Qpon sells discount coupon from such as restaurants, spas and hotels of just one shop a day in each area in principal. If a certain number of buyers gather, they will get the coupon. At first it starts only for Tokyo area.
The marketing method to gather large number of customers by setting limited period for sale with drastic discount is called flash marketing, which is represented by Groupon in the US. In Japan, there increases the services such as piku of Piku Media and KAUPON of Kiramex.