Miners complained that the police were unfairly restricting their traditional rights and in any case that the police had no responsibility for enforcing the civil law.
United States officials contend that Japan unfairly restricts imports and hinders competition from outside firms in areas such as banking.
The networks have argued that the rules unfairly restrict their business and need to be changed.
The investigation ordered today would look at four ways in which Administration officials believe that China unfairly restricts imports.
Farmers complain that the government is unfairly restricting access while businesses and housing divisions are given freer access.
That, Washington has complained, could "unfairly restrict" American access.
A preliminary judgment by the trade organization in March largely supported Washington's view that the preference unfairly restricts American companies' access.
The groups argue that many of the bills would unfairly restrict e-mail marketing and put electronic commerce at a disadvantage.
Washington complains that the Koreans unfairly restrict beef imports.
But cable companies complain that such a rule would unfairly restrict their capacity to carry more varied programming.