YOU SAID:

The chocolate he had had had had no effect on him

INTO JAPANESE

彼が持っていたチョコレートは彼に影響を与えませんでした

BACK INTO ENGLISH

The chocolate he had did not affect him

INTO JAPANESE

彼が持っていたチョコレートは彼に影響を与えませんでした

BACK INTO ENGLISH

The chocolate he had did not affect him