Tokyo, Japan is a former city that exists within the Old World. The character Eggurai was born here, along with Shirito's ancestors (possibly his parents). The city was once alive and bustling with over 30,000,000 people living in the metropolitan area. After the demise of the nation, Tokyo later died with many of its inhabitants becoming Faded and psychos or fleeing to Crestfall.
Characters from Tokyo
Eggurai (born in Tokyo, fled to Crestfall during his adolescence)
Marshal Shirito's parents/relatives (mentioned that his parents are Japanese, and they once lived there)