They have a very advanced and large economy (fourth in the world by size). Their problem is labor shortage, due to being one of the oldest nation in the world.

They have a very advanced and large economy (fourth in the world by size). Their problem is labor shortage, due to being one of the oldest nation in the world. They've already outsourced a ton of work, because there just isn't enough working age people in Japan to do all the work of their export-centered economy. If anything, they need to attract workforce (immigrants), not more businesses.