Japan’s four major tire manufacturers – Bridgestone Corp. (TYO:5108), Sumitomo Rubber Industries Ltd. (TYO:5110), Yokohama Rubber Co. Ltd. (TYO:5101) and Toyo Tires Corp. (TYO:5105) – are all forecasting improvements at the operating profit level for calendar 2020. Bridgestone is using adjusted operating profit here, while Sumitomo Rubber and Yokohama Rubber use business profit. However, with Bridgestone noting that it is…