This land’s castle site stands on a cliff, leaving only its stone walls. In the Meiji era the buildings were torn down, and only the stone walls remained on the mountain. In a later age, one composer who visited this ruined castle is said to have conceived a melody from the stone walls standing under the moon. The castle stands in a mountain land, ringed by a gentle range to the north and another large mountain’s rim to the west. From the bosom of the mountains, clear water wells up. The former city and three neighboring towns, those four, were bound into one, and the present city was established. This castle-town land of "The Moon over the Ruined Castle" widened its city area through the merger while losing population. Taketa’s numbers are the record of a town in which spring water and the merger are inscribed.
A city that opens in a mountain land ringed by a gentle range and a large mountain’s rim, in the southwest of Oita Prefecture. This city was established in 2005 by binding the former city and three towns into one. The former city alone was 17,489 in 2000; reflecting the merger, 2005 was 26,534, and from there it has moved to the 20,332 of 2020. What I (Atlas) want to read here is not the sign "a city of the southwest of the prefecture," but the causal thread: how the past of spring water and the merger is translated into today’s population and finances.
01 · Seeing the present Taketa in its numbers
In the latest Population Census the population is about 20,000 (20,332 in 2020). This city’s population must be read with care, because the range measured changed through the merger. The former city alone was 17,489 in 2000; the population after becoming one city by adding three towns in 2005 rises once to 26,534. This is not that the population actually increased, but a step due to the range measured widening. From there it has fallen to the 24,423 of 2010, the 22,332 of 2015, and the 20,332 of 2020.
Looking inside, the figure of a mountain castle-town city greatly raising its age appears. The share aged 65 and over rose from 44.5% in 2015 to 48.2% in 2020, nearing five in ten. The household-with-children share is 13.1% in 2020, and the crude birth rate is 4.7 per thousand in 2020. The Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.25 in fiscal 2023 — a level able to cover only a quarter of expenditure with its own tax revenue, with a large degree of reliance on the local allocation tax. The figure of the castle-town land of "The Moon over the Ruined Castle," losing population while widening its city area through the merger and deepening its aging, shows in the numbers. Why it takes this form cannot be read without going back to the past of the mountain castle town, the spring water and the merger.
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 mountain castle town, the cliff castle site, the spring water of the mountains, the merger of one city and three towns — the history behind the numbers
This town’s skeleton is set by the landform of a mountain castle town, the cliff castle site, the spring water of the mountains, and the merger of the former city and three towns. The starting layer is the mountain castle town. This land opens in a mountain area, ringed by a gentle range to the north and another large mountain’s rim to the west. This castle-town land, ringed by mountains, was the foundation of this town.
In this mountain area, a cliff castle stood. The castle was built atop a cliff, and in the Meiji era the buildings were torn down and only the stone walls remained. In a later age, one composer who visited this ruined castle is said to have conceived a melody from the stone walls standing under the moon. From the bosom of the mountains, clear water wells up and has moistened the living of this land. The path to becoming a city, too, mirrors this town. In 2005 the former city and three neighboring towns, those four, were bound into one, and became the present city. By this the range the city measures widened, and a step arose in the population statistics. The mountain castle town, the cliff castle site, the spring water of the mountains, and the merger of one city and three towns — this town’s form stands upon the past of the castle, the spring water and the merger that the castle town ringed by mountains carved.
Source: Taketa City / Oka Castle and "Kojo no Tsuki" (the former Taketa Town was the castle town of the Oka domain; Oka Castle is said to be the place where the composer Taki Rentaro conceived "The Moon over the Ruined Castle" — overview) / Taketa City / spring water and mountains (in nearly the center of Kyushu, ringed by the Kuju range to the north and the Aso outer rim to the west; holding the Taketa spring-water cluster — overview) / Taketa City (established on 2005-4-1 by the new merger of the former Taketa City and Ogi, Kuju and Naoiri Towns of Naoiri County; the former Taketa City alone in 2000 = 17,489; the city area widened — overview)
03 · In the castle-town land of "The Moon over the Ruined Castle," losing population while widening the city area through the merger
What characterizes Taketa is that, while it holds the past of a cliff castle site, it is losing population after widening its city area through the merger. Through the 2005 merger the city’s population rose once to 26,534, but this is a step due to the range measured widening by adding three towns to the former city, not that the population actually increased. From there it has fallen to the 24,423 of 2010, the 22,332 of 2015, and the 20,332 of 2020. Even in this mountain castle-town land, one can read that much of the younger generation moved toward the larger cities, and the town’s age as a whole greatly rose. That the share aged 65 and over neared five in ten at 48.2% 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 13.1% in 2020, and the crude birth rate is 4.7 per thousand in 2020. The Fiscal Capacity Index of 0.25 is a level able to cover only a quarter of expenditure with its own tax revenue, showing the large degree of reliance on the local allocation tax seen in common across mountain castle-town lands. The castle-town land of "The Moon over the Ruined Castle" now widens its city area through the merger while losing population and deepening its aging. That the castle was torn down and became ruined stone walls, rather, gave rise to a melody — this town has a habit of what is lost remaining in another form. That the population seemed once to "increase" through the merger, and that the castle was ruined and became a melody, both ask the same reading of "appearance and substance diverging."
