So that people can stay there and be sheltered./
I was excited to see this question because I, myself, just learned this the other day. The answer you are looking for is Tokyo.
Three important resources include energy, mineral, and timber.
Energy (natural gas, crude oil, crude bitumen (oil sands) and coal)
Mineral (gold-silver, nickel-copper, copper-zinc, lead-zinc, iron, molybdenum, uranium, potash and diamonds)
Natural resources are important for supporting the economy, and supporting the necessity of the citizens.
Good luck on your assignment!
Mobutu enriched himself by misusing borrowed money. (Gradpoint)