Corrections
Why do figures about how full prisons are disagree with each other?
Because each is built on a different counting rule, and the rule usually travels separately from the number. Four official sources are compared here — not to produce a figure, but to show what any figure of this kind is actually measuring.
In short
Figures about how full a prison system is combine two separately constructed quantities: how many people are held, and how many places there are. Each depends on decisions that are usually recorded in a methodological note rather than in the headline — who counts as held, on what date or over what period, at what level of aggregation, and what a place is. Change any one and the figure changes without anything happening in any prison.
Why it exists
AnalysisThe subject attracts strong statements and weak evidence in roughly inverse proportion. A single number is easy to repeat and the qualifications attached to it are not, so the number circulates and the counting rule stays behind. The result is confident claims resting on measurements that were never designed to support them.
How it works
Start with the intergovernmental source, because it is explicit about its own limits. The Council of Europe Annual Penal Statistics collect data supplied by national prison administrations through an agreed questionnaire, with a stated reference date for the prison population. The report’s aim is comparable data, and it nonetheless warns in its own text that "any comparisons of the levels (in rates, ratios and percentages) shown by the countries according to different indicators are always problematic".
Now three national sources, each counting something different. Statistics Canada publishes average daily counts over a fiscal year for adults in provincial and territorial correctional programs. That is an average over a period, not a snapshot; it excludes federal custody, which covers sentences of two years or more; it aggregates ten provinces and three territories; and it counts adults, not youth.
Brazil’s penitentiary statistics report works differently again. Its published totals for the second half of 2024 use a snapshot date of 31 December 2024 and the category presos em cela física — people who, regardless of daytime release for work or study, sleep in the prison establishment. Home detention is tabulated separately and excluded from that category, so the figure is not the total number of people under penal custody. The report prints population, capacity of places and deficit of places, and does not print an occupancy percentage on its totals pages.
Aggregation level is the fourth variable, and it is set by who administers custody rather than by the statistician. Where prisons are administered by sub-national units — as in Germany, following the general rule of Article 83 of the Basic Law that the Länder execute federal laws in their own right — a national figure is an aggregation of separate systems and describes none of them individually.
And sometimes the honest answer is that there is no figure. This platform publishes no detention-capacity statistic for Japan. The Ministry of Justice page that establishes the national administration of penal institutions carries no such figure, and the official prison numbers are released in linked spreadsheet tables and a large annual publication that could not be verified to the standard the other country pages meet. The claim was deferred rather than approximated.
Common misconceptions
Widely held beliefs that do not match how the system actually operates.
Common belief: A prison population figure is a straightforward count.
In practice: It is a count of a defined category. Brazil’s published total counts people who sleep in the establishment and excludes home detention, which is tabulated separately; Canada’s provincial figures exclude federal custody entirely.
Common belief: International statistics exist so that countries can be compared.
In practice: The Council of Europe report states its aim is comparable data and warns in the same document that comparisons of levels between countries according to different indicators are always problematic.
Common belief: If a report gives population and capacity, it gives an occupancy rate.
In practice: Not necessarily. The Brazilian report prints population, capacity and deficit but no occupancy percentage on its totals pages, so a rate taken from it is a derivation by whoever calculated it.
Common belief: A national figure tells you what an individual prison is like.
In practice: It does not, and where custody is administered sub-nationally it does not describe any of the constituent systems either. Facility-level conditions require facility-level evidence.
Common belief: Where no figure is published, an estimate is better than nothing.
In practice: An approximation presented alongside verified figures is indistinguishable from them to a reader. Stating that a figure was not verified — as this platform does for Japanese detention capacity — carries information; an estimate would destroy it.
How this varies between jurisdictions
A required section on every guide. Arrangements differ between countries, and we say how.
Four official sources, four counting rules.
- Intergovernmental collection with a stated reference date, warning against comparison of levels — Council of Europe SPACE I.
- Average daily counts over a fiscal year, sub-national only, adults only — Statistics Canada.
- Single-day snapshot of a named custody category, with home detention tabulated separately and no printed occupancy rate — Brazil, SISDEPEN.
- No verified capacity figure at all, stated as such rather than estimated — Japan.
