In this town is the site of a huge coal shaft. It is the shaft that bore the core of a coal mine that, straddling the prefectural border into a city of the neighboring prefecture, once boasted a scale among the country’s largest. The iron headframe and the red-brick buildings remain in the very form of the age when coal was dug up, and are registered as a World Heritage as a legacy that supported this country’s modern industry. This town, holding within its area a great coal mine that straddled the prefectural border, has lost population since the age of coal ended. Arao’s numbers are the record of a town in which a great shaft straddling the prefectural border, and coal, are inscribed.
A city that opens at the northwest tip of Kumamoto Prefecture, touching a city of the neighboring prefecture across the prefectural border. The population has fallen gently, from 56,905 in 2000 to 50,832 in 2020. What I (Atlas) want to read here is not the sign "a coal town," but the causal thread: how the past of a great shaft straddling the prefectural border, and coal, is translated into today’s population and finances.
01 · Seeing the present Arao in its numbers
In the latest Population Census the population is about 51,000 (50,832 in 2020). Its course is a gentle decline. From the 56,905 of 2000, to the 55,960 of 2005, the 55,321 of 2010, the 53,407 of 2015, and the 50,832 of 2020, some six thousand were lost over twenty years.
Looking inside, the figure of a town that has ended the age of coal appears. The share aged 65 and over rose from 24.6% in 2000 to 35.9% in 2020, passing three in ten by a wide margin. The household-with-children share is 20.1% (2020), and the Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.47 in fiscal 2023 — a middling level able to cover about half of expenditure with its own tax revenue. The figure shows in the numbers: a town that held a coal mine straddling the prefectural border, advancing its aging while losing population after the age of coal. Why it takes this form cannot be read without going back to the past of the shaft and coal.
Source: Population Census (Statistics Bureau, MIC) / Local Government Finance Survey, Fiscal Capacity Index (MIC) / Childcare Facility Status Report (Children and Families Agency) / Real Estate Information Library (MLIT)
02 · A great coal mine straddling the prefectural border, a shaft that supported modern times, a World Heritage, the end of the age of coal — the history behind the numbers
This town’s skeleton is set by the coal mine that spread straddling the prefectural border, the shaft that bore its core, and the end of the age of coal. The starting layer is the coal mine. This town is at the northwest tip of Kumamoto Prefecture and touches a city of the neighboring prefecture across the prefectural border. Once, straddling that prefectural border, a great coal mine that boasted a scale among the country’s largest spread. This land, where coal sleeps, became a major producing district of the coal that supported this country’s modern industry.
The core of this coal mine was borne by this town’s shaft. Developed by the full strength of the financial world to the south of the shaft of the city of the neighboring prefecture, this shaft boasted the largest scale in the country at the time. The iron headframe and the red-brick buildings remain in the very form of the age when coal was dug up, and are registered as a World Cultural Heritage as a legacy that supported this country’s modern industry. In time, when the age of digging coal ended, the coal mine ended its role. After the age of coal departed, this town has traced a new course, such as holding a great amusement park near the prefectural border. A great coal mine straddling the prefectural border, a shaft that supported modern times, a World Heritage, and the end of the age of coal — this town’s form stands upon the past of the shaft and the coal mine that the land where coal sleeps, straddling the prefectural border, held.
Source: Arao City "the Manda Pit" (one of the shafts of the Miike Coal Mine, the largest-scale shaft in the country, built by Mitsui about 1.5 km south of the Miyanohara Pit [Omuta City]; a constituent of the 2015 World Cultural Heritage "Sites of Japan’s Meiji Industrial Revolution" — overview) / Arao City / Greenland (one of Kyushu’s largest amusement parks, in Arao City on the prefectural border with Fukuoka; the town’s course after the closure of the Miike Coal Mine — overview) / Arao City (at the northwest tip of Kumamoto Prefecture, touching Omuta City of Fukuoka Prefecture across the prefectural border; the Miike Coal Mine flourished straddling the two cities; city status in 1942 — overview)
03 · In a town that has ended the age of coal, gently losing population and advancing aging
What characterizes Arao is that, while it holds the past of a town that held a great coal mine straddling the prefectural border, it is gently losing population and advancing its aging after ending the age of coal. From the 56,905 of 2000 to the 50,832 of 2020, some six thousand were lost over twenty years. Even in this town that once flourished as a major producing district of coal, when the age of digging coal ended the coal mine ended its role, and one can read that some of the younger generation moved to nearby larger cities, and the town’s age as a whole rose. That the share aged 65 and over passed three in ten by a wide margin at 35.9% in 2020 is an expression of that.
