Kanzaki-shi

In the latest Population Census the population is about 31,000 (31,022 in 2020). Because this city was established in 2006 by binding two towns and one village anew into one, its population statistics as a city cover the period from 2010, after the merger, on — the period the Census reflects. From the 32,899 of 2010, to the 31,842 of 2015, to the 31,022 of 2020, it has decreased.

Looking inside, the figure of a village holding Yayoi remains and a highway post appears. The share aged 65 and over rose from 28.5% in 2015 to 31.5% in 2020, passing three in ten. The household-with-children share is 23.0% (2020), and the crude birth rate is 6.9 per thousand in 2020. The Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.43 in fiscal 2023 — a level able to cover only a little over four-tenths of expenditure with its own tax revenue. The figure of a village of Yayoi moats aging while losing population after the merger comes out in the numbers. Why it takes this form cannot be read without going back to the past of the Yayoi remains, the highway post and somen.

The town of Kanzaki stands upon a Yayoi settlement site, a post town of the Nagasaki Road, somen drawing the river’s water, and the merger of two towns and one village. The starting layer is the Yayoi settlement. In this land’s plain sleep the remains of a Yayoi settlement, moat-encircled and among the largest in Japan. From these remains, which straddle the neighboring town, the life of people who raised rice and put up watchtowers rose up, and they were counted as a National Special Historic Site. This plain, where people have raised rice for more than two thousand years, was this town’s old foundation.

In early-modern times a highway cut across this plain. The highway running to Nagasaki passed through the plain, a post town flourished, and people and goods came and went. Drawing the water of a river that flows down from the mountains behind, the handcraft of somen — drying thin noodles — also took root. The path to becoming a city also reflects this town. In 2006 the towns of the plain and the village in the mountains were bound anew into one, and the present city was established. The Yayoi moat remains, the Nagasaki Road post, the river water and somen, and a merger of two towns and one village — the plain, where rice has been raised for more than two thousand years, has carved the past of the Yayoi remains and the highway post.

What characterizes Kanzaki is that, while it holds the past of a village of Yayoi moats, it is losing population after the merger. From the 32,899 of 2010, seen in the city area after the merger, to the 31,022 of 2020, some two thousand were lost over ten years. Even in this land where the remains of a Yayoi settlement sleep and a highway post flourished, one can read that some of the younger generation moved toward the larger cities and the town’s age as a whole rose. That the share aged 65 and over passed three in ten at 31.5% 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 23.0% in 2020, and the crude birth rate is 6.9 per thousand in 2020. The Fiscal Capacity Index of 0.43 is a level able to cover only a little over four-tenths of expenditure with its own tax revenue. That it lies not so far from the central city of Saga can be read as holding the fall of population somewhat gentle. The village of Yayoi moats is now aging while losing population after the merger. The population falling after the merger, the aging passing three in ten, and the middling body of the finances stand together upon a plain that has raised rice for over two thousand years. Pull out a single number and that overlap cannot be read.

In Kanzaki, the faces that a single plain showed in each age are layered. One is the village of Yayoi moats, where the remains of a moat-encircled Yayoi settlement, among the largest in Japan, sleep, and which was counted as a National Special Historic Site. Another holds the character of a highway post, where the highway running to Nagasaki cut across the plain and a post town flourished. And it holds the face of a village of somen, drawing the water of a river that flows down from the mountains behind to dry thin noodles. The plain that raised rice for more than two thousand years, and the highway that cut across it, left the Yayoi remains, made the highway post flourish, and rooted the handcraft of somen.

Kanzaki is a town where a plain that raised rice for two thousand years holds a highway post and somen. From the Yayoi moat remains, to the Nagasaki Road post, the river water and somen, and the merger of two towns and one village — in this land of the northern Saga plain, where rice has been raised for more than two thousand years and the highway running to Nagasaki cut across, the remains of a Yayoi settlement and the early-modern post town and somen are folded together upon the same plain. A single gift — water and level land — has supported a different livelihood in each age.