Why doesn’t Japan invade poor African countries?

In my opinion, I would be worse than a beast like Japan, investing so many troops, weapons, manpower, material resources, etc. I will directly immigrate to Africa on a large scale, engage in large-scale development, turn Africa into the most livable place on earth, and then become the master of Africa. Didn't Japan at that time grandly advocate the so-called "building a Greater East Asia Prosperity Sphere"? If we have technology and manpower, and all the resources invested in China's battlefield are invested in building Africa, I think Africa will not be so backward now. It is certain that African countries and people will resist, but as the subject said, military and economic backwardness should be easier to deal with than China at the time. If Japan had chosen to invade Africa first, I think everything would have been different. I think that in the eyes of Japan, China back then was just like how we look at Africa now. They felt that the military and economy were very backward and they could "annihilate China in three months", so they invaded China. Japan is short of resources and suffers from frequent earthquakes, so it is always thinking about obtaining the resources needed for survival through aggression. Africa is not a place lacking in resources. Instead, it is the birthplace of mankind. It is rich in various resources. It is precisely because you can live a good life casually that Africans have developed a lazy habit. Although Africa has resources, they only plunder and not build. At that time, Africa's infrastructure, roads, etc. were not as complete as China's. Instead of going all the way to Africa to build, it was better to go to China next door to plunder. If Japan had not been defeated, it might have invaded other countries, including of course Africa. After all, they would even dare to attack the United States.