In this town is a quarter where storehouses and town houses of white plaster walls line up. Along that street, which keeps a medieval town plan, stand merchant houses from the Edo era to the early Meiji. This port town facing the Seto Inland Sea was once a merchant town called even the "pantry" that stored the domain’s wealth. In summer, goldfish-shaped lanterns, colored with the dye of the local weave, light the white-walled street red. This town, a merchant town called the domain’s pantry, keeps its white walls and goldfish lanterns and now quietly loses population. Yanai’s numbers are the record of a town etched by the history of a port town called the domain’s pantry.
A port town that opens at the base of a peninsula facing the Seto Inland Sea in the south-eastern part of Yamaguchi Prefecture. The population fell gently, from 33,597 in 2000 to 30,799 in 2020. What I (Atlas) want to read here is not the sign "a small Seto Inland Sea port town," but the causal thread: how the history — a merchant town called the domain’s pantry — is translated into today’s population and finances.
01 · Seeing the present Yanai in its numbers
In the 2020 Population Census, this city’s population is 30,799 — a scale that barely passes thirty thousand. Its course is a gentle decline. From 33,597 in 2000 and 35,927 in 2005, it has fallen to 34,730 in 2010, 32,945 in 2015, and 30,799 in 2020.
Looking inside, a Seto Inland Sea port-town figure appears. The share aged 65 and over rose from 26.8% in 2000 to 39.0% in 2020, nearing four in ten. The household-with-children share was somewhat low at 16.5% in 2020, and the Childcare Waitlist was zero in both 2024 and 2025. The Fiscal Capacity Index was 0.50 in fiscal 2023 — a middling level, able to cover half of expenditure with its own tax revenue. The figure of a merchant town called the domain’s pantry, advancing aging while gently losing population, appears in the numbers. Why it takes this shape cannot be read without going back over the history of a port town and merchant houses.
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 · A Seto Inland Sea port town, merchant houses called the domain’s pantry, a white-walled townscape, goldfish lanterns and sweet soy sauce — the history behind the numbers
This town’s history begins with its position as a port town facing the Seto Inland Sea, and the merchant town that grew there. The first layer is the port town. This town is at the base of a peninsula facing the Seto Inland Sea, and prospered as a port town from the Muromachi era. To this port, opened upon the sea road, the products of many regions gathered, and commerce flourished. In the era of domain government, it became a wealthy merchant town, called even the "pantry" that stored the domain’s wealth. The commerce brought by the sea road was at the center of this town.
The figure of this merchant town still remains in the streets. In a quarter that keeps a medieval town plan, storehouses and town houses of white plaster walls from the Edo era to the early Meiji line up, and it is chosen as a national Important Preservation District for Groups of Traditional Buildings. This merchant town also raised its own handcraft. At the close of the shogunate, a certain merchant, drawing inspiration from the lanterns of a far northern land, made goldfish-shaped lanterns from the dye of the local weave, bamboo strips and washi paper, it is told. Together with this, in this town a sweet soy sauce was brewed, at whose mellow taste and aroma the lord is said to have marveled. The Seto Inland Sea port town, the merchant houses called the domain’s pantry, the white-walled townscape, and the goldfish lanterns and ambrosial soy sauce — Yanai’s present continues from this history of a merchant town, held by a port town facing the Seto Inland Sea.
Source: Yanai City, "the white-walled townscape" (the Furuichi/Kanaya district keeps a medieval street plan with town houses from the mid-Edo to early-Meiji eras; a national Important Preservation District for Groups of Traditional Buildings; a merchant town that prospered as a port since the Muromachi era and was called "the Okunando [pantry] of the Iwakuni domain" in the domain era — overview) / Yanai City / the Yanai goldfish lantern (a folk craft said to have been created at the end of the Edo era by Kumagai Rinzaburo, a merchant of Furuichi, who drew inspiration from the goldfish neputa of Hirosaki in Aomori and made it from the local Yanai-jima dye, bamboo strips and washi paper — overview) / Yanai City (a port town at the base of the Murotsu Peninsula facing the Seto Inland Sea; took city status in 1954; the white-walled townscape and the goldfish lantern; the kanro soy sauce — overview)
03 · In a Seto Inland Sea merchant town, gently losing population and advancing in aging
What characterizes Yanai is that, while bearing the history of a merchant town called the domain’s pantry, it gently loses population and advances in aging. From 33,597 in 2000 to 30,799 in 2020, about three thousand fell over twenty years. Even in this town that prospered as a merchant town called the "pantry" storing the domain’s wealth, one can read that the bustle of the commerce gathered by the sea road shifted with the times, a part of the young generation moved to nearby larger cities, and the age of the whole town rose. That the share aged 65 and over neared four in ten at 39.0% in 2020 is its expression.