Rights and accountability
AnalysisMeasurement discipline is an accountability question, not a statistical nicety. Conditions in closed institutions are contested precisely because the people inside cannot readily be seen or heard, and a figure that is overstated is as damaging to that argument as one that is understated — both give whoever disagrees a reason to dismiss the whole account.
AnalysisThe practical consequence for a reader is a habit rather than a fact: when a figure of this kind appears, find the counting definition before deciding what it shows. If the definition is not available, the figure is not usable for the claim it is being made to support.
What we could not establish
- This page is about how figures of this kind are constructed. It deliberately states no cross-country comparison, because the intergovernmental source used here warns in its own text against exactly that.
- The platform holds no verified capacity statistic for several countries, including Japan. Those absences are stated rather than estimated.
Where to go next
Related: who runs prisons, what remand detention is, and why justice systems need oversight.
Related topics
- Is there one prison system in a country?
Frequently not. Custody is split by level of government, by sentence length, or by both — and where it is split, a national prison figure is an aggregation of separate systems rather than a measurement of one.
- Are the people in prison all serving sentences?
No — and in one measured system, most of those in provincial custody were not. Remand is detention before conviction or sentence, which makes it a different thing from punishment despite looking identical from inside.
- Why does a society need a separate system for what happens after sentencing?
Because a sentence is a decision that still has to be carried out, by someone other than the court that made it, over a period of time. Two statutes state the purpose of that work expressly — and they state it differently.
Sources
Prison Populations — SPACE I 2024 (Council of Europe Annual Penal Statistics), PC-CP (2024) 5
Council of Europe / University of Lausanne (Marcelo F. Aebi and Edoardo Cocco) · International organisation · 2024-12-15 · link verified 2026-07-25
Strasbourg, 15 December 2024, updated 24 September 2025. An international (Council of Europe) source: data are supplied by national prison administrations to the University of Lausanne research team via a questionnaire agreed by the Council for Penological Co-operation. Reference date for prison population is 31 January 2024; country population figures are as at 1 January 2024. Figures extracted directly from the report PDF. Supports, for GERMANY: Table 3 — total inmates including pre-trial detainees 59,413, rate 71.2 per 100,000, adjusted 55,916 and 67.0; Table 16 — capacity 72,258 and density 82.2 per 100 places. Supports, for IRELAND: Table 3 — total inmates including pre-trial detainees 4,808, prison population rate 90.0 per 100,000, on a country population of 5,343,805; Table 16 — total capacity 4,560 and prison density 105.4 inmates per 100 places (i.e. above capacity at the national level). Supports, for the Northern/Western Europe batch (reference date 31 January 2024; Table 3 total inmates including pre-trial detainees / prison population rate per 100,000; Table 16 total capacity / prison density per 100 places): NETHERLANDS 9,683 / 54.0, capacity 10,344 / density 93.6; BELGIUM 12,041 / 101.8, capacity 10,680 / density 112.7; DENMARK 4,129 / 69.3, capacity 4,397 / density 93.9; NORWAY 3,004 / 54.1, capacity 3,616 / density 83.1; SWEDEN 9,748 / 92.4, capacity 9,295 / density 104.9; FINLAND 3,041 / 54.3, capacity 2,958 / density 102.8. These were extracted directly from the report PDF and cross-checked against the Ireland row already recorded here (column reading validated). The report states its aim is comparable data but warns that 'any comparisons of the levels (in rates, ratios and percentages) shown by the countries according to different indicators are always problematic'. It does NOT support any sub-national figure, nor any cross-country ranking.
Table 35-10-0154-01 — Average counts of adults in provincial and territorial correctional programs
Statistics Canada (www150.statcan.gc.ca) · Government publication · 2025 · link verified 2026-07-26
The official Statistics Canada data cube (English; French equally authoritative), read from the primary CSV download. Supports the corrections restricted claim: for fiscal year 2023/2024, the Provinces-and-Territories average daily count of adults in custody ('actual-in') was 25,349.8 — remand 19,334.5, sentenced 5,895.1, other 120.2. These are PROVINCIAL/TERRITORIAL counts only (they EXCLUDE federal custody, i.e. sentences of two years or more administered by Correctional Service Canada) and are average daily counts over the fiscal year, not a single-day snapshot. Supports no federal figure and no cross-country comparison.
