Afterward, it slowly weakened, and after passing east of Okinawa, Oliwa turned northeast and struck Japan with winds of 85 mph (137 km/h).

On September 2, the Central Pacific Hurricane Center (CPHC) initiated advisories on Tropical Depression Two-C about 590 miles (950 km) southwest of Johnston Island, slightly east of the International Date Line.

A moderately powerful ridge persisted north of Tropical Storm Oliwa, which caused a slow west to west-northwest track.

Upon entering the western Pacific Ocean, the Joint Typhoon Warning Center (JTWC) and the Japan Meteorological Agency (JMA) began issuing advisories on the system (9719).

[4] The JMA, which is the official agency of the western Pacific, assessed Oliwa as reaching a peak of 115 mph (185 km/h) 10-min winds), with a pressure of 915 mbar.

[4] After maintaining peak intensity for 36 hours, Oliwa gradually weakened as it continued to the west-northwest, during which it passed through the Northern Marianas Islands.

[5] On the Japanese island of Kyushu, where Oliwa made landfall as a weakened typhoon, thousands of homes were flooded, and dozens were destroyed.

[7][8] Offshore the South Korea coast, the winds and strong waves wrecked 28 vessels, and 10 people were reported missing from one ship.

Oliwa's track was unusual, due to its origin as a cyclone from the central Pacific Ocean and its path over the Northern Marianas Islands and Japan.