Japan’s four largest tire manufacturers have now all announced price increases on aftermarket tires for domestic sale. After Bridgestone Corp. (TYO:5108) announced such a price hike on June 5, Yokohama Rubber Co. Ltd. (TYO:5101) came out with its own on June 14, with Sumitomo Rubber Industries Ltd. (TYO:5110) then following suit on June 21 and Toyo Tire Corp. (TYO:5105) on…