Relatório do 2º Semestre de 2024 — Dados Estatísticos do Sistema Penitenciário (SISDEPEN, 17º ciclo)
SENAPPEN — Diretoria de Inteligência Penal (DIPEN), Ministério da Justiça e Segurança Pública · Government publication · 2025 · link verified 2026-07-25
The official penitentiary-statistics report, read from the primary PDF (extracted locally). Reference period July–December 2024, snapshot 31 December 2024, category 'presos em cela física' (people who, regardless of daytime release for work or study, 'dormem no estabelecimento prisional' — i.e. excluding prisão domiciliar / home detention, which the report tabulates separately). Supports: state-and-DF prison population Total = 670.265; capacity of places (capacidade de vagas) Total = 494.379; deficit of places (déficit de vagas) Total = 175.886. The report does NOT print an occupancy percentage on the totals pages — any rate is a derivation, not a quoted figure. Supports the single scoped detention-capacity claim on the corrections page; supports no comparison with any other country.
Penal Institutions (Prisons / Juvenile Prisons / Detention Houses)
Ministry of Justice of Japan, Correction Bureau (moj.go.jp) · Government publication · link verified 2026-07-25
The Ministry of Justice Correction Bureau's own English page, read directly. Supports: that 'in Japan, prisons, juvenile prisons and detention houses are collectively referred to as "penal institutions"'; and that 'these penal institutions are under the jurisdiction of the Ministry of Justice and are under the supervision of one of its internal departments, the Correction Bureau, and the eight regional correction headquarters which are the field offices'. Supports the NATIONAL administration of corrections by the Ministry of Justice — the structural point for the corrections page. It supports no figure about prison population, capacity or density; the pilot does not publish a Japanese detention-capacity statistic (see the model-findings document for why that claim was deferred).
Basic Law for the Federal Republic of Germany (Grundgesetz), English translation
Bundesministerium der Justiz / Bundesamt für Justiz (Gesetze im Internet) · Legislation · 1949-05-23 · link verified 2026-07-24
Translation by Professors Christian Tomuschat, David P. Currie, Donald P. Kommers and Raymond Kerr in cooperation with the Language Service of the German Bundestag; offered subject to stated conditions of use. The page states the text reflects amendments up to 22 March 2025. THE GERMAN TEXT IS AUTHORITATIVE and the translation may lag later amendments. Supports: Art. 20(1) federal state; Art. 30 (exercise of state powers is a matter for the Länder except as otherwise provided); Art. 70 (Länder legislate unless the Basic Law confers power on the Federation; exclusive vs concurrent); Art. 73(1) no. 10 (cooperation in criminal police matters; establishment of a Federal Criminal Police Office); Art. 74(1) no. 1 (concurrent legislation over criminal law and court organisation and procedure, EXCEPT the law on pre-trial detention); Art. 83 (Länder execute federal laws in their own right); Art. 87(1) (federal law may establish Federal Border Police authorities and central police offices); Art. 92 (judicial power vested in the Federal Constitutional Court, federal courts and the courts of the Länder); Art. 95(1) (the five federal supreme courts); Art. 96 (further federal courts); Art. 97 (judicial independence); Art. 35 (mutual legal and administrative assistance). Does NOT support any claim about how a particular Land organises its institutions. WAVE 19 ADDITION, read from the same official English translation page. NOTE ON NUMBERING, verified rather than assumed: in the current text the COMPOSITION of the Federal Constitutional Court is Article 93 and its JURISDICTION is Article 94 — the reverse of the allocation these two articles carried historically and of the numbering most secondary sources still cite. Supports Art. 93(5): a federal law regulates the organisation and procedure of the Court, and "the law may require that all other legal remedies be exhausted before a constitutional complaint may be filed and may