There are 70 million registered passenger vehicles in Japan; 4 million of those are identified as sports cars and ``sporty'' cars (such as the Mazda RX-7, Toyota Supra and some high-level versions of cars like the Integra Type R).
Tire demand for that vehicle category, according to Yokohama Rubber Co. Ltd. executives, is 300,000 units per month.
Of those units, the segment can be divided into four sub groups:
* Touring tires (called ``comfort'' tires by the Japanese)-100,000 units a month.
* Mid-level performance tires-150,000 units per month.
* Premium performance lines (such as Yokohama's Advan Neova)-40,000 units a month.
* ``S'' tires (in the U.S. called DOTR-type tires, which are street-legal but compounded for racing purposes)-10,000 units a month.