Good thing is that Japan is really committed full support on crypto so it will just be a matter of time before FSA will approved it, might be even gave the go signal ahead of US SEC.
I am inclined to think that it may result in the SEC to be less tempted to approve an ETF because it will make Asia as a whole an even bigger player in the crypto industry, which is one of their main concerns and admittedly a big deal.
If we look at how Japan is taxing crypto currencies in the most ridiculous way, this ETF might be a convenient tool for large investors to avoid paying 55% in capital gains. In other words, there is an incentive to buy into this ETF.
What we don't know is whether or not the ETF Japan might be going to approve whenever they are ready, will be backed by Bitcoin or not. In case it isn't, there nothing to be excited about because we don't need more empty products.