From the current list I can make out there are 25 JPN servers, 19 NA servers and 6 EU servers. Let's for fun's sake divide the number people in said regions by the number of servers:
JPN: 1 server per 5 million population
NA: 1 server per 28 million population
EU: 1 server per 123 million population

So Europe has almost 25 times fewer servers per capita than Japan and North America has over 5 times fewer servers per capita than Japan