Major manufacturers such as Honda Motor Co. and Mitsubishi Motors Corp. have resumed operations at their plants after a powerful earthquake in Osaka and other parts of western Japan on Monday morning.

Honda restarted the production line at its Suzuka factory in Mie Prefecture after confirming safety. Mitsubishi Motors briefly shut down production at two plants in Kyoto and Shiga prefectures, while Daihatsu Motor Co., a subsidiary of Toyota Motor Corp., suspended operations at two plants in Osaka and Kyoto prefectures.

Following the magnitude-6.1 quake, Panasonic Corp. stopped operations at two plants in Osaka Prefecture as some workers were unable to get to work due to traffic disruption. At least 29 employees were slightly injured either at home or on the way to work, the electronics maker said.

Sharp Corp. confirmed there was no damage to its display panel plant in Sakai, Osaka. Air conditioner maker Daikin Industries Ltd. said one of its chemical plants in the prefecture suspended operations automatically.

Department store operators in the prefecture decided not to open as scheduled or to close early.

The restaurant industry was also affected.

Yoshinoya Holdings Co., operator of the Yoshinoya "gyudon" beef bowl restaurant chain, temporarily closed around 40 outlets, some of which reopened are safety checks were completed.

Japan Post Co. said parcel and express mail deliveries in the Kinki and other regions could be delayed for around half a day.

JXTG Nippon Oil & Energy Corp. said a refinery in Osaka Prefecture operated by one of its subsidiaries suspended production and shipments.