How to Say ‘One year old’ in Japanese
1歳
1 sai
[eechi sai]
💬 Usage Tip: [歳] is the counter for age. [1歳] means "one year old." Be careful: [1歳] is read [いっさい], not [いちさい]—a classic little trap for learners.
🇯🇵 In Japan: When talking with in-laws about a child, age comes up a lot. In Japan, a baby's first birthday is especially meaningful, and relatives may happily mention that the child is now [1歳].
Phrase Breakdown
1
1
[eechi]
one
The number one. In ages, it combines with 歳 to mean one year old.
1歳の子どもがいます。
There is a one-year-old child.
歳
sai
[sai]
years old; age counter
A counter used for age. With 1, it is read as いっさい.
娘は1歳です。
My daughter is one year old.
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