They say that money is some that goes by. But they never think about it in different way which at some times in history was done by very few people. And that changed the world. It did changed the world but that changed their era's economy. One of that happened in Japan after the second war ended. That economic growth was a miracle. Japanese people worked harder than any other in the world.
Japanese knew that working hard can make a lot of money. And that is too
Obviously, money and more broadly economic sources are as much responsible for wars as the political reasons - no matter how much we deny that.
And that is true even in contemporary times - for example look at Iraq war. USA attacked Iraq just for its oil.
The Japanese are just a small example of the exception.
But Japan was already preparing for war, and they used that momentum to better the economy, post world war II.