 Early on September 16 the JMA started to issue Typhoon force wind warnings, for the Naha, Okinawa; however these were discontinued later that day. The JMA then placed the Yokohama, Moji and Naha under a Typhoon Warning early the next day. These warnings were kept in place until early on September 19, when the JMA added the Kushiro and Otaru to the warnings. However, the warnings were dropped for all areas except Yokohama and Kushiro as the typhoon turned away from Japan. These warnings stayed in effect until late the next day when they were cancelled as Choi-wan began to dissipate.
