YOU SAID:
He kissed him then walked up the hill.
INTO JAPANESE
彼は彼にキスをして、丘を登りました。
BACK INTO ENGLISH
He kissed him and climbed the hill.
INTO JAPANESE
彼は彼にキスをして丘を登った。
BACK INTO ENGLISH
He kissed him and climbed the hill.
That didn't even make that much sense in English.