Tell me, in which of these segments have they lost market share to competitors?
I suspect they have lost market share in all of these items to the chinese— much like the US. The chinese copy other intellectual property— much like Japan used to do.
It is simply cheaper to manufacture out of china these items.
It does not mean that Japan or China are particularly better at generating revolutionary ideas than the US. Japan is a less closed society than China so that helps it significantly.