Source: Population Census (Statistics Bureau, MIC) / Local Government Finance Survey, Fiscal Capacity Index (MIC) / Childcare Facility Status Report (Children and Families Agency)
04 · A castle town ringed by mountains held a cliff castle site and spring water, this past
The functions Taketa holds are not one. It holds a mountain castle town, ringed by a gentle range to the north and a large mountain’s rim to the west. It holds a castle site that leaves only its stone walls atop a cliff, where a later age’s composer is said to have conceived a melody from the stone walls under the moon. And from the bosom of the mountains, clear water wells up.
From the landform of a mountain castle town, to the cliff castle site, the spring water of the mountains, and the merger of one city and three towns — the geography of "a mountain area ringed by a gentle range and a large mountain’s rim" gave rise to the cliff castle and held the spring water of the mountains. The cliff castle site and the spring water are folded together in the same single place of the southwest of Oita Prefecture, and set the present form of Taketa.
Source: Taketa City / Oka Castle and "Kojo no Tsuki" (the former Taketa Town was the castle town of the Oka domain; Oka Castle is said to be the place where the composer Taki Rentaro conceived "The Moon over the Ruined Castle" — overview) / Taketa City / spring water and mountains (in nearly the center of Kyushu, ringed by the Kuju range to the north and the Aso outer rim to the west; holding the Taketa spring-water cluster — overview) / Taketa City (established on 2005-4-1 by the new merger of the former Taketa City and Ogi, Kuju and Naoiri Towns of Naoiri County; the former Taketa City alone in 2000 = 17,489; the city area widened — overview)
05 · Atlas’s note — in the castle town of "The Moon over the Ruined Castle," reading a past where what is lost remains in another form
Lay out Taketa’s numbers and the indicators of a mountain castle-town city deepening its age line up: a population with a step from the merger, an aging rate of 48.2%, a household-with-children share of 13.1%, and a fiscal capacity of 0.25. What I want to confirm first is that the population seeming to increase in 2005 is a step due to the range measured widening by adding three towns to the former city, not that people actually increased. The former city alone was 17,489 in 2000. The population of a town that had a merger will be misread unless one takes account of the change in the range measured. That one must not mistake the step of the year the range changed for an increase of population is the first caution in reading the numbers.
Another thing I want to consider is that this town holds the past in which "a ruined castle, torn down in the Meiji era to leave only stone walls, made a later age’s composer conceive a melody." The castle itself was lost, but that ruined figure, rather, gave rise to a melody. What is lost can remain in another form.
The single passage of melody that made this town known across the country was born not from a splendid keep but from the stone walls torn down and gone to ruin in the Meiji era. I (Atlas), who read numbers with the eye of accounting, too, read the 2005 step where the population seemed to "increase" not as proof of prosperity but as a matter of how it was measured — a beginning is always in a place that does not look like much.
Source: Population Census (Statistics Bureau, MIC) / Taketa City / Oka Castle and "Kojo no Tsuki" (the former Taketa Town was the castle town of the Oka domain; Oka Castle is said to be the place where the composer Taki Rentaro conceived "The Moon over the Ruined Castle" — overview) / Taketa City / spring water and mountains (in nearly the center of Kyushu, ringed by the Kuju range to the north and the Aso outer rim to the west; holding the Taketa spring-water cluster — overview) / Taketa City (established on 2005-4-1 by the new merger of the former Taketa City and Ogi, Kuju and Naoiri Towns of Naoiri County; the former Taketa City alone in 2000 = 17,489; the city area widened — 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 (wave34-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: wave34w_