YOU SAID:

He jumped onto the mat which was placed under the ceiling

INTO JAPANESE

彼は天井の下に置かれたマットに飛び乗った

BACK INTO ENGLISH

He jumped on a mat placed under the ceiling

INTO JAPANESE

彼は天井の下に置かれたマットに飛び乗った

BACK INTO ENGLISH

He jumped on a mat placed under the ceiling