Of the latest number, 2,871 cases involved smartphones and 610 used hidden, compact cameras. In Osaka Prefecture, the number more than tripled to 257 in 2020 from 78 in 2010.

The cameras are often hidden in devices like hair dryers ... allowing users to pay for full videos or watch 30-second clips for free. The men reportedly posted 803 videos and evaded the law ...

Spy cameras disguised as clothes hooks are for sale on Amazon, despite the firm being sued over the gadgets. One clothes hook camera listing seen by the BBC features a picture of the device ...