The airplane took off from Naha Airport at 12:59 Japanese Standard Time. When the airplane was cruising at an altitude of 39,000ft, it encountered a moderate turbulence caused by strong upward wind at 14:27. This wind is believed to have been made by the convective activity activated by a nearby warm front. One of the cabin crew, standing in a galley located in the almost center of the airplane, struck her stomach against a floor and one of her sibs was broken.