なん  さい  です  か
Nan sai desu ka
How old are you?
CASUAL - BETWEEN YOUNG PEOPLE AND FRIENDS
Nan sai? (Casual)
なん  さい？
  • How old are you?
Juu-san sai.
じゅうさん　さい
  • Thirteen (years old).
Juu-yon sai.
​じゅうよん　さい
  • Fourteen (years old).
FORMAL - FULL SENTENCES
Nan sai desu ka?
なん　さい　です　か
  • How old are you?
(Watashi wa) juu-san sai desu.
わたし　は、じゅうさん　さい　です。
  • I am 13 years old.
(Watashi wa) juu-yon sai desu.
わたし　は、じゅうよん　さい　です。
  • I am 14 years old.​​
'Sai' means 'years of age'. We always add the word 'sai' after the number when we're talking about age.
PRACTISE LANGUAGE FOR SAYING NAMES AND AGES ON QUIZLET
Talking and Asking About Ages.pdf
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Right click on the file above and open in a new tab to review talking and asking about ages.
AGES 1 - 10
Picture
KYUU SAI
is-sai *
いっさい
  • 1 year old
​ ​ni sai
にさい
  • ​2 years old
san sai
さんさい
  • ​3 years old
yon sai
よんさい
  • ​4 years old
go sai
ごさい 
  • ​5 years old
roku sai
ろくさい
  • 6 years old
nana sai
ななさい
  • 7 years old
has-sai *
はっさい
  • 8 years old
kyuu-sai
きゅうさい
  • 9 years old
ju-s-sai *
じゅっさい
  • 10 years old
The asterisked ages have a pronunciation change. The number gets 'mooshed' together with the word, 'sai'.
e.g. ichi + sai = is-sai; hachi + sai = has-sai
AGES 11 - 20
Picture
JUU-YON SAI
juu-is-sai
じゅういっさい
  • 11 years old
juu-ni sai
じゅうにさい
  • 12 years old
juu-san sai
じゅうさんさい
  • 13 years old
juu-yon sai
じゅうよんさい
  • 14 years old
juu-go sai
じゅうごさい
  • 15 years old
juu-roku sai
じゅうろくさい
  • 16 years old
juu-nana sai
じゅうななさい
  • 17 years old
juu-has-sai
じゅうはっさい
  • 18 years old
juu-kyuu sai
じゅうきゅうさい
  • 19 years old
hatachi !!
はたち
  • 20 years old
'Hatachi'  or 20 years old, is traditionally the age of adulthood in Japan. 
To say ages over 20, find out how to say the number, then apply the rules for saying ages that you have learnt here.