YOU SAID:

He's there for the long haul.

INTO JAPANESE

彼は長距離のためにそこにいます。

BACK INTO ENGLISH

He is there for a long distance.

INTO JAPANESE

彼は長い間そこにいます。

BACK INTO ENGLISH

He has been there for a long time.

INTO JAPANESE

彼は長い間そこにいた。

BACK INTO ENGLISH

He was there for a long time.

INTO JAPANESE

彼は長い間そこにいた。

BACK INTO ENGLISH

He was there for a long time.