Chiba is a ward of Neo-Tokyo, across the Tokyo Bay from the main city.
Many places nominally peripheral to Tokyo, such as Tokyo Disney and Tokyo Narita international airport, are found in Chiba. Chiba is also well known - and infamous - for its elite state-of-the-art cybertechnology clinics, including black-market services.
Chiba is also the headquarters of Renraku Computer Systems and hometown of its famed former CEO, Inazo Aneki.