provide for a separate proceeding to determine whether the complaint will be accepted for decision". Supports Art. 94(1) no. 2, ABSTRACT review: the Court rules "in the event of disagreements or doubts concerning the formal or substantive compatibility of federal law or Land law with this Basic Law or the compatibility of Land law with other federal law on application of the Federal Government, of a Land government or of one fourth of the Members of the Bundestag". Supports Art. 94(1) no. 4a, the INDIVIDUAL constitutional complaint: the Court rules "on constitutional complaints, which may be filed by any person alleging that one of his basic rights or one of his rights under paragraph (4) of Article 20 or under Article 33, 38, 101, 103 or 104 has been infringed by public authority". Supports Art. 94(1) no. 4b and 4c (municipal complaints and complaints by associations about non-recognition as political parties), and Art. 94(4), that decisions of the Court bind the constitutional organs. Supports Art. 100(1), CONCRETE review: "If a court concludes that a law on whose validity its decision depends is unconstitutional, the proceedings shall be stayed, and a decision shall be obtained from the Land court with jurisdiction over constitutional disputes where the constitution of a Land is held to be violated or from the Federal Constitutional Court where this Basic Law is held to be violated" — that is, the ordinary court must refer and may not itself disapply the statute. Supports Art. 100(3), that a Land constitutional court proposing to derogate from a decision of the Federal Constitutional Court must obtain a decision from it. The German text remains authoritative and the translation may lag later amendments. WAVE 20 ADDITION. Read from the same official English translation page and cross-checked against the German original at gesetze-im-internet.de, article by article. The Grundgesetz carries THREE distinct emergency regimes, and conflating them is the commonest error about it. Supports Grundgesetz Art. 35(1), (2) sentence 2: “(1) Alle Behörden des Bundes und der Länder leisten sich gegenseitig Rechts- und Amtshilfe. (2) [...] Zur Hilfe bei einer Naturkatastrophe oder bei einem besonders schweren Unglücksfall kann ein Land Polizeikräfte anderer Länder, Kräfte und Einrichtungen anderer Verwaltungen sowie des Bundesgrenzschutzes und der Streitkräfte anfordern.”. Supports Grundgesetz Art. 35(3): “(3) Gefährdet die Naturkatastrophe oder der Unglücksfall das Gebiet mehr als eines Landes, so kann die Bundesregierung, soweit es zur wirksamen Bekämpfung erforderlich ist, den Landesregierungen die Weisung erteilen, Polizeikräfte anderen Ländern zur Verfügung zu stellen, sowie Einheiten des Bundesgrenzschutzes und der Streitkräfte zur Unterstützung der Polizeikräfte einsetzen. Maßnahmen der Bundesregierung nach Satz 1 sind jederzeit auf Verlangen des Bundesrates, im übrigen unverzüglich nach Beseitigung der Gefahr aufzuheben.”. Supports Grundgesetz Art. 91(2): “(2) Ist das Land, in dem die Gefahr droht, nicht selbst zur Bekämpfung der Gefahr bereit oder in der Lage, so kann die Bundesregierung die Polizei in diesem Lande und die Polizeikräfte anderer Länder ihren Weisungen unterstellen sowie Einheiten des Bundesgrenzschutzes einsetzen. Die Anordnung ist nach Beseitigung der Gefahr, im übrigen jederzeit auf Verlangen des Bundesrates aufzuheben.”. Supports Grundgesetz Art. 87a(2), (4): “(2) Außer zur Verteidigung dürfen die Streitkräfte nur eingesetzt werden, soweit dieses Grundgesetz es ausdrücklich zuläßt. [...] (4) Zur Abwehr einer drohenden Gefahr für den Bestand oder die freiheitliche demokratische Grundordnung des Bundes oder eines Landes kann die Bundesregierung, wenn die Voraussetzungen des Artikels 91 Abs. 2 vorliegen und die Polizeikräfte sowie der Bundesgrenzschutz nicht ausreichen, Streitkräfte zur Unterstützung der Polizei und des Bundesgrenzschutzes beim Schutze von zivilen Objekten und bei der Bekämpfung organisierter und militärisch bewaffneter Aufständischer einsetzen. Der Einsatz von Streitkräften ist einzustellen, wenn der Bundestag oder der Bundesrat es verlangen.”