Article

12231 ／いんざいし

Inzai City

A hall's ridge tag records three years.

Eifukuji Yakushido, ridge tag

Photo by The-reddest-fox (CC BY-SA 4.0)

01 ／ Shell bed

Stone cut from the Kioroshi shell bedwas laid into the Kamijuku Tumulus chamber.

The Kioroshi shell bed is a sand layer deposited about 120,000 years ago in the ancient Tokyo Bay, and a national Natural Monument. Its outcrop hardens at the surface, and it was used for tomb chamber stones. The horizontal-entry stone chamber of the Kamijuku Tumulus, a city historic site, is built of stone cut from it; the mound is estimated to be a 7th-century square one.

National Natural Monument (2002)
Laid down about 120,000 years ago
Estimated 7th-century square mound

02 ／ Tile pagoda

From a Nara-Heian village site,two seven-story pagodas rebuilt of clay.

A tile pagoda is a pagoda in fired clay, modeled on a wooden one. At the Magome site (Hiraoka), digging in 1997-98 turned up fragments in one cluster, which could be reassembled into two seven-story pagodas. They are thought to have been enshrined in the village, and are prefectural tangible cultural properties.

Two seven-story pagodas reconstructed
Nara-Heian village site
Prefectural tangible cultural property (2008)

03 ／ Koshin stones

A mound of 100 koshin stone monuments,erected in 1863.

The Takenishi Hyaku-koshin mound is a group of koshin stone monuments erected in 1863: 10 carved-image stones and 90 inscribed stones. It is one of a few hundred-koshin sites in the city, and is designated a city historic site.

Erected in 1863
10 carved-image, 90 inscribed stones
City historic site (1999)

Inzai City from the sky

Now and 1974–78. Tap a photo to zoom in.

Now1974–78

Wide (about 6 km across)

Close (about 1.5 km across)

Now (shot May–September 2008)Shot 1974–78

Source: Geospatial Information Authority of Japan (GSI) GSI Tiles（全国最新写真（シームレス）／国土画像情報（第一期：1974〜1978年撮影））

Open in GSI Maps (now)Open in GSI Maps (1974–78)

Living here

From Nihombashi, 41 minutes at best on the Hokuso Line.

about 100,000 people

From Nihombashi, the fastest daily service on the Hokuso Line, which runs through from the Toei Asakusa Line, takes 41 minutes (searched October 2026). City Hall is about a 15-minute walk from Kioroshi Station on the JR Narita Line. Inzai merged with Inba Village and Motono Village in 2010.

People living here: 102,609people
Area: 123.79km²
Households: 38,349households
Rent (average for rentals): 66,889yen
Healthcare: 3 hospitals ／ 61 clinics

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

Population from 2010 onward (municipal boundary changed).2010-03-23 に編入合併（印旛村・本埜村）。2010年調査から市域が変わっている。

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.

Inzai City in Japan35.832°N 140.146°E

to NihombashiToei Asakusa Line and Hokuso Line41min

Travel times follow 北総鉄道公式サイトの乗換検索（hokuso.ekitan.com。2026-10-26 月曜と 2026-10-25 日曜を 5〜23時の毎時で検索）と、同サイトの駅別時刻表（2025年12月13日現在）で、都市の発→千葉ニュータウン中央の着を数えた (checked 2026-10-22). They vary by time of day.

Shape

Borders 9 municipalities across 1 prefectures.

Territory of Inzai City

Boundaries: National Land Numerical Information (Administrative Area Data), MLIT. Processed by Machigatari.Lakes: National Land Numerical Information (Lake Data), MLIT. Processed by Machigatari. Prepared with the approval of the Director-General of the Geospatial Information Authority of Japan, using its Digital Map 25000 (Spatial Data Framework) and Digital Map 25000 (Place Names and Public Facilities). (承認番号平27情使、第585号)

North to south

12.4km

Chiba Prefecture: Sakae Town, Shiroi City, Yachiyo City, Abiko City, Kashiwa City, Sakura City, Shisui Town, Narita City
Ibaraki Prefecture: Tone Town

Inzai City isthis kind of town.

01Eifukuji Yakushido is a thatched hall whose ridge tag is inked with the years of its pillar raising (1466), ridge raising (1469) and completion (1472); it is a national Important Cultural Property
02The Kioroshi shell bed is an ancient Tokyo Bay sand layer and a national Natural Monument; its hardened stone was used in tomb chambers
03Two seven-story pagodas from the Magome site are prefectural cultural properties, and the Takenishi mound of 100 koshin monuments, erected in 1863, is a city historic site

If something caught your eye, ask the town itself.

Inzai City official site ↗Wikipedia ↗

From this town's themes