The Japan Securities Dealers Association will begin releasing data on stock short selling on the Jasdaq over-the-counter market in a bid to improve its transparency.
The March data will be available from April 22, and new data will be posted on Jasdaq's Web site on the 20th of each month, the association said.
The Tokyo Stock Exchange and Osaka Securities Exchange have decided to take similar steps.
The move follows the government's tightening of regulations on short selling in early March. The government said short selling was one of the factors accelerating a fall in stock prices.