Trading volume on Nasdaq Japan, the domestic version of the technology-laden U.S. Nasdaq market, topped 10 million shares in February for the first time since its launch in June, the Osaka Securities Exchange said Thursday.

The 10.94 million shares traded in the month was about triple the January number, the exchange said.

The value of February transactions was 100.3 billion yen, 2.6 times that in the preceding month, it said.

Softbank group unit Softbank Investment Corp. accounted for half the combined transaction value.

OSE officials traced the upsurge in trading volume to the debuts of four new companies on the bourse in February, including Precision System Science.

Trading volume on the OSE's first section in February also soared, rising 19.2 percent to 1.249 billion shares. Officials laid the increase to banks and nonfinancial companies unloading their cross-shareholdings, the officials said.

The value of transactions was 1.778 trillion yen, up 11.7 percent.

Nasdaq Japan was founded by Softbank and the U.S. National Association of Securities Dealers, the parent of the U.S. Nasdaq market. Softbank and NASD each hold a 50 percent stake in Nasdaq Japan with paid-up capital of 600 million yen.

Nasdaq Japan is associated with the OSE and located in the exchange's premises. It competes with the Mothers market and the over-the-counter market to woo startup venture businesses.