Mayumi Negishi for the WSJ:
DoCoMo abandoned its policy to protect all its suppliers equally from competition from global smartphone heavyweights.
It all started crumbling down in 2008 for Japanese phone manufacturers . Since then, Sanyo, Mitsubishi, Hitachi, NEC, Panasonic have abandoned the game. Nokia’s Japanese efforts stopped that same year. Kyocera lingers. Fujitsu keeps going niche. Toshiba wants a new youth. Sharp, once so strong, is probably a bit too comfortable in the arms of DoCoMo not to be anxious of the forthcoming iPhone on the same network.