Iran claimed the title for the third time.
Ali Mirshekari (two goals), Movahed Mohammadpour, Moslem Mesigar, Mohammad Ali Mokhtari and Kosuke Matsuda (own goal) were on target for Iran.
Earlier in the day, Oman beat the UAE 4-2 to finish in the third place.
The win saw Iran draw level with Japan on three titles each, with both teams now casting their eyes on preparing for the FIFA Beach Soccer World UAE 2023 in November.