In this town wells up a hot water said to convey a history of more than 1,300 years. And the basin of the river that touches the south of this town and empties into the sea is a village of the culture of rice-growing, where rice has been made for as long as 2,000 years. The rice the river fostered, and the hot water that wells from the ground. This village in the lower reaches of the river, holding hot water and rice — things that both support the floor of living — became one with three neighboring towns in 2005 and widened its city area, and, after once greatly increasing its population, now quietly lessens its number. Tamana’s numbers are the record of a town in which a river of hot water of more than 1,300 years and rice of 2,000 years is inscribed.
A city that opens in the northwest of Kumamoto Prefecture, facing the Ariake Sea, where a river conveying 2,000 years of rice-growing touches its south. To read the population, the merger must be taken into account. In 2005 Tamana City became one anew with three neighboring towns and widened its city area. The population of the former Tamana City just before the merger, in 2005, was 45,341, and the city area after the merger, in 2010, was 69,541. From there it has moved to the 64,292 of 2020. What I (Atlas) want to read here is not the sign "a Kumamoto hot spring," but the causal thread: how the past of a river of hot water of more than 1,300 years and rice of 2,000 years is translated into today’s population and finances.
01 · Seeing the present Tamana in its numbers
In the latest Population Census the population is about 64,000 (64,292 in 2020). To read this city’s population, the merger must be taken into account. In the autumn of 2005, Tamana City became one anew with three neighboring towns and widened its city area. The population of the former Tamana City just before the merger, in 2005, was 45,341, and the city area after the merger, in 2010, was 69,541. The step in population between 2005 and 2010 in this article reflects that widening of the city area by the merger. From there, through the 66,782 of 2015 to the 64,292 of 2020, it has fallen smoothly after the merger.
Looking inside, the figure of a village of rice and hot water facing the Ariake Sea appears. The share aged 65 and over rose from 22.2% in 2000 to 34.2% in 2020, passing three in ten. The household-with-children share is 20.2% (2020), and the Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.43 in fiscal 2023 — a middling level able to cover a little over four-tenths of expenditure with its own tax revenue. The figure shows in the numbers: a village in the lower reaches of the river of hot water and rice, advancing its aging while losing population in the city area after the merger. Why it takes this form cannot be read without going back to the past of the river of hot water and rice.
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 · Hot water of more than 1,300 years, a river of 2,000 years of rice, a land open to the Ariake Sea, a merger with three neighboring towns — the history behind the numbers
This town’s skeleton is set by the hot water that wells from the ground, the river conveying 2,000 years of rice, and the advantage of a land facing the Ariake Sea. The starting layer is the river. The river that touches the south of this town and empties into the Ariake Sea rises at the foot of the Aso outer rim, flows west then turns south, grazes the south of this town and empties into the sea. Its basin is a village of the culture of rice-growing, where rice has been made for as long as 2,000 years, and the festivals and food culture and field landscape connected with rice-growing are still handed down. What opened in the lower reaches of this river is this town.
In the lower reaches of this river, the gifts of hot water and the sea overlapped. In this town wells up a hot water said to convey a history of more than 1,300 years, and it has been known as a hot-spring village from old. Together with that, this land facing the Ariake Sea has been open to the gifts of the sea and the tidal flats. The path to becoming a city also reflects this town. In the autumn of 2005, this town became one anew with three neighboring towns and widened its present city area. Hot water of more than 1,300 years, a river of 2,000 years of rice-growing, a land open to the Ariake Sea, and a merger with three neighboring towns — this town’s form stands upon the past of hot water and rice that the land in the lower reaches of the river conveying 2,000 years of rice held.
Source: Tamana City / Tamana Hot Spring (a hot spring conveying a history of about 1,300 years; a noted hot spring of Tamana, Kumamoto Prefecture — overview) / The Kikuchi River (rising at the foot of the Aso outer rim, flowing west then turning south, touching the south of Tamana City and emptying into the Ariake Sea; its basin [Tamana / Kikuchi / Yamaga / Nagomi] is a cultural landscape of rice-growing continuing for 2,000 years, designated Japan Heritage in 2017 — overview) / Tamana City (established on 2005-10-3 by the new merger of the former Tamana City and Taimei, Yokoshima and Tensui Towns; faces the Ariake Sea, the Kikuchi River touches the south of the city; Tamana Hot Spring — overview)
03 · In the lower reaches of the river of hot water and rice, gently losing population and advancing aging after the merger
What characterizes Tamana is that, while it holds the past of a river of hot water of more than 1,300 years and rice of 2,000 years, it is gently losing population and advancing its aging in the city area after the merger. From the 69,541 of 2010, seen in the city area after the merger, to the 64,292 of 2020, some five thousand were lost over ten years. Even in this village supported by the gifts of hot water and rice, 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 at 34.2% 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 20.2% (2020). The Fiscal Capacity Index of 0.43 is a middling level able to cover a little over four-tenths of expenditure with its own tax revenue. One can read that the income of households living in the village of hot water and rice supports the tax source at a middling level. The population fell after the merger, the aging passed three in ten, and the body of the finances stays at a middling level. The numbers of a village that has fallen gently since widening its city area 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 · The lower reaches of the river of 2,000 years of rice held hot water of more than 1,300 years
The functions Tamana holds are not one. There is the past of lying in the lower reaches of the river that rises at the foot of Aso and empties into the Ariake Sea, whose basin was a village conveying the culture of 2,000 years of rice-growing. There is also the character of holding hot water of more than 1,300 years welling from the ground, and being open also to the gifts of the sea and the tidal flats of the Ariake Sea. The landform of the lower reaches of the river conveying 2,000 years of rice brought the village of rice, and the village of hot water, to this land.
