I don't think a social revolution alone would change things. A lot of the Japanese social ethos has remained unchanged for years. In general their way of life has always been one of patriarchy, stoic perseverance and a need to not inconvenience other people or bring 'shame' to their situaiton. There are some ills that go along with their unique cultural ideals, but if anything, I'd say the reason they're able to keep going in this day and age with such a low crime rate and strong economy relative to other modern nations is because of some of these very characteristics.
So why is there sudden disillusionment, why is their way of life suddenly causing them such trouble? It's corrupt government, an increasing amount of technological diversions, more stressed out workers who need to unwind after work, and a general widening of the poverty gap, (which is an emerging trend globally, it's not just happening in Japan,) that are causing these problems. People everywhere are becoming less concerned for one another and more concerned with filling in their bottom line and satisfying themselves. I would like to see the things that make Japanese culture beautiful stay strong however. I would definitely support some kind of push towards more community oriented values. I just don't think its the complete solution.