Grace peaked as a Category 3 typhoon into the modern-day Saffir–Simpson scale two times; upon entering the East China Sea and just near landfall over the mainland Japan.

Airplanes from the 307th Bomb Wing were flown into the Philippines to escape any damages from the approaching Grace and Americans on Okinawa were asked to shelter.

Intensification again halted as Grace continued a westward trajectory before turning towards the north, where it intensified into a Category 2 system by 12:00 UTC of August 14 as it started to impact the Ryukyu Islands.

Shortly after passing near the main island of Okinawa, the JTWC reported that the system started to weaken, degrading to 70 knots (130 km/h; 81 mph) by 18:00 UTC.

The typhoon further continued strengthening back into its initial peak by 12:00 UTC before it made landfall somewhere over the Kagoshima Prefecture at that intensity before weakening inland.

[3] On August 19 at 06:00 UTC (15:00 JST), the FWC downgraded Grace into a low-pressure area while situated over the central portion of the country.

The weathermen at the Tokyo Weather Central also noted that the typhoon may bring rainfall to the Yangtze Valley, where the place was already flooded.

[8] Quonset huts were also wrecked by the storm, and power lines were downed, causing electrical outages on areas of Okinawa but not on all parts of the island.

Over 16 residential areas in Fort Buckner also suffered damages, and high tide flooded 500 homes in coastal places.

[11] A vessel named ‘’Ebisu Maru’’ also sent a distress signal over the East China Sea while the typhoon is strengthening there and was presumed to be lost thereafter.

[13] Many tourists over Mount Fuji were stranded there and intermittent weather also halted the arrival of SS President Cleveland into Yokohama Harbor.

2 Sakae Maru’’, a 46-ton vessel also sank during the storm; out of its 45 crew, 32 were successfully rescued and 13 were declared dead as search operations for them were called off by August 23.

[15] 15 more were killed as a fishing boat over the waters of the Man River in present-day South Korea sank and three only managed to swam into safety.