Hoshizora
Literally "starry sky", this zone consisting of a few large islands (along with a few small ones) is an interesting juxtaposition of ancient structures and shrines celebrating Shenism and extremely modern and advanced technology (Lumitek) generally rejected by followers of Shenism. While the two sects of this religion disagree in principle, they coexist in peace and do trade with one another as needed. Zone L contains settlements and towns (and indeed a city) with the most advanced technology (Lumitek/Lumis) in the world. Side note: Lumitek is said to be useless outside the radius of a Lumitek Reactor’s influence, all of which are within Hoshizora.