We live in times where VHS tapes are quite unpopular and idle, so of course a premise which focuses on a cursed VHS tape would not work anymore, as in scaring people who spend most of their times on their tablets, IPhones, Blu-Ray, Netflix etc. Then, through an insane worshiper, the curse reaches Internet, whereby Sadako's ghost searches from a supernaturally gifted host to occupy and live once again. This greatest plot ever thought to upgrade the "Ringu" premise is, unfortunately, misused in "Sadako 3D", which is surprising coming from the J-Horror genre full of such great films, "Ringu" itself included, that left Hollywood jealous and out of attention, forcing them to remake several Asian films.
"Sadako 3D" has a plausible plot for this high-tech times, but is visually absurd and spends most of its length focusing more on action and abusing of 3D effects, forgetting the new kind of thriller the story should provide. Basically, it turns out too much violent and noisy for a "Ringu" (or a J-Horror) film. Hopefully, this is an isolated case and won't happen to upcoming films, otherwise, be sure Japanese horror itself is cursed.