JASDAQ (Japanese: ジャスダック, Hepburn: Jasudakku), formerly the JASDAQ Securities Exchange (ジャスダック証券取引所, Jasudakku Shōken Torihikijo) is one of the sections of the Tokyo Stock Exchange.
This system was placed under the management of a private company, Japan OTC Securities (日本店頭証券, Nippon Tentō Shōken) in 1976.
In 2004, JASDAQ received a permit from the Prime Minister to reorganize as a securities exchange.
On April 1, 2010, the Osaka Securities Exchange acquired the JASDAQ Securities Exchange, and merged it with OSE's NEO and Nippon New Market-Hercules markets to form the "new" JASDAQ market.
The exchange has pre-market sessions from 08:00am to 09:00am and normal trading sessions from 09:00am to 03:00pm on all days of the week except Saturdays, Sundays and holidays declared by the Exchange in advance.