Because at least in Night City, multiple giant corporations are competing with each other, giving those at the bottom a chance to catch their breath amidst the slaughter. However, in today's Chiba, there is only one giant corporation named Huang Ban.
This city is three-dimensional.
The towering black skyscrapers completely block out all sunlight, combined with countless hovercars weaving between the buildings, no natural light can reach the building's base, leaving it in perpetual darkness, illuminated only by cheap and overused neon lights.
Additionally, after 1994, the global economy collapsed, and as one of the most developed countries at the time, Japan welcomed a wave of refugees from across the world.
These tens of millions of refugees were irresponsibly dumped into Chiba by Japan's conquest and then left unchecked, eventually forming the world's largest slum.
Hundreds of thousands of people live in the hundred-square-kilometer city base.
