Iruma City

Tea fields cover a tenth of the city.

Sayama tea fields

Photo by 京浜にけ (CC BY-SA 3.0)

01 ／ Sayama tea

Tea-making, lost for centuries,reopened at the foot of the Sayama Hills.

In 1819 two local men, Yoshikawa Yoshizumi (吉川温恭) and Murano Morimasa (村野盛政), became the first north of the Kantō region to mass-produce steamed sencha, and began trading with Edo tea wholesalers such as Yamamotoyama. The Kasanete Hiraku Chajō no Hi (重闢茶場碑), set up at Izumoiwai Shrine (出雲祝神社) in 1832, records the revival of tea-making after centuries of decline. The name "Sayama tea" comes from this place.

Trade with Edo from 1819
First mass production north of Kantō
Monument set up in 1832

02 ／ Silk reeling

Built to host American traders,it looks like brick but is made of wood.

Ishikawa-gumi Seishi (石川組製糸) was a silk-reeling company that Ishikawa Ikutarō of Kurosu started in 1893 with 20 reeling basins; at its peak it ranked sixth in Japan for raw-silk shipments. In 1921 the company raised the frame of its Western-style guest house to receive American trading partners. Faced with brick-look tiles, the house is actually built of wood, and is a Registered Tangible Cultural Property.

Framed in 1921
6th in Japan for raw-silk shipments
Registered Tangible Cultural Property

03 ／ Hills

On hills jutting out from the mountains,deep-forest wildlife lives.

桜山展望台.jpg — Photo by Hanasakijijii (CC BY-SA 3.0)

The Kaji Hills (加治丘陵) jut out from the Oku-Musashi mountains. Because they stay linked to the mountains, plants and animals usually found only deep in the forest live right beside the town. The Sakurayama Observatory (桜山展望台), at 189 m above sea level, was built in 1987 for the city's 20th anniversary, with views of Mt. Fuji, Mt. Tsukuba and the tea fields below.

Hills linked to the mountains
Observatory at 189 m
Built in 1987

Living here

About 40 minutes from Ikebukuro, no transfer.

about 150,000 people
30 min to a city centre

City Hall is about a 10-minute walk from the South Exit of Irumashi Station on the Seibu Ikebukuro Line, about 40 minutes from Ikebukuro on a train bound for Hannō. The city's railways are the Seibu Ikebukuro Line and the JR Hachikō Line, and most local buses start from Irumashi Station. By car, City Hall is about 10 minutes from Iruma IC on the Ken-Ō Expressway.

People living here: 145,651people
Area: 44.69km²
Households: 61,222households
Rent (average for rentals): 53,929yen
Healthcare: 9 hospitals ／ 66 clinics

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

Children waiting for childcare: —25 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.

Iruma City in Japan35.836°N 139.391°E

to IkebukuroSeibu Ikebukuro Line40min
to IkebukuroSeibu Ikebukuro Line ltd. exp.30min

Travel times follow 市公式「入間市役所への案内図」（2023-03-31 更新）に載っている値。池袋駅から飯能行きで入間市駅まで、乗り換え無し (checked 2026-09-24). They vary by time of day.

Shape

Borders 5 municipalities across 1 prefectures.

Territory of Iruma City

Boundaries: National Land Numerical Information (N03)

North to south

9.8km

Saitama Prefecture: 狭山市, 所沢市, 飯能市
Tokyo: 瑞穂町, 青梅市

Iruma City isthis kind of town.

01Tea fields cover about a tenth of the city, which leads Saitama in Sayama tea output and acreage; the name "Sayama tea" comes from the revival of tea-making at the foot of the Sayama Hills
02A wooden Western-style house survives, built by Ishikawa-gumi Seishi, once one of Japan's leading silk reelers, to host American traders
03Mountain wildlife lives in the Kaji Hills, and the Sakurayama Observatory looks out over tea fields to Mt. Fuji

See the town as it is now.

Facebookcity.iruma ↗

Source: Wikidata (P2002, P2003, P2013, P2397)

If something caught your eye, ask the town itself.

Iruma City official site ↗Wikipedia ↗