kogan has been a participant of world festivals of high prestige such as the corinthian summer festival (austria), menton music festival (france), montreux jazz festival (switzerland), perth festival (scotland), and music festivals in athens, vilnius, shanghai, ogden and helsinki. he has also participated in the chereshnevy les open-art festival, russian winter (russkaya zima) festival, music kremlin festival, andrey sakharov international art festival and many others.