Impel Down

Biodata

Background / History

Impel Down had been completed for only half a month when Captain Gaston Figo arrived as one of its first volunteer jailers. His initial one-year appointment placed him in command of a twenty-person brigade responsible for much of Level 1. 1

The prison was established in the Calm Belt and built with six descending detention levels. At first, the top three levels were each managed by a Captain; Levels 4–5 fell under the Jailer Chief and Vice Jailer Chief, while Levels 5–6 were overseen by the Warden and Vice Warden. No Director existed during the prison's first year. 3

After Laughing Jellal's capture and the Celestial Dragons' concern over prison labor, the World Government separated Impel Down from Marine Headquarters. It became the Government's third directly administered institution, and the Director position was created. Figo returned after a brief absence as the first Director. 26 29

Under Figo's tenure, Impel Down expanded beyond a purely punitive institution. He established Level 4.5 as a supervised study-and-reform zone for sympathetic or wrongly convicted prisoners, then later oversaw the creation of additional Impel Downs and the larger prison kingdom centered around them. 52 107

Structure

Levels 0–6

Prison Kingdom

The later reorganization designated the original facility as Impel Down No. 1. Three additional prisons were built roughly 50 miles apart in a four-corner formation, connected to a larger central complex by passages. 107

• Impel Down No. 1 — houses the most heinous criminals and retains the harshest environment and treatment. 132
• Impel Downs No. 2–4 — separate prisoners by the severity of their crimes. 107 132
• Impel Down No. 4 — known as the “Family-Style Prison”; detainees remain confined but receive ample supplies and living conditions comparable to those of jailers. 132
• Central complex — serves as a Marine science and training center rather than a prison. 107

Security and Operations

• Impel Down is located beneath the sea in the Calm Belt. Its outer shell contains Seastone, limiting the size of nearby Sea Kings. 10
• Prisoners are restrained with chains; Devil Fruit users may be fitted with Seastone cuffs. 52
• The prison uses monitoring Den Den Mushi and dedicated jailer passages between levels. 31 39
• Early security relied partly on the Calm Belt's isolation. Three Fish-Men once infiltrated by stowing away on a supply ship, exposing a major vulnerability and prompting new security regulations. 6
• Sea Kings once served as a defensive line around the prison, though Figo's habit of hunting them for food reduced their numbers. 8
• Escapees who remain within the prison are not considered to have fully escaped; this distinction was demonstrated when four Level 5 prisoners were recaptured before reaching the outside sea. 31

Detention Practices

Baptism

New arrivals are stripped, suspended by hooks, and immersed in boiling water. Officially, the process eliminates bacteria and toxins; in practice, it is a brutal form of torture. 1

• The procedure is conducted in the Baptism Room on Level 0. 1 2
• Strong prisoners may endure the immersion unusually well, as demonstrated by Doham's seven-minute ordeal. 7
• Giant prisoners cannot be immersed in a normal cauldron and are instead hosed with boiling water before receiving prison uniforms. 8

Punishment and Control

The early prison routinely subjected detainees to starvation, beatings, whipping, and harsher punishments than the initial baptism. 1 3

• Level 5 and 6 prisoners are passed food only within reach of their cell bars due to the danger they pose. 30
• Figo sometimes deliberately released prisoners inside the facility before recapturing them, treating the incidents as punishment and testing the prison's limits. 32
• Under Figo, selected prisoners were instead given access to Level 4.5, food, labor, books, and defined sentences. 52 90

Personnel and Governance

• Gaston Figo — one of Impel Down's first jailers; rose from Level 1 Captain to Jailer Chief, Vice Warden, Director, and eventually King of Impel Down. 1 6 9 29 107
• Kinch — former Jailer Chief who later became Warden and Deputy Director; Figo entrusted him with the Director's seat during later absences. 6 9 59
• Seazer — Vice Warden during the early years; supported Figo's advancement and later became Warden. 6 8
• Rup Rado — World Government-appointed Deputy Director sent with twenty jailers and direct reporting lines to the Five Elders. 32
• Aokiji — appointed Deputy Director during Figo's directorship and consulted on the creation of Level 4.5. 52
• Sapphire — manager and librarian of Level 4.5. 52 90

Notable Prisoners

• Doham — SR3 Great Pirate imprisoned on Level 5; later led an unsuccessful four-person escape attempt. 7 30 31
• Laughing Jellal — 640-million-Berry Great Pirate confined after Figo became Director; later assigned work connected to Level 4.5's development. 29 52
• Sister Galmero — human trafficker imprisoned on Level 5; helped expose Doham's escape attempt. 29 30
• Raul — former Marine Admiral captured by Figo and confined in Impel Down. 38
• Rebrus and the Hell Pirates — captured and sent to Level 6, further solidifying the prison's reputation as a forbidden destination for pirates. 52 53
• Rocks — later held in Impel Down No. 4. 132

Reputation

Impel Down became known across the seas as a prison from which pirates feared capture more than death. Its reputation grew sharply after Figo's defeat of the Hell Pirates, with pirates treating the facility as a forbidden ground. 52

By the time Monkey D. Garp first visited, Marine personnel regarded it as the world's greatest prison and assumed even powerful captives would be safely contained there. 59