YOU SAID:

when the going gets tough. the tough gets going

INTO JAPANESE

行くことが厳しくなるとき。タフなことが起こる

BACK INTO ENGLISH

When going becomes tough. Tough things happen

INTO JAPANESE

行くときは厳しい。難しいことが起きる

BACK INTO ENGLISH

It is tough when going. Difficult things happen

INTO JAPANESE

行くときは難しい。難しいことが起きる

BACK INTO ENGLISH

It is difficult when you go. Difficult things happen

INTO JAPANESE

あなたが行くときは難しいです。難しいことが起きる

BACK INTO ENGLISH

It is difficult when you go. Difficult things happen