This town spreads along the middle and upper flow of one of Kyushu’s leading great rivers. Not the river mouth, but the land that opens onto a basin in the middle and upper reaches, where the river still comes through the mountains. Because the landform is near to a basin, days when the daytime temperature exceeds 35 degrees are not rare in summer. The pyroclastic flow an old volcano spewed out, scraped over a long time, has carved many gorges and waterfalls into the city area. Five towns and two villages, bound by the single tie of one Ono County, gave birth to this city. This land of a basin in the middle and upper reaches of a great river has lost population while widening its city area through the merger. Bungo-ono’s numbers are the record of a town in which a basin in the middle and upper reaches of a great river and the merger of five towns and two villages are inscribed.
A city that opens, in the southwest of Oita Prefecture, onto a basin in the middle and upper reaches of one of Kyushu’s leading great rivers. This city was established in 2005 by binding five towns and two villages of Ono County into one. The post-establishment population has moved from 41,548 in 2005 to 33,695 in 2020. What I (Atlas) want to read here is not the sign "a city in the prefecture’s southwest," but the causal thread: how the past of a basin in the middle and upper reaches of a great river and the merger of five towns and two villages is translated into today’s population and finances.
01 · Seeing the present Bungo-ono in its numbers
In the latest Population Census the population is about 34,000 (33,695 in 2020). Because this city was established in 2005 by binding five towns and two villages into one, its statistics cover the period after establishment. The post-establishment population has decreased, from 41,548 in 2005 to 39,452 in 2010, 36,584 in 2015, and 33,695 in 2020.
Looking inside, the figure of a city of a basin in the middle and upper reaches of a great river raising its age greatly appears. The share aged 65 and over rose from 35.2% in 2005 to 40.7% in 2015 and 44.2% in 2020, passing well beyond four in ten. The household-with-children share is 15.9% in 2020, and the crude birth rate is low, at 4.3 per thousand in 2020. The Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.28 in fiscal 2023 — a level able to cover only a little under three-tenths of expenditure with its own tax revenue, with a large degree of reliance on the local allocation tax. The figure shows in the numbers: the land of a basin in the middle and upper reaches of a great river, losing population while widening its city area through the merger. Why it takes this form cannot be read without going back to the past of a basin in the middle and upper reaches of a great river and the merger of five towns and two villages.
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 · The middle and upper reaches of a great river, the basin and gorges, the merger of five towns and two villages — the history behind the numbers
What supports Bungo-ono’s past is the position of the middle and upper reaches of a great river, the landform of basin and gorges, and the merger of five towns and two villages. The oldest layer is the middle and upper reaches of a great river. Along the middle and upper flow of one of Kyushu’s leading great rivers, where it still comes through the mountains, this land spreads. Unlike a river-mouth town, what the river brings here is not the terminus of river transport, but a landform near to a basin, and the heat of summer. The basin in the middle and upper reaches of a great river was this town’s foundation.
Around this basin the remnants of an old volcano are carved. The pyroclastic flow it once spewed out, scraped by the river over a long time, left many gorges and waterfalls in the city area. The basin, and the gorges that carve its edges, have set the scenery of this land. The path to becoming a city, too, mirrors this town. In 2005 the five towns and two villages of Ono County were bound into one, and became the present city. By this the range the city measures widened greatly. The middle and upper reaches of a great river, the basin and gorges, and the merger of five towns and two villages — this town’s form stands upon the past of landform and merger that the basin in the middle and upper reaches, where the great river still comes through the mountains, inscribed.
Source: Bungo-ono City / the middle and upper Ono River (in the southwest of Oita Prefecture, in the middle and upper reaches of the Ono River; a landform near to a basin, prone to fierce summer heat — overview) / Bungo-ono City / Mie Town (the central town of the former Ono County, holding within the city area gorges and waterfalls carved by the Aso pyroclastic flow — overview) / Bungo-ono City (established on 2005-3-31 by the new merger of the five towns and two villages of Ono County — Mie, Kiyokawa, Ogata, Asaji, Ono, Chitose and Inukai; the statistics cover the period after establishment — overview)
03 · In the land of a basin in the middle and upper reaches of a great river, losing population while widening the city area through the merger
What characterizes Bungo-ono is that, while it holds the past of the merger of five towns and two villages, it is losing population even after widening its city area. From the 41,548 of 2005, after establishment, to the 33,695 of 2020, some eight thousand were lost over fifteen years. Even in this land that opens onto a basin, one can read that much of the younger generation moved toward the larger cities, and the town’s age as a whole rose greatly. That the share aged 65 and over passed well beyond four in ten at 44.2% 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 15.9% in 2020, and the crude birth rate is 4.3 per thousand in 2020. The Fiscal Capacity Index of 0.28 is a level able to cover only a little under three-tenths of expenditure with its own tax revenue, showing the large degree of reliance on the local allocation tax seen in common across mountain basin lands. The land of a basin in the middle and upper reaches of a great river is now losing population and deepening its aging while widening its city area through the merger. Seven former towns and villages, each holding its gorges, waterfalls and farming life, became one city — and so settlements thin at once in many places of the wide city area, leading to the fall of the city’s population as a whole and an aging beyond four in ten.
