Of course, the tools could have been made by some other Homo species, like Homo erectus but the dates are in concordance with the earliest known presence of our species in West Asia (dated arguably to maybe as early as 130,000 BP) and maybe South Asia too, where the first bladelets appear c. 105,000 BP. Even if not conclusive as of yet, the finding seems to add evidence to support an early out of Africa migration at the time of the Abbassia Pluvial, when the Sahara was green and transitable.
Update (Sep 11): I found a half-decent article from the blog Heritage of Japan that even includes a picture of some of the 20 artifacts. Most interestingly the artifacts have been re-dated to c. 70 Ka ago, a quite reasonable date for the arrival of the very first H. sapiens to the area. They are clearly not Acheulean (the technology of H. erectus) and could well belong to the flake industry tradition of our kin in Eastern Eurasia.
