Actually, Eastern-style BDSM doesn't use safewords. And as someone who has practiced BDSM for nearly 2 decades, i find that way actually is better at weeding out the abusers that tend to be harbored by western BDSM. The idea of a safeword is starting to be used as a talisman to avoid responsibility and blame. Jay Wiseman wrote about the problem more than a decade ago, and it still hasn't been fixed.
By talisman, i mean that "did you safeword" has become the BDSM equivalent of "What were you wearing" for rape. "Oh, if you didn't enjoy it, why didn't you safeword?" Things like subspace, endorphin rushes, etc, cause an altered headspace where one CANNOT safeword. And many abusers cause it for the very reason of allowing them to do things like violate limits.
Eastern style BDSM, by nature of lacking that safeword, puts all the responsibility for safety on the dominant. They have to know their sub's triggers, body language, potential mental issues, likes and limits. There's no way of avoiding the responsibility with "oh, if i go too far, the safeword will happen." And the sub has increased responsibility for communication and telling the dominant everything.
In fact, this is a fine, loving example of eastern-style BDSM. Notice how she checks multiple times. Keeps offering outs. Keeps reassuring she can leave any time. When there's confusion, makes it blunt that it is BDSM. Only goes forward when allowed, past the initial rope panties.
This is a great tidbit of information. At least now I know why I've never seen any mention or use of safewords in Eastern mangas. (Kinda weird considering that I am born and raised Asian and even had actual, albeit minimal, contact with BDSM)
