Location from One-Punch Man by ONE & Yusuke Murata
The Hero Association's base city — where the headquarters is located and where most S-Class heroes nominally reside (when they're not ignoring summons).
A-City is the political center of the hero world. The Hero Association HQ dominates the skyline, and the city benefits from being the most-protected urban center on Earth. It was famously almost destroyed by Boros's alien ship before Saitama intervened. The city's reconstruction (funded by Metal Knight) was suspiciously fast and high-tech.
A large, modern metropolis with the Hero Association's massive headquarters building at its center. The city is well-maintained and heavily protected — being the Association's home city means monster attacks are responded to quickly. High-rise buildings, commercial districts, and hero-themed merchandise everywhere.
Also known as: A-City