The Fire and Disaster Management Agency said 307 people were treated for injuries at hospitals. Most of the injured were in Osaka. Osaka officials did not give details, but the injuries reported in Kyoto and three other neighboring prefectures were all minor.

The quake struck shortly before 8 am north of Osaka at a depth of about 13 kilometers (8 miles), the Japan Meteorological Agency said. The strongest shaking was north of Osaka, but the quake rattled large parts of western Japan, including Kyoto, the agency said.

Dozens of domestic flights in and out of Osaka were grounded, while train and subway service in the Osaka area, including bullet trains, was suspended to check for damage. Passengers exited trains on the tracks between stations.

Some subway service resumed in the afternoon, but stations remained crowded with passengers waiting for trains to restart, many of them sitting on the floor. Long lines of people waited to board bullet trains as they resumed operation.

Some manufacturers, including automakers Daihatsu Motor Co. and Honda Motor Co., electronics makers Panasonic and Sharp Corp., and confectioners Ezaki Glico Co. and Meiji Co., temporarily stopped production lines at their factories in the region for safety checks, news reports said.