YOU SAID:

The job that he had had had had an impact

INTO JAPANESE

彼が就いていた仕事は影響を与えた

BACK INTO ENGLISH

The job he had had an impact

INTO JAPANESE

彼の仕事は影響を与えた

BACK INTO ENGLISH

his work influenced

INTO JAPANESE

彼の作品に影響を与えた

BACK INTO ENGLISH

influenced his work

INTO JAPANESE

彼の作品に影響を与えた

BACK INTO ENGLISH

influenced his work