Pokemon Go has pushed games giant Nintendo's share price up 86 per cent in just over one week.
The firm's share price surged by 10 per cent on Friday - setting a record in daily trading for an individual stock on the Tokyo exchange.
The game has so far been launched in the US, Germany, Australia and New Zealand - and officially became available in the UK yesterday, where it shot straight to the top of the app charts.
And the developer behind the smash-hit smartphone game is aiming to roll the app out in 200 markets - and soon. Niantic's chief executive John Hanke said: "Why limit it?"
While Hanke did not give any details on a timetable for further launches, he confirmed that the game would soon be coming to Japan, and also said he expects to launch Pokemon Go in South Korea, where Google's mapping functions are restricted due to security issues with North Korea. Niantic is working on that issue, Hanke said: "There are solutions to that."
And with regard to China, where the internet is heavily monitored by the government, Hanke said releasing the game would be possible but regulations would have to be considered.