Seto-shi

In the latest Population Census the population is about 130,000 (127,792 in 2020). This city’s population, with no step from a large recent merger, moved from 131,650 in 2000 through 131,925 in 2005, 132,224 in 2010 and 129,046 in 2015 to 127,792 in 2020 — keeping roughly around 130,000 over twenty years while gently declining in recent years.

Looking inside the figures, the form fitting a ceramic town northeast of Nagoya appears. The share aged 65 and over rose nearly double in twenty years, from 15.6% in 2000 to 29.9% in 2020, approaching three in ten. The household-with-children share is 21.5% in 2020, and the Childcare Waitlist, while not zero, moved at a small number — seven in 2024 and two in 2025. The Fiscal Capacity Index was 0.81 in fiscal 2023 — a level high for a provincial city, whose own tax revenue can cover about eight-tenths of expenditure. The figure of a thousand-year town of pottery, keeping its population roughly while deepening its aging sharply and keeping its fiscal stamina high, appears in the numbers. Why it takes this shape cannot be read without going back over the history of Seto ware.

Seto’s skeleton is set by the geography of hills blessed with fine ceramic clay and the wood for fuel, and by the history of pottery piled there for a thousand years. In this land, pottery is said to have been made from around the tenth century. It is handed down that in the Kamakura period Kato Kagemasa began full-scale ceramic production, and since then Seto has been one of Japan’s foremost pottery-producing districts. The word "setomono," referring to pottery in general, was born from this town’s name — so deeply did Seto ware take root in people’s lives. The geographical blessing of fine ceramic clay was translated into the industry of pottery — an example, in economic geography, of a resource’s location giving rise to a peculiar industry.

This pottery town met a turning point in the early modern era. In the latter half of the eighteenth century, when the ceramic trade declined under pressure from porcelain, Kato Tamikichi went to Hizen, learned the method of making porcelain, and brought that skill back to this land. With this, the making of porcelain began in Seto too, and the town thickened into a district producing both ceramics and porcelain. In the Edo era, Seto’s pottery was protected as a monopoly industry under the direct control of the Owari domain, and it supported the town’s economy. In 2017, six old kiln-producing districts including Seto were certified as Japan Heritage under "The Six Ancient Kilns You Are Sure to Fall in Love With." Firing clay from the tenth century, adding the skill of porcelain, and protected by the domain’s monopoly — this town’s shape stands upon the thousand-year history of pottery held by the geography of hills.

What characterizes Seto is that, while holding the thousand-year history of ceramics, it keeps its population roughly through the geography of being near Nagoya, while deepening its aging sharply. That it has kept roughly around 130,000 over twenty years can be read as an expression of its location northeast of Nagoya, built into the Nagoya metropolitan area, holding on to young households to a degree. That population composition is also seen in the household-with-children share of 21.5%.

On the other hand, the share aged 65 and over rose nearly double in twenty years, from 15.6% to 29.9%. It can be read that the aging of the generation engaged in the old industry of ceramics and the aging of the generation that moved into the suburban residential areas overlap and advance on a sharp slope. The Fiscal Capacity Index of 0.81 is a high level, whose own tax revenue can cover about eight-tenths of expenditure; it can be read that local industry, ceramics foremost, and the economy of the Nagoya metropolitan area give thickness to the tax source. The Childcare Waitlist moves at a few people, not reaching zero, but staying at a small number. The thousand-year town of pottery now keeps its population through being near Nagoya, while deepening its aging sharply, and its fiscal stamina is high. The population is almost flat, the aging deepens sharply, and the fiscal stamina is high. That local ceramics thickened the tax source, and that the generation that bore it has aged all at once, are the front and back of one and the same industry.

Seto holds several functions of its own. One is the history of Seto ware, continued from the tenth century and the origin of the word "setomono" — an old stratum of a thousand-year pottery-producing district. Another is the skill of porcelain that Kato Tamikichi brought back from Hizen, leaving the character of a district producing both ceramics and porcelain. And the geography of lying northeast of Nagoya gives this town a peculiar structure: a ceramic town that is at the same time built into the Nagoya metropolitan area.

Seto is the thousand-year ceramic town that became the origin of the word "setomono." From the land of tenth-century pottery, to a district that added the skill of porcelain, to a ceramic town of the Nagoya metropolitan area — the geography of "hills blessed with fine ceramic clay and the wood for fuel" called the thousand-year pottery and set the town’s skeleton. Before the aging rate jumped nearly double in twenty years lies the kiln fire continued from the tenth century. The hills that fired on enough to become the origin of the word "setomono" now mirror the age of those who bore that work.