Tokyo, obviously..
Northwestern Europe has the densest population.
japan
The four regions with the densest population concentrations are East Asia, South Asia, Southeast Asia, and Western Europe. These regions have high population densities due to factors such as urbanization, fertile land, and economic opportunities.
Asia is the continent with the densest population, with countries like China and India having some of the highest population densities in the world.
The city with the densest population is Auckland.
if you mean which country, it would be China, if you mean city that would be Mexico City
what is the population of japan in 2009
The population density is 200 people per square mile
In 2014, the population of Japan was estimated at 126,434,964.
The population of CGC Japan is 334.
Japan Post's population is 2,006.
Japan Tobacco's population is 2,011.