There are certain angles, actions, and poses JRs can't take before it's considered pornographic, my guess is that Sasha hits all of them as if she's going down the list herself.
And slips/wardrobe malfunctions? You'd probably have a harder time finding a full minute where her goods aren't on display at some point.
Oh and this probably takes part in the past or in an Alternate Universe because I'm fairly certain that Japan pretty much destroyed the openly perverted JR idol DVD/Blu-ray/Photo-set industry when they hosted the olympics, so anything close to what Sasha is doing is almost fully underground or VERY tame/restritcted.
That said, knowing what Sasha is up to makes ME want to drown.