The big rumor out of Japan today has NEC locked in heated negotiations with existing joint venture Casio Hitachi Mobile Communications to add itself into the mix -- a JV that's currently a 51 / 49 percent ownership split between Casio and Hitachi, respectively -- with NEC wanting to pick up a total of 50 percent of the combined operation. Japan's one of the more competitive, low-margin mobile markets in the world (just ask Mitsubishi) so it mak
