YOU SAID:

If the going gets tough, the tough gets going

INTO JAPANESE

行くことが厳しくなるならば、タフは行く

BACK INTO ENGLISH

If going tough becomes tough, tough will go

INTO JAPANESE

タフに行くのが難しい場合は、タフに行くだろう

BACK INTO ENGLISH

If it is difficult to go to the tough, you will go tough

INTO JAPANESE

タフに行くのが難しい場合は、あなたはタフに行くでしょう

BACK INTO ENGLISH

If it is difficult to go to the tough, you will go tough