It's very interesting to read and hear about because Japan has a very unique social problem that their elderly and retired populations is not proportional to their youth and working population. Maybe Bitcoin can inject rejuvenation and energy into their economy.
Bitcoin can indeed help by infusing needed funds coming from the earnings of Bitcoin investment. Their mutual funds and savings in the banks are not really earning anything so that is a big worrisome for many since whether you like it or not there will always be inflation and other economic challenges. I am not wondering why there will be more and more Japanese and money managers who will drove to Bitcoin as one of the best alternatives if not the only best for now.