Rubber manufacturers in the Japanese prefectures of Kumamoto and Oita have been greatly affected by a recent string of earthquakes that have centered on Kumamoto Prefecture, beginning with a foreshock at 9.26 p.m. on April 14. Bridgestone Corp. (TYO:5108) and NOK Corp. (TYO:7240) suspended operations at their respective manufacturing plants in Kumamoto Prefecture. Meanwhile, damage to locally based Tsuchiya Rubber...