That is what government is all about. Japanese government accepted bitcoin is stimulates they economic, now Japan has become the hub of bitcoin and others crypto currencies today because the government create an enabling environment for it. Third world countries should emulates the same thing by adopting bitcoin as a mode of payment and they Economic will turn dramatically.
They just accepted bitcoin as a currency, nothing more.
Stimulating the economy? How? On what level?
In order to really stimulate the economy bitcoin would have to do
something better for the economy than other currencies legal in Japan at this momentWell, other currencies are mostly depreciating
While Bitcoin seems to be heavily appreciating as of late. Maybe, that's the difference you are looking for. Further, it is assumed that Bitcoin is beyond government control, so that could be another quality that distinguishes Bitcoin from "other currencies legal in Japan" presently. In this regard, it is more like gold, and local population may be interested in that. Anyway, you still should somehow explain why the Japanese government made Bitcoin legal. What is your take on this?