While business chances typically arise from deregulation, some entrepreneurs find golden opportunities when regulations tighten.

For Gen Nakanishi, president of Tokyo-based gominet.com, the enforcement of the revised Wastes Disposal and Public Cleaning Law in April came as a blessing.

The law, revised in a bid to curb illegal dumping, holds corporate entities responsible to the final stage of the waste-disposal cycle for any waste they generate. If a company's waste is dumped illegally, even by its subcontractors, it can be held liable.