The following countries or regions are sometimes considered part of East Asia. Political point of view is an important factor contributing to one's views on how the following countries or regions should be categorized:
More than 1,500 million people, or about 40 per cent of all Asians and a quarter of all the people in the world, live in East Asia. The region is one of the world's most crowded places. The population density of East Asia, 230 per km˛, is over five times the world average.
The history of East Asia, as well as parts of Southeast Asia, is heavily influenced by and intertwined with that of China. For example, all East Asian countries have used Chinese characters at some point in their history. The regions of China, Japan, and Korea, which have historically related writing systems, are sometimes collectively referred to as CJK (or CJKV with the inclusion of Vietnam).
NortheastAsia economic development is quite unbalanced, even in countries with high economic development level such as Japan and Korea, their domestic economic developing is quite unbalanced, East sea coasts of both countries are all economic backward regions.
The northeast area has much latent superiority to speed up the economic development, such as, the industrialization and the urbanized level is higher, the industrial foundation is more abundant, the education and the technical level is more developed, has the natural condition for the development of modern agriculture.
Although the present NortheastAsia area is still with difficulty to realize the personnel free intercourse and the labor force unrestricted flow, strengthen of the region service cooperation and gradual relax to the labor force mobile limit, is one basic direction of the region economic cooperation.
However, future growth of gas utilization in Southeast Asia strongly depend on the development of the infrastructure for gas trade and new findings of gas reserves since a large share of the current gas reserves are already committed to the LNG markets, particularly in Japan, South Korea and Taiwan.
For countries in NortheastAsia, South Korea recently decided to start reconsidering building of new nuclear power plants; China will continue its program to equip coastal provinces, where the economies are continuing to grow rapidly, with nuclear power plants.
The recent experience of countries in Northeast and Southeast Asia in managing the complex relationships between economic growth, energy development and environmental protection is limited and certainly cannot be used to elaborate an efficient strategy in the pursuit of system sustainability.