Japanese mobile company KDDI <9433.T> is focusing on an offer with Apple to market the apple iphone 5 in Japan, a resource acquainted with the problem told Reuters. The Nikkei Business magazine had earlier reported that KDDI would begin selling the apple iphone 5 around November, causing a 12 % slump in shares of Softbank Corp <9984.T>, so far the only provider from the apple iphone in Japan.