On the other hand, the Childcare Waitlist was zero in both 2024 and 2025. The household-with-children share is 20.1% (2020). The Fiscal Capacity Index of 0.47 is a middling level able to cover about half of expenditure with its own tax revenue. One can read that the income of households living in the town after the age of coal supports the tax source at a middling level. The population falls gently, the aging passes three in ten by a wide margin, and the body of the finances stays at a middling level. The numbers of a town whose resource has ended its role form an image only thus, with population, age and finances laid out on a single sheet.
Source: Population Census (Statistics Bureau, MIC) / Local Government Finance Survey, Fiscal Capacity Index (MIC) / Childcare Facility Status Report (Children and Families Agency)
04 · A coal town straddling the prefectural border held a World Heritage shaft
The functions Arao holds are not one. There is the past of touching, at the northwest tip of Kumamoto Prefecture, a city of the neighboring prefecture across the prefectural border, and holding within its area a great coal mine that spread straddling that prefectural border. There is also the character of leaving the shaft of the largest scale at the time that bore the core of that coal mine in the very form of the age when coal was dug up, and making it a World Heritage that supported this country’s modern industry. This landform, where coal sleeps straddling the prefectural border, brought the great coal mine, and the shaft, to this land.
Arao is a town where a coal town straddling the prefectural border held a World Heritage shaft. From the great coal mine straddling the prefectural border, to the shaft that supported modern times, the World Heritage, and the end of the age of coal, what set the skeleton was the geography of "a land where coal sleeps straddling the prefectural border." The layer of coal in the earth is not divided by the prefectural border. In this land where the administrative line and the resource line do not match, it has shared a single coal mine with a city of the neighboring prefecture.
Source: Arao City "the Manda Pit" (one of the shafts of the Miike Coal Mine, the largest-scale shaft in the country, built by Mitsui about 1.5 km south of the Miyanohara Pit [Omuta City]; a constituent of the 2015 World Cultural Heritage "Sites of Japan’s Meiji Industrial Revolution" — overview) / Arao City (at the northwest tip of Kumamoto Prefecture, touching Omuta City of Fukuoka Prefecture across the prefectural border; the Miike Coal Mine flourished straddling the two cities; city status in 1942 — overview)
05 · Atlas’s note — in a coal town straddling the prefectural border, reading the gap of a resource losing its role
Lay out Arao’s numbers and the indicators of a town that has ended the age of coal line up: a population falling gently, an aging rate of 35.9%, a household-with-children share of 20.1%, and a fiscal capacity of 0.47. But when I (Atlas), as a certified public accountant, read these, what I want to read here is the singularity of the past that this town’s coal mine spread "straddling the prefectural border." The land where coal sleeps is not divided by the prefectural border. Along the layer of coal sleeping in the earth, the coal mine spread straddling the prefectural border, and a city of the neighboring prefecture and this town shared a single coal mine. The structure in which the administrative boundary and the boundary of the resource in the earth do not match explains well the map of a town supported by a resource.
Another thing I want to consider is the gap in which the coal that was the center of this town’s livelihood lost its role with the turning of the age. The coal mine that once boasted a scale among the country’s largest ended its role when the age of digging coal ended, and the shaft that bore its core now remains, in the very form of the age when it was dug up, as a World Heritage. If a resource that supported the center of livelihood loses its role, the town loses population and raises its age.
The town that flourished as a major producing district of coal now advances its aging to the mid three-tenths, and keeps that shaft as a World Heritage. The course a town supported by a resource traces is inscribed in the layer of coal in the earth, which the administrative line cannot divide, and in the Manda shaft, which still remains. Whether to view this town as a land of the history of a coal mine that straddled the prefectural border, or to visit it as a land holding a World Heritage shaft, changes with what one cares for. In the layer of coal in the earth, which the administrative line cannot divide, and in the Manda shaft, which still remains, the course a town supported by a resource traces is inscribed.
Source: Population Census (Statistics Bureau, MIC) / Arao City "the Manda Pit" (one of the shafts of the Miike Coal Mine, the largest-scale shaft in the country, built by Mitsui about 1.5 km south of the Miyanohara Pit [Omuta City]; a constituent of the 2015 World Cultural Heritage "Sites of Japan’s Meiji Industrial Revolution" — overview) / Arao City / Greenland (one of Kyushu’s largest amusement parks, in Arao City on the prefectural border with Fukuoka; the town’s course after the closure of the Miike Coal Mine — overview) / Arao City (at the northwest tip of Kumamoto Prefecture, touching Omuta City of Fukuoka Prefecture across the prefectural border; the Miike Coal Mine flourished straddling the two cities; city status in 1942 — overview)
Editor’s note: all figures and sources are drawn from official statistics. The prose follows Atlas’s voice, and AI (atlas-handcrafted-reverse-v1 (Daiki 2026-06-02)) handled the shaping of the text. Evaluative or predictive language (such as “a good buy” or “attractive”) is intentionally left out. Revision id: wave22_8