Question

The four "home" islands of Japan and the 2,456 smaller Japanese islands have made the political and economic development for the country difficult due to

Answer 1

Due to..... the lack of closeness between all parts of the country.

This is because if there are people living on some of the 2,456 smaller Japanese islands, and even spread out amongst the four main Japanese islands, it is harder to execute changes for the political and economic development of the overall country.

Hope this helps! :)