The 18-year-old became the first female athlete to bag the honour in the history of Asian Games.
Ikee also received a cheque of $50,000.
After returning to Japan, Ikee learned that she had won the Most Valuable Player award for the tournament, the first for a female athlete at the Games. She then returned to Indonesia to collect the trophy and prize money.
Ikee is also the national record holder in the 50-meter freestyle and the 100-meter butterfly, and the junior world record holder in the 50-meter freestyle and 50-meter butterfly long-course events, and the 50- and 100-meter butterfly, and 100-meter individual medley in short course.