Seiyo City

Japanese style, with arched window tops.

Former Kaimei School Building

01 ／ Taho Ammonite (田穂のアンモナイト)

From a limestone outcrop,an early Triassic ammonite was found.

In the Taho limestone of Shirokawa, the geologist Ono Sakutaro (大野作太郎) found an ammonite fossil in the Taisho era. Identification showed the Early Triassic Meekoceras beds, then confirmed for the first time in Japan, the prefectural record says.

Ehime Prefecture natural monument
250 to 240 million years ago
Outcrop protected by wire mesh

02 ／ Kamigawa Shinbutsu-ko (遊子谷上川の神仏講)

A small district gathers a dozen or moreyearly Buddhist and Shinto rites into one day.

Kamigawa in Yusudani is a small district of 12 households (city record). It has kept up its rites for gods and buddhas since Tenmei 4 (1784), now held in one day as the Shinbutsu-ko (神仏講). Villagers visit the shrines and statues, chant the nembutsu, and pray for peace with the Ise dance.

Nationally selected intangible folk cultural property (record-making measures)
Since Tenmei 4 (1784)
Held in mid-April in past years

03 ／ Kasagitoge Kofun (笠置峠古墳)

A keyhole-shaped tomb, described asspoon-like, lies on the Uwa–Yawatahama watershed.

This 47 m keyhole-shaped tomb dates from the early Kofun period. Its rear circular part holds a pit-style stone chamber of piled stones. Standing on a ridge over 411 m high, it overlooks the Uwa basin, Yawatahama and the Sadamisaki Peninsula, and Kyushu on a clear day.

Ehime Prefecture historic site
47 m long
On a ridge over 411 m high

Living here

The Uwa Sea's ria coast in the west, the Shikoku Karst highlands in the east.

about 40,000 people

Seiyo stretches east to west. In the west it faces the Uwa Sea, a ria coast where the Kuroshio current flows in; in the east spread the Shikoku Karst highlands, 1,400 m above sea level. You can tour this land and its life as the Shikoku Seiyo Geopark.

People living here: 35,388people
Area: 514.34km²
Households: 15,474households
Rent (average for rentals): 35,622yen
Healthcare: 3 hospitals ／ 38 clinics

Area and habitable land at the same scalee-Stat B1101 / B1103

Children waiting for childcare: —16 nurseries and similar
Home purchase subsidy: —
Average annual temperature: —

These 3 items are waiting on a nationwide data source. We do not fill them with estimates.

ACCESS

Where you can go from here.

Seiyo City in Japan33.363°N 132.511°E

to OsakaHighway bus392min
to SannomiyaHighway bus342min

Travel times follow 宇和島自動車「高速バス（神戸・大阪線）」（共同運行は阪神バス。事業者公式の時刻表、2026-09-30 に確認）の下り昼行便 (checked 2026-09-30). They vary by time of day.

Shape

Borders 7 municipalities across 1 prefectures.

Territory of Seiyo City

Boundaries: National Land Numerical Information (N03)

North to south

24.2km

Ehime Prefecture: 大洲市, 鬼北町, 八幡浜市, 宇和島市, 内子町, 久万高原町
Kochi Prefecture: 檮原町

Seiyo City isthis kind of town.

01The former Kaimei School building, built in 1882 (Meiji 15) in Uno-machi, Uwa, is a national Important Cultural Property. Amid a mainly Japanese-style design, the tops of the windows on both floors are arched in Western style.
02The Mikame Tunnel is a 317 m brick tunnel in Gonai, Uwa, and a nationally registered tangible cultural property. Both entrances lie in Uwa, but the city explains it took the name of Mikame Village, which bore the larger share of the cost.
03In Karihama, Akehama, a landscape of terraced fields built with limestone and other stone was selected in 2019 as a national Important Cultural Landscape. Uno-machi in Uwa is a preservation district for groups of traditional buildings, with townhouses from the Edo period to before the war.

If something caught your eye, ask the town itself.

Seiyo City official site ↗Wikipedia ↗