Meanwhile the Childcare Waitlist was zero in both 2024 and 2025. That the household-with-children share was somewhat low at 16.5% in 2020 can also be read as the reverse side of the town’s age having risen. The Fiscal Capacity Index of 0.50 is a level able to cover half of expenditure with its own tax revenue, in the middle range. It can be read that the income of households living in the Seto Inland Sea merchant town supports the tax source at a middling level. The merchant town called the domain’s pantry now advances in aging while gently losing population. The gentle population decline, the aging nearing four in ten, and the finances staying in the middle range all line up upon the same single road, on which the commerce gathered by the sea road shifted with the times and that town quietly grew old. Pull out only the middling value of a fiscal capacity of 0.50, and the course by which the thickness of the commerce that built the white-walled storehouses thinly remains as the income of households living there now cannot be read.
Source: Population Census (Statistics Bureau, MIC) / Local Government Finance Survey, Fiscal Capacity Index (MIC) / Childcare Facility Status Report (Children and Families Agency)
04 · A merchant town where the bustle is gone and only white walls remain
At Yanai’s center, even after the commerce left, the white-walled street that commerce built remains. At the base of a peninsula facing the Seto Inland Sea, it holds the history of having been a port town opened upon the sea road from the Muromachi era. By the commerce gathered at that port, it grew into a merchant town called even the "pantry" that stored the domain’s wealth, and holds the character of having left the white-walled townscape, the goldfish lanterns and the sweet soy sauce. And the position of a port town facing the Seto Inland Sea raised the merchant town, and the handcraft, in this land.
Yanai is a town where a Seto Inland Sea port town became a merchant town called the domain’s pantry. From the Seto Inland Sea port town, to merchant houses called the domain’s pantry, the white-walled townscape, and the goldfish lanterns and ambrosial soy sauce — the geography of "the base of a peninsula facing the Seto Inland Sea" opened the port town, raised the merchant town, and shaped the town’s outline. The bustle of commerce is gone, and only the white-walled storehouses and town houses that bustle built line the street, keeping a medieval town plan. When summer comes, goldfish lanterns light it red — Yanai’s present places its center of gravity on the side of the townscape that commerce left, more than on the commerce itself.
Source: Yanai City, "the white-walled townscape" (the Furuichi/Kanaya district keeps a medieval street plan with town houses from the mid-Edo to early-Meiji eras; a national Important Preservation District for Groups of Traditional Buildings; a merchant town that prospered as a port since the Muromachi era and was called "the Okunando [pantry] of the Iwakuni domain" in the domain era — overview) / Yanai City (a port town at the base of the Murotsu Peninsula facing the Seto Inland Sea; took city status in 1954; the white-walled townscape and the goldfish lantern; the kanro soy sauce — overview)
05 · Atlas’s note — reading Yanai between the commerce that left and the townscape that remained
Lay out Yanai’s numbers and the indicators of a merchant town opened upon the Seto Inland Sea line up: a gently falling population, an aging rate of 39.0%, a household-with-children share of 16.5%, and a fiscal capacity of 0.50. In the habit of one who reads ledgers, what I want to read here is this town’s history of having been a merchant town called even the "pantry" of the domain. To this port, opened upon the sea road of the Seto Inland Sea, the products of many regions gathered, and commerce flourished. The thickness of that commerce was such as to be called even the "pantry" that stored the domain’s wealth. The chain, in which the commerce brought by the sea road built the white-walled storehouses and town houses and raised handcraft such as the goldfish lanterns and the sweet soy sauce, explains well the structure of a merchant town opened upon the sea road.
The other thing I want to consider is the overlap of time in which this town’s merchant town now remains as a white-walled townscape. The bustle of the commerce that stored the domain’s wealth became a thing of the past as the ways of the sea road shifted. But the white-walled storehouses and town houses that commerce built line the street, keeping a medieval town plan, and are protected as a national Important Preservation District for Groups of Traditional Buildings. The overlap, in which even after the bustle of commerce left, the townscape that bustle built remains, and in summer goldfish lanterns light it, is peculiar to this town. Read with the sign "a small Seto Inland Sea port town," or read as "a town that was a merchant town called the domain’s pantry" — the meaning of the white-walled street differs. The commerce called the domain’s pantry shifted long ago, and only the white-walled storehouses and the goldfish lanterns remain on the street. Whether to long for the memory of the commerce that left, or to choose a life with the townscape that commerce built. There the center of gravity divides in Yanai, and which way to tilt it is for the one who lives there to decide.
Source: Population Census (Statistics Bureau, MIC) / Yanai City, "the white-walled townscape" (the Furuichi/Kanaya district keeps a medieval street plan with town houses from the mid-Edo to early-Meiji eras; a national Important Preservation District for Groups of Traditional Buildings; a merchant town that prospered as a port since the Muromachi era and was called "the Okunando [pantry] of the Iwakuni domain" in the domain era — overview) / Yanai City / the Yanai goldfish lantern (a folk craft said to have been created at the end of the Edo era by Kumagai Rinzaburo, a merchant of Furuichi, who drew inspiration from the goldfish neputa of Hirosaki in Aomori and made it from the local Yanai-jima dye, bamboo strips and washi paper — 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