Some of Japan’s biggest firms including Sony and Toyota shut down operations in southern Japan Friday after the region was struck by a deadly earthquake, fueling worries about disruption to supply lines and possible effects on the wider economy. At least nine people were killed in Thursday night’s 6.5-magnitude quake, which also toppled houses and buckled roads on the southwestern island of Kyushu. With widespread damage to infrastructure, several companies — including in the steel, […]