It collapse for many reasons.
House hold appliances - Chinese just make their own
Cell Phones - Apple + Samsung are superior in quality, Chinese superior in cost.
DVD players Walkman VHS recorder - Museum technology
Gaming Console - Still good but has competition from Xbox
Computers Labtop - Just not competitive because too expensive, people rather buy Apple, Samsung, Lenovo,
TV - people don't watch as much TV anymore, also Samsung
Camera - Still good but many people don't see the point when a smartphone has a gazillion megapixels.
Add to the fact that the Japanese Yen was unnaturally strong from 2008-2012 (was trading at 1USD - 78 Yen compared to right now at 1USD - 102 Yen), consumers just didn't want to buy expensive Japanese products when they are not exactly better than others.