Typhoon Ione was a catastrophic and deadly tropical cyclone that left over 512 confirmed deaths and another 326 to be missing as it affected Japan, with the majority of the fatalities coming from the city of Ichinoseki in Iwate Prefecture.

It rapidly organized to a Category 4 typhoon and reached its peak intensity on the next day before slowly weakening as it started to approach the Japanese archipelago, while curving to the northeast.

It then passed through the southern coast of Hokkaido, before gradually degraded to a tropical storm as it emerged in the Pacific Ocean on the next day.

[4] Moving to the northwest, it started to rapidly intensify under a favorable environment, becoming a Category 4 typhoon at 12:00 UTC of September 14, nearly 1,023 km to the southeast of Miyakonojō.

[4][5][6] While inland, Ione rapidly weakened to a tropical storm as it moved to the Pacific Ocean, with the system starting extratropical transition.

[10][11] Two hotels were also isolated due to a large landslide, trapping inside over a hundred Americans who were just staying in the place for the typhoon.

[12] In addition, due to another extratropical storm in the Sea of Japan, the combined effects of the system and the typhoon caused heavy rainfall as far as Hokkaido.