Source: Population Census (Statistics Bureau, MIC) / Local Government Finance Survey, Fiscal Capacity Index (MIC) / Childcare Facility Status Report (Children and Families Agency)
04 · A basin in the middle and upper reaches, where the great river still comes through the mountains, bound five towns and two villages — that past
The functions Bungo-ono holds are not one. It lies along the middle and upper flow — not the mouth — of one of Kyushu’s leading great rivers. It holds the landform of basin and gorges, carved by the old volcano’s pyroclastic flow scraped by the river. And by the single tie of one Ono County, five towns and two villages were bound.
From the position of the middle and upper reaches of a great river, to the basin and gorges, and the merger of five towns and two villages — the geography of "a basin in the middle and upper reaches of one of Kyushu’s leading great rivers" held the gorges the volcano carved, and bound the towns and villages by the tie of the county. The middle and upper reaches of a great river and the basin fold together in the same single place — the southwest of Oita Prefecture — to set the present form of Bungo-ono.
Source: Bungo-ono City / the middle and upper Ono River (in the southwest of Oita Prefecture, in the middle and upper reaches of the Ono River; a landform near to a basin, prone to fierce summer heat — overview) / Bungo-ono City / Mie Town (the central town of the former Ono County, holding within the city area gorges and waterfalls carved by the Aso pyroclastic flow — overview) / Bungo-ono City (established on 2005-3-31 by the new merger of the five towns and two villages of Ono County — Mie, Kiyokawa, Ogata, Asaji, Ono, Chitose and Inukai; the statistics cover the period after establishment — overview)
05 · Atlas’s note — in the land of a basin in the middle and upper reaches of a great river, reading the number of units bound
Lay out Bungo-ono’s numbers and the indicators of a mountain basin city deepening its age line up: a city area widened by merger, an aging rate of 44.2%, a household-with-children share of 15.9%, a crude birth rate of 4.3, and a fiscal capacity of 0.28. What I want to read here is this town’s way of placing its distance from the river — that it "opens onto a basin in the middle and upper reaches, not the mouth, of a great river." Even with the same great river, what the river brings differs between a town at the mouth that pours into the sea and a town in the middle and upper reaches that comes through the mountains. Whereas the river mouth calls forth river transport and trade, the basin of the middle and upper reaches calls forth the gorges the volcano carved, the heat of summer, and a farming life of limited flatland. The reading that where on the river a town is placed divides its character explains this town’s numbers well.
Another thing I want to consider is that this town was born by binding into one a comparatively large number of units — "five towns and two villages." The seven former towns and villages each held their gorges, waterfalls and farming life. Now that they have become one city, the form of small settlements scattered across a wide city area lies behind the number of an aging rate of 44.2%. A city that bound many units holds, by that much, settlements with advancing aging across a wide range.
The past of a basin in the middle and upper reaches, where the great river still comes through the mountains, and the structure that bound seven settlements — once I (Atlas) have laid out these two, my role is done. To decide good or bad is not for me, the accountant, but for the one who is considering whether to live here.
Source: Population Census (Statistics Bureau, MIC) / Bungo-ono City / the middle and upper Ono River (in the southwest of Oita Prefecture, in the middle and upper reaches of the Ono River; a landform near to a basin, prone to fierce summer heat — overview) / Bungo-ono City / Mie Town (the central town of the former Ono County, holding within the city area gorges and waterfalls carved by the Aso pyroclastic flow — overview) / Bungo-ono City (established on 2005-3-31 by the new merger of the five towns and two villages of Ono County — Mie, Kiyokawa, Ogata, Asaji, Ono, Chitose and Inukai; the statistics cover the period after establishment — 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 (wave35-west 2026-06-04)) handled the shaping of the text. Evaluative or predictive language (such as “a good buy” or “attractive”) is intentionally left out. Revision id: wave35w_