(さい)

さい
counter
years old (counter)
number
1. years old, years of age
A counter used to express a person's age in years.
彼女(かのじょ)20(さい)です。
She is 20 years old.
How old are you?
Children can enter elementary school from age 5.
This refers to the Japanese school system

(さい) is the standard counter for age.

Counting patterns

1: 一歳(いっさい) 6: 六歳(ろくさい)
2: 二歳(にさい) 7: 七歳(ななさい)
3: 三歳(さんさい) 8: 八歳(はっさい)
4: 四歳(よんさい) 9: 九歳(きゅうさい)
5: 五歳(ごさい) 10: 十歳(じゅっさい)

  • 1: いっさい (sokuon + sound change)
  • 8: はっさい (sokuon + sound change)
  • 10: じゅっさい (sokuon)
  • 20: はたち (二十歳(はたち)) - special reading

Special age

Alternative

  • (さい): simplified version, same meaning and reading

Common questions