J-City

J-City (J市 J Shi) is a large seaside city situated on the Earth.

There are at least 15 heroes living in this city.^[1]

Locations

Evacuation Shelter

The Evacuation Shelter is a public shelter located in J-City, built by the Hero Association for use in the event of an attack by high-level Mysterious Beings. It was used when the Deep Sea King attacked, although it was broken open. Externally, it consists of a giant dome with circular windows lined around the top.

Smelly Lid Prison

Smelly Lid Prison is a high-security prison that holds some of the world's most dangerous criminals. It is located on a small island just off the coast of J-City.^[2] The S-Class Hero, Puri-Puri Prisoner, is imprisoned in this facility and regularly breaks out to do hero work.

Junkyard

There is also a Junkyard located on the same island as the prison, which is where the monster TV Junkyard Monster was created.

Inhabitants

Heroes

Number of Heroes by Class:^[1]^[3]

S-Class: 1
A-Class: 1
B-Class: 3
C-Class: 11

Known

Monsters

Seafolk (Extinct)
- Messenger of the Seafolk (Deceased)
- Deep Sea King (Deceased)
- Urn Eel (Deceased)
TV Junkyard Monster (Deceased)

Civilians

NEET evacuee

Plot

Hero Association Saga

Sea Monster Arc

J-City is invaded by the Seafolk. The A-Class hero Stinger is able to fend most of them off until the Sea King arrives.^[4] The Sea King rampages through the city, causing chaos and defeating the heroes Lightning Max, Puri-Puri Prisoner, Bunbun Man, All Back-Man, Jet Nice Guy, Sneck, Mumen Rider, and Genos. Before finally being stopped by Saitama.^[5]