The Securities and Exchange Surveillance Commission will undergo a revamp in July in which its inspectors will be assigned to one of three groups of brokerages -- major domestic brokerages, Internet transactions and smaller domestic brokerages, and foreign securities houses.

"At the moment, inspectors deal with all kinds of situations," SESC head Takeo Takahashi said. "But the need for expertise is rising . . . and we plan to establish an inspection system that is separated according to business groups."

Takahashi said the SESC will later set up a fourth group of inspectors whose main task will be to deal swiftly with incidents.

The SESC will tighten surveillance by increasing the frequency of inspections on brokerages, he said.

"At the moment, it is once every three years," he said, "but I want to make this at least every year and a half."