The national Iranian team first eased past Uzbekistan 19-5 at the Kinjo Futo Station Square Venue, then beat hosts Japan 18-16 in their second match, according to Tehran Times.
Mahla Abedi finished as the highest scorer for the Persians with eight points, while Japanese Yuki Hirashita scored five points.
Iran will face Chinese Taipei in Group B on Tuesday.
The women's 3x3 basketball tournament at the 2026 Asian Games is being held in Nagoya, Aichi Prefecture, Japan from Sept. 10 to 20.
The tournament is restricted to players aged 23 and under.
MNA