Some graph-making and data-pulling by Eurotechnology Japan has proven your worst fears true. Three relatively new, mobile-focused game makers (GREE, GungHo, DeNA) have had a higher operating income and higher net income since the last financial year than the combined, Voltron-like forces of Nintendo, Sony, Namco Bandai, Konami, Takara Tomy, Square Enix, Capcom, and Tecmo Koei.
The article points out that GREE has been struggling a bit of late, with income dipping, but also that the infographic doesn't include GungHo data for the full year, so that little red line representing those three companies will still be going higher. Meanwhile, nine of Japan's biggest gaming juggernauts have seen steady decline since 2008, though the annual net is on the rise since 2012.
GungHo + DeNA + GREE overtake Japan’s game icons [Eurotechnology Japan]