Gedemon, I've tested seven games as Japan (two of which the AI played) and it's not looking good. I think the landmass is going to need to be increased. It's a 1.5 city island in Civ6. There's not enough room for any decent amount of districts, let alone improvements or wonders. Even if you put luxuries and resources on 80% of the tiles, Japan falls behind extremely fast. Not being able to expand, until almost medieval era, and limited to pretty much 1 non-useless city hurts really bad when there is no room to build tall. I'll do England next.