There are lots of large cities that are east of 105° longitude and north of 15° latitude, but some of the most well known are Tokyo and Beijing.
Tokyo is the capital of Japan, and Beijing is the capital of China. Both of them are very big cities, with Tokyo actually being the biggest city in the world. They are cities that have huge economic and political power, not just in their respective countries and Asia, but on a global scale. Tokyo and Beijing are modern cities that are highly developed in every aspect, but they differ a lot from one another which is mainly because of the different cultures in the countries and different stile of functioning.