. Supports Grundgesetz Art. 115a(1): “(1) Die Feststellung, daß das Bundesgebiet mit Waffengewalt angegriffen wird oder ein solcher Angriff unmittelbar droht (Verteidigungsfall), trifft der Bundestag mit Zustimmung des Bundesrates. Die Feststellung erfolgt auf Antrag der Bundesregierung und bedarf einer Mehrheit von zwei Dritteln der abgegebenen Stimmen, mindestens der Mehrheit der Mitglieder des Bundestages.”. Supports Grundgesetz Art. 115a(2), (3), (4): “(2) Erfordert die Lage unabweisbar ein sofortiges Handeln und stehen einem rechtzeitigen Zusammentritt des Bundestages unüberwindliche Hindernisse entgegen oder ist er nicht beschlußfähig, so trifft der Gemeinsame Ausschuß diese Feststellung mit einer Mehrheit von zwei Dritteln der abgegebenen Stimmen, mindestens der Mehrheit seiner Mitglieder. [...] (4) Wird das Bundesgebiet mit Waffengewalt angegriffen und sind die zuständigen Bundesorgane außerstande, sofort die Feststellung nach Absatz 1 Satz 1 zu treffen, so gilt diese Feststellung als getroffen und als zu dem Zeitpunkt verkündet, in dem der Angriff begonnen hat.”. Supports Grundgesetz Art. 115g: “Die verfassungsmäßige Stellung und die Erfüllung der verfassungsmäßigen Aufgaben des Bundesverfassungsgerichtes und seiner Richter dürfen nicht beeinträchtigt werden. Das Gesetz über das Bundesverfassungsgericht darf durch ein Gesetz des Gemeinsamen Ausschusses nur insoweit geändert werden, als dies auch nach Auffassung des Bundesverfassungsgerichtes zur Aufrechterhaltung der Funktionsfähigkeit des Gerichtes erforderlich ist. Bis zum Erlaß eines solchen Gesetzes kann das Bundesverfassungsgericht die zur Erhaltung der Arbeitsfähigkeit des Gerichtes erforderlichen Maßnahmen treffen.”. Supports Grundgesetz Art. 115l(1), (2): “(1) Der Bundestag kann jederzeit mit Zustimmung des Bundesrates Gesetze des Gemeinsamen Ausschusses aufheben. [...] (2) Der Bundestag kann mit Zustimmung des Bundesrates jederzeit durch einen vom Bundespräsidenten zu verkündenden Beschluß den Verteidigungsfall für beendet erklären. Der Bundesrat kann verlangen, daß der Bundestag hierüber beschließt. Der Verteidigungsfall ist unverzüglich für beendet zu erklären, wenn die Voraussetzungen für seine Feststellung nicht mehr gegeben sind.”. Supports Grundgesetz Art. 101: “(1) Ausnahmegerichte sind unzulässig. Niemand darf seinem gesetzlichen Richter entzogen werden. (2) Gerichte für besondere Sachgebiete können nur durch Gesetz errichtet werden.”. Supports Grundgesetz Art. 19(2) and Art. 79(3): “In keinem Falle darf ein Grundrecht in seinem Wesensgehalt angetastet werden. [Art. 19(2)] — Eine Änderung dieses Grundgesetzes, durch welche die Gliederung des Bundes in Länder, die grundsätzliche Mitwirkung der Länder bei der Gesetzgebung oder die in den Artikeln 1 und 20 niedergelegten Grundsätze berührt werden, ist unzulässig. [Art. 79(3)]”. Supports Grundgesetz Art. 115c(1), (3): “(1) Der Bund hat für den Verteidigungsfall das Recht der konkurrierenden Gesetzgebung auch auf den Sachgebieten, die zur Gesetzgebungszuständigkeit der Länder gehören. Diese Gesetze bedürfen der Zustimmung des Bundesrates. [...] (3) Soweit es zur Abwehr eines gegenwärtigen oder unmittelbar drohenden Angriffs erforderlich ist, kann für den Verteidigungsfall durch Bundesgesetz mit Zustimmung des Bundesrates die Verwaltung und das Finanzwesen des Bundes und der Länder abweichend von den Abschnitten VIII, VIIIa und X geregelt werden, wobei die Lebensfähigkeit der Länder, Gemeinden und Gemeindeverbände, insbesondere auch in finanzieller Hinsicht, zu wahren ist.”. These provisions support the STRUCTURE of German emergency law and nothing about its application. They record no instance of any regime being invoked, state no measure taken under one, and support no claim about any Land's own disaster-protection law or about any other country.WAVE 21 ADDITION. Read again from the same official English translation page and checked article by article against the authoritative German original at gesetze-im-internet.de/gg. Supports the LIMITATION architecture: Art. 19(1)-(2), “(1) Soweit nach diesem Grundgesetz ein Grundrecht durch Gesetz oder auf Grund eines Gesetzes eingeschränkt werden kann, muß