The police worked with internet registers and brand protection associations to find the sites and close them.
The operation, dubbed Ashiko, has managed to close down 5,500 websites selling clothes, sunglasses, jewellery and other luxury products, according to the BBC.
Police said people should use their common sense when visiting web sites that appeared to offer bargains. Such sites often don’t bother too particularly with grammar and spelling.
People should also check whether or not there is a contact address, and should be careful they’re antivirus software is up to date, as the sites often contain malware or computer viruses.
People are also being warned not to clink on links in emails and beware of web sites that don’t start with the https prefix.