Tokai Carbon Co. Ltd.’s (TYO:5301) carbon black business is on the rebound after bottoming out during the April–June quarter, says President Hajime Nagasaka. Speaking at a financial results briefing on Nov. 5, Nagasaka said that demand is recovering particularly in the U.S. and Thai markets, adding that the company’s U.S. production bases have utilization rates up in the 90–95 percent…