Hidden camera voyeur videos appear to be popular enough in Japan to justify several video series dedicated to the niche. A popular theme is the chiropractor/massage office hidden cam, as evidenced by titles such as Body Work, Chikotsu Hidden Cam, and the oddly mistranslated Bone Crasher, where cute japanese girls are worked over by horny medical practitioners.

Sample clips: Bone Crasher 5, Body Work 4