I wasn't sure where to post this, since there's so many different Japanese Charts-related topics, but here we go:
It's been reported that, after the launch of their digital album chart, Oricon will be launching a digital singles chart later this year - just in time! No news whatsoever on streaming.
Meanwhile, Billboard Japan has started it owns separate download and streaming charts. I'll still be looking forward to the Oricon one, though, because at least it will be OFFICIAL and we'll be getting some figures.