Rio Olympics gold medalist Yazdani defeated Lebanese Domenic Abounader by technical superiority at the Jakarta Convention Center Assembly Hall.
Iranian Poomsae practitioners Koorosh Bakhtiyar and Marjan Salahshouri had already won two silver medals in the first day.
Wrestler Reza Atri also claimed a bronze medal in the men’s freestyle 57kg.
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 scheduled to be held 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.
These are the 18th edition of the quadrennial event.