Ōsumi Islands
JMA reported that Jangmi became an extratropical cyclone near the Ōsumi Islands early on October 1, and the system kept moving eastward rapidly during that day. Remaining weak and shallow, it began to drift east-southeastward slowly by early on October 2. Since the noon on the same day, the system turned to drift southward very slowly. It ultimately dissipated near Iwo Jima on October 5.