YOU SAID:

He got hair down to knees.

INTO JAPANESE

彼は髪を膝に下ろした。

BACK INTO ENGLISH

He put his hair on his knee.

INTO JAPANESE

彼は膝の上に髪を置いた。

BACK INTO ENGLISH

He put his hair on the knee.

INTO JAPANESE

彼は膝の上に髪を置いた。

BACK INTO ENGLISH

He put his hair on the knee.