What are the internal and external factors that shaped japan's civilization?

Japan is one of the most developed nations of the world and it's civilization was seen and admired by the other nations of the world since long. There were many factors that formed this civilization like the geography of Japan which is surrounded by the four islands and these are covered by mountains having high dense forests, and receive rainfall which help in taking up agriculture.

The scenic beauty also adds up to civilization. It's good relations with other countries helps to bring cultural diversity and development in trade also shaped up the civilization.

a politically correct answer.

northernmost part (disputed, administered) - near indira col, siachen glacier - 35.674520°n 76.845245°e

northernmost part (disputed, claimed) - dafdar near beyik pass - 37°24′00″n 75°24′00″e

northernmost part (undisputed) - near dharwas, chambal district - 33.24902°n 76.82704°e

southernmost part (mainland) - cape comorin - 8.06890°n 77.55230°e

southernmost part - indira point in the nicobar islands - 6.74678°n 93.84260°e

distance between:  

1 & 4 - 3070 km

1 & 5 - 3654 km

2 & 4 - 3269 km

2 & 5 - 3885 km

3 & 4 - 2801 km

3 & 5 - 3430 km

explanation:

c, they united with once