There are Mercator projection maps with the Americas in the center and Japan on the left edge of the map.

Most maps, regardless of projection used, cut the world through the pacific because there’s barely any land. World maps centering the Americas cut through Central Asia, making them less practical for many applications.

All map projections try to flatten a curved surface. That only works with cuts and distortions. They are all trade-offs between conserving area, angles, shapes, distances. It’s impossible to to all of that.