Tamana is a town where the lower reaches of the river of 2,000 years of rice held hot water of more than 1,300 years. From the river of 2,000 years of rice-growing, to the hot water of more than 1,300 years, the land open to the Ariake Sea, and the merger with three neighboring towns, what set the skeleton was the geography of "the lower reaches of the river that rises at the foot of Aso and empties into the Ariake Sea." Rice for 2,000 years, hot water for more than 1,300 years. Things that support the floor of living took root in this land, each across a long span of time, and still stand side by side in the same lower reaches of the river.
Source: The Kikuchi River (rising at the foot of the Aso outer rim, flowing west then turning south, touching the south of Tamana City and emptying into the Ariake Sea; its basin [Tamana / Kikuchi / Yamaga / Nagomi] is a cultural landscape of rice-growing continuing for 2,000 years, designated Japan Heritage in 2017 — overview) / Tamana City / Tamana Hot Spring (a hot spring conveying a history of about 1,300 years; a noted hot spring of Tamana, Kumamoto Prefecture — overview) / Tamana City (established on 2005-10-3 by the new merger of the former Tamana City and Taimei, Yokoshima and Tensui Towns; faces the Ariake Sea, the Kikuchi River touches the south of the city; Tamana Hot Spring — overview)
05 · Atlas’s note — in a town in the lower reaches of the river of hot water and rice, reading the mass widened by the merger and the gentle fall
Lay out Tamana’s numbers and the indicators of a village of rice and hot water facing the Ariake Sea line up: a population falling after the merger, an aging rate of 34.2%, a household-with-children share of 20.2%, and a fiscal capacity of 0.43. But when I (Atlas), as a certified public accountant, read these, what I want to read here is the thickness of the past that this town holds "hot water and rice" — things that both piled up 2,000 years and more than 1,300 years of time. The basin of the river that grazes the south of this town and empties into the sea has made rice for as long as 2,000 years. Together with that, in this town wells up a hot water said to convey a history of more than 1,300 years. The rice the river fostered, and the hot water that wells from the ground. The composition in which things that both support the floor of living took root in this land across a long span of time explains well this town’s map.
Another thing I want to consider is that this town’s population takes the form of "increasing greatly with the merger, then falling gently." In the autumn of 2005 it became one with three neighboring towns and widened its city area, and the population once increased greatly. But after that, as some of the younger generation moved to nearby larger cities, the town’s age as a whole rose, and the population fell gently.
The thickness of population gained by widening the city area, and the gentle decline after it, overlap within one city area. The same lower reaches of the river that rises at the foot of Aso and empties into the Ariake Sea hold rice of 2,000 years and hot water of more than 1,300 years, and now slowly raise their age. Whether to visit this town as a hot-spring village of more than 1,300 years, or to view it as the lower reaches of a rice district of 2,000 years, changes with what draws one’s heart. The same lower reaches of the river that rises at the foot of Aso and empties into the Ariake Sea hold rice of 2,000 years and hot water of more than 1,300 years, and now slowly raise their age.
Source: Population Census (Statistics Bureau, MIC) / Tamana City / Tamana Hot Spring (a hot spring conveying a history of about 1,300 years; a noted hot spring of Tamana, Kumamoto Prefecture — overview) / The Kikuchi River (rising at the foot of the Aso outer rim, flowing west then turning south, touching the south of Tamana City and emptying into the Ariake Sea; its basin [Tamana / Kikuchi / Yamaga / Nagomi] is a cultural landscape of rice-growing continuing for 2,000 years, designated Japan Heritage in 2017 — overview) / Tamana City (established on 2005-10-3 by the new merger of the former Tamana City and Taimei, Yokoshima and Tensui Towns; faces the Ariake Sea, the Kikuchi River touches the south of the city; Tamana Hot Spring — 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_2