London

London (ロンドン, Rondon)  is a city in southern England and the capital city of the United Kingdom. It is the main setting of the Jujutsu Shori series.

Front London
Front London simply refers to the original London inhabited by everyday humans. In the victorian era, London is the global leader of industrial advancements. London retains its classical architecture while also reflecting the technological advancements of the city.

As countrymen move into the city looking for work, London has received a sudden spike in population. Wealthy businessmen abused this to decrease wages and take advantage of their employees. This results in the spark that would ignite the Industrial Revolution. At this time, London is the center of the entire world.

Reverse London
Reverse London is a hidden domain that overlaps Front London using a sophisticated barrier. The barrier hides Reverse London from being perceived by non-sorcerers. Reverse London is an exact reflection of the city, effectively making it a mirror realm to Front London.

The environments within Reverse London are projections of the domain created by cursed energy, so any damage that occurs does not affect Front London. This would normally require such a high degree of cursed energy the domain would be inefficient to maintain. However, Lord Death has reverted to his natural state without a vessel. This has allowed his very essence to become a part of the barrier, allowing Lord Death to maintain the integrity of Reverse London at all times.

The barrier was designed by Mephisto Pheles and was embedded with a complex net of binding vows. This allows the barrier to accomplishing several things. It automatically pulls through cursed spirits to Reverse London, which prevents them from being able to curse normal humans and grow in strength. Sorcerers can only enter and exit the barrier using set access points they can activate using coins imbued with Lord Death's residuals.

In the rare case a curse goes unattended in Reverse London for too long it can pass back through the barrier. If a high appearance of curses results in a paranormal hotspot appears in Front London, the same area mirrored in Reverse London will be distorted. This is a sign for the WB to dispatch their sorcerers to investigate the site in Front London.

Jujutsu Academy

 * Main Article: ''Reverse London Jujutsu Academy

At the core of Reverse London is its own place of inception. What started as a simple research outpost developed into the perfect headquarters for recruiting and training sorcerers. The idea was to cultivate a powerful group of sorcerers capable of protecting England. It has grown exponentially and eventually needed to be hidden by a barrier. This desire to protect the academy spawned into what eventually became the complex mirror world that is Reverse London.

At present, the academy is a base for exorcist operatives active in Europe. It trains young sorcerers and deploys them on missions within Reverse London to preserve their lives and hone their skills. Generally, only seasoned exorcists are sent to Front London and beyond. Students and faculty alike live in Reverse London. Students generally live in dorms at the school while exorcists are residents of Reverse London's city.

Districts
London is divided into seven boroughs: the City of London, Lambeth, The Strand, Westminster, Southwark, Whitechapel, and the River Thames. Each borough offers different culture with a single commonality.