How did japan's geography affect it's economy and culture?

Japan is a hard place to live as only 15% of all land is suitable for farming. This is because the land is not flat enough. There are many ever-present menaces, including volcanoes, earthquakes, tidal waves, and hurricanes. Very few natural fuels can be found; there is no coal or oil. The climate is mild and rainy. It is separated from the mainland, and as a result, fewer people came to live there than other areas.

They weaken the south vietnamese army.