The Iranian team defeated Singapore 5-2 in the final match.
Chinese Taipei claimed the bronze medal after beating Japan 11-3.
For the first time, canoe polo is being contested as demonstration sport. Medals awarded in the category will not count towards the final tally.
The 2018 Asian Games, officially known as the 18th Asian Games and also known as Jakarta Palembang 2018, is a pan-Asian multi-sport event. The event is underway from 18 August to 2 September in the Indonesian cities of Jakarta and Palembang.
The athletes compete in 465 events across 40 sports and 67 disciplines.