This is a complete guide for Japan armor. It's taken directly from in-game screenshots and its meant to be used either along with coffee to ponder your strategic choices, or in game while shift+tabed into steam overlay for quick information on opponents armor in order to counter it.

You can find links to other nations in the footer of this guide. I welcome a healthy discussion on which units are the most bang for the buck, as well as general Japan armor discussion in comments bellow. Have a good war!