The PlayStation Vita appears to be struggling to build an audience in Japan. In its second week on the market, the system sold 72,479 units, according to the Media Create numbers -- outsold by the 3DS, PSP, Wii, and PS3. The software top 20 shows why the 3DS is doing so well right now (it sold 482,200 units): three of the top five games are 3DS releases, including Mario Kart 7 (#1), Super Mario 3D Land (#3), and Monster Hunter Tri-G (#4).

In fact, no Vita games at all appear in the top 20 -- though that makes sense, given the relatively lacking hardware sales and the availability of all retail games on PSN at lower prices.