das Gesetz allgemein und nicht nur für den Einzelfall gelten. Außerdem muß das Gesetz das Grundrecht unter Angabe des Artikels nennen. (2) In keinem Falle darf ein Grundrecht in seinem Wesensgehalt angetastet werden.”, and Art. 19(3)-(4) (basic rights apply to domestic legal persons so far as their nature permits; recourse to the courts where rights are violated by public authority, with the second sentence of Art. 10(2) expressly unaffected). Supports the RIGHTS-HOLDER finding, verified in the German text rather than the translation because the finding is about a word: Art. 8(1) “Alle Deutschen haben das Recht, sich ohne Anmeldung oder Erlaubnis friedlich und ohne Waffen zu versammeln”; Art. 9(1) “Alle Deutschen haben das Recht, Vereine und Gesellschaften zu bilden”; Art. 11(1) “Alle Deutschen genießen Freizügigkeit im ganzen Bundesgebiet”; Art. 12(1) “Alle Deutschen haben das Recht, Beruf, Arbeitsplatz und Ausbildungsstätte frei zu wählen” — against Art. 2(1) “Jeder hat das Recht auf die freie Entfaltung seiner Persönlichkeit”, Art. 3(1) “Alle Menschen sind vor dem Gesetz gleich”, and the two provisions that name no holder at all: Art. 10(1) “Das Briefgeheimnis sowie das Post- und Fernmeldegeheimnis sind unverletzlich” and Art. 13(1) “Die Wohnung ist unverletzlich”. Supports Art. 1(3), that the basic rights bind the legislature, the executive and the judiciary as directly applicable law. Supports Art. 2(2), that everyone has the right to life and physical integrity, that freedom of the person is inviolable, and that these rights may be interfered with only pursuant to a law. Supports the HOME provision in full: Art. 13(2) “Durchsuchungen dürfen nur durch den Richter, bei Gefahr im Verzuge auch durch die in den Gesetzen vorgesehenen anderen Organe angeordnet und nur in der dort vorgeschriebenen Form durchgeführt werden”; Art. 13(3), acoustic surveillance of a home on judicial order where particular facts justify suspicion of an especially serious crime specifically defined by law and alternative methods would be disproportionately difficult or unproductive, for a limited time, ordered by a panel of three judges (a single judge where time is of the essence); Art. 13(4), technical surveillance to avert acute dangers only on judicial order, with a subsequent judicial decision without delay where time was of the essence; Art. 13(5); Art. 13(6), annual reporting to the Bundestag and parliamentary oversight by an elected panel, with comparable oversight in the Länder; and Art. 13(7). Supports the COMMUNICATIONS provision: Art. 10(2), that restrictions may be ordered only pursuant to a law and that where the restriction serves to protect the free democratic basic order or the existence or security of the Federation or of a Land, the law may provide that the person affected shall not be informed and that recourse to the courts shall be replaced by review by agencies and auxiliary agencies appointed by the legislature. Supports Art. 103(1) (“Vor Gericht hat jedermann Anspruch auf rechtliches Gehör”) and Art. 104(1)-(4), including Art. 104(2) “Die Polizei darf aus eigener Machtvollkommenheit niemanden länger als bis zum Ende des Tages nach dem Ergreifen in eigenem Gewahrsam halten” and Art. 104(3), that a person provisionally detained on suspicion of an offence is brought before a judge no later than the day following arrest, who informs, examines, and either issues a written reasoned arrest warrant or orders release. VERIFIED NEGATIVE, and it is stated as a fact about the text and not about German law: the Grundgesetz contains no privilege against self-incrimination and no right to silence. An exhaustive search of the authoritative German text for “Selbstbelastung”, “schweigen”, “Aussage zu verweigern” and “Geständnis” returns zero occurrences, as does a search of the English translation for “incriminat”, “silent”, “silence”, “confession” and “witness against”. This record therefore does NOT support any claim that the principle is absent from German law — it supports only that it is absent from this constitutional text. The German text remains authoritative and the translation may lag later amendments.