Kojo, winner of the 2024 player of the year award of Kyrgyzstan, penned a 3.5-year deal for an undisclosed fee.
Kojo, 26, joined Esteghlal from Dinamo Samarqand of Uzbekistan.
He has played 23 times for Kyrgyzstan national team and scored 10 goals.
Esteghlal was looking to sign him in summer, but the Uzbek club didn’t allow him to leave the team.
The Blues, headed by Pitso Mosimane, sit 10th in the 16-team league of Iran.