In Japanese, ‘beautiful’ is;
So if you want to tell someone they are beautiful you say,
Anata wa kirei desu.
Anata wa totemo kirei. (‘toremo’ means ‘very’)
‘Kirei’ is normally used for women, not men.
To men, you should say;
Totemo kakko-ii (very cool) !
Kirei and Kawaii
Most Japanese women also like to be told kawaii (meaning ‘cute’).
‘Kawaii’ has different meanings, like ‘nice’, ‘little(small)’, ‘good’, but it is always very positive.
When a Japanese lady says ‘kawaii!’, she may just mean ‘I like it!’. They could admire almost everything in the same way, such as cars, cosmetics, people, animals…
If you say to a Japanese lady ‘kawaii (you are cute), she will be very happy!