Nikujaga is one of the traditional Japanese family meals. It is highly nutritious as we can consume vegetables and meat in a balanced way.
It can be eaten straight after it's cooked, but leaving it for an hour or so can make it even tastier as the flavor soaks through. After leaving it for an hour, reheat before eating.
The broth is important for good taste. The taste is much better if you use broth for stew and soup instead of water.