YOU SAID:

Going to Japan. Do not disturb.

INTO JAPANESE

日本に行く。邪魔しないでください。

BACK INTO ENGLISH

They go to Japan Don't disturb.

INTO JAPANESE

彼らは日本に行く邪魔をしないでください。

BACK INTO ENGLISH

Don't get in the way of them going to Japan.

INTO JAPANESE

彼らが日本に行くのを邪魔するな。

BACK INTO ENGLISH

Don't disturb them from going to Japan.

INTO JAPANESE

彼らが日本に行くのを妨げないで。

BACK INTO ENGLISH

Don't prevent them from going to Japan.

INTO JAPANESE

彼らが日本に行くのを妨げないでください。

BACK INTO ENGLISH

Don't prevent them from going to Japan.