On Tuesday, Team Melli beat Pakistan in straight sets (25-20, 25-19, 25-20) at the Chiba Port Arena.
The three-time titlist inked its way into to top eight teams after following the Preliminary Round of the competition.
Saber Kazemi score a match-high 17 points with captain Milad Ebadipour adding 14 more markers for Iran’s victory.
Iran has been drawn in Pool F along with South Korea, Chinese Taipei and Pakistan.