。何を勉強しているんですか？
Sore wa ii desu ne. Nani o benkyou shite iru n desu ka?
That's nice. What is he studying?
蓮 Ren

息子は経済学を専攻しています。
Musuko wa keizaigaku o senkou shite imasu.
My son is majoring in economics.
美咲 Misaki

すごいですね！
Sugoi desu ne!
That's impressive!

Sources

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