The Tokyo Stock Exchange plans to refund the difference between the fees it charges brokerages for real-time market data for their Internet-based clients and the cost of running the system, commencing this fiscal year, TSE officials said Friday.

The exchange spent a total of 3.97 billion yen in the year through March 31 on maintaining the service, while charging brokerages 4.5 billion yen, a difference of around 500 million yen, the officials said.

"The net income from the real-time information system is expected to total 2.1 billion yen in the five-year period from the current fiscal year, so we will reimburse 500 million yen to 600 million yen each year through cutbacks in the per-customer fee (for the service)," an official at the TSE's information service department said.