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Iwanai, Japan

Hokkaido · Japan

Iwanai is a small city in Hokkaido, Japan with a population of 13,210. Elevation: 20 ft (6 m). Average temperature: 43°F (6°C).

4.1 /5.0
A Great
13,210 Population 104/sq mi density
20 ft Elevation 6 meters
43°F Avg Temperature 6°C
55.6 in Annual Rain
Asia / Tokyo Timezone
$28,900 Median Income
A
Overall
4.1 / 5.0
Great overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$28,900 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$68,000 home value, $340/mo rent

Discover Iwanai, Japan

Explore over 40 sections covering people, economy, housing, health, crime, climate, community, costs, trends, schools, colleges, hospitals, treatment centers, industries, museums, libraries, breweries, farmers markets, grocery stores, pharmacies, campgrounds, parks, trails, stadiums, ski resorts, daycare centers, nursing homes, churches, fire stations, cell towers, bridges, power plants, EV stations, prisons, radio stations, airports, police stations, post offices, Amtrak stations, superfund sites, UNESCO sites, and more.
Use the tabs and dropdown menus below to navigate every data point we track for this city.

Full City Profile

People

Population13,210
Median Age49.6 yrs
Density104/mi²

Economy

B
Median Income$28,900
Unemployment3.0%

Housing

A+
Home Value$68,000
Rent$340
Housing Units5,284

Climate

Avg Temp43°F (6°C)
Rain55.6 in/yr
Sunny Days235/yr
Elevation20 ft (6 m)
Population13,210
Population Density104 / sq mi
Elevation20 ft (6 m)
Coordinates42.9744°, 140.5089°
TimezoneAsia/Tokyo
Country🇯🇵 Japan
State / ProvinceHokkaido
Average Temperature43°F (6°C)
January Average20°F (-7°C)
July Average66°F (19°C)
Annual Precipitation55.6 inches (1,413 mm)
Annual Snowfall19.1 inches (49 cm)
Median Household Income$28,900
Median Age49.6 years

About Iwanai

Iwanai is a small city in Japan (Hokkaido) with a population of 13,210. The city sits at an elevation of 20 feet (6 meters) above sea level. The average annual temperature is 43°F (6°C). Temperatures range from 20°F in January to 66°F in July. Annual precipitation averages 55.6 inches. The timezone is Asia/Tokyo.

Iwanai has a population of 13,210 with a density of 104 people per square mile, spread across 126.6 square miles. The median age is 49.6 years, 28% older than the national median of 38.9.

Population

13,210
Total Population
104
People / sq mi
49.6yrs
Median Age
28% above Japan avg
126.6mi²
Land Area

Language Spoken at Home

Other Languages 100.0%

Social Characteristics

Iwanai vs Japan Average

The median household income in Iwanai is $28,900, which is 62% below the national average of $75,149. The unemployment rate is 3.0% (below the 3.6% US average). The area has 423 business establishments.

Income: Iwanai vs Japan

Commute Mode

Income

Median HH Income$28,900
62% below Japan avg

Employment & Poverty

Unemployment3.0%
17% below Japan avg
Establishments (County)423

Business (County)

Tax & Cost of Living

Commute & Transportation

Walkability

The median home value in Iwanai is $68,000, 76% below the national median of $281,900. Monthly rent averages $340 (71% below the national average of $1,163). There are 5,284 total housing units in the city. The home price-to-income ratio is 2.4x, well within the affordable range.

Home Value Sources

Ownership Split

Home Values

Census Median$68,000
76% below Japan avg

Real Estate Market (Redfin)

Rental Costs

Census Median Rent$340
71% below Japan avg

Ownership & Property

Housing Units5,284

Property Tax

Climate in Iwanai

Iwanai has an average annual temperature of 8.9°C (48°F). The hottest month is Aug (21.5°C), the coldest is Jan (-2.4°C). Average annual precipitation is 1263 mm.

Month Avg °C / °F Min / Max °C Rain (mm)
Jan -2.4°C / 28°F -4.7° / -0.2° 120.8
Feb -2.2°C / 28°F -4.6° / 0.3° 87.6
Mar 0.9°C / 34°F -1.9° / 3.7° 69.3
Apr 6.4°C / 44°F 2.7° / 10° 60.7
May 11.6°C / 53°F 7.6° / 15.5° 67.6
Jun 15.8°C / 60°F 12.3° / 19.3° 59.2
Jul 19.8°C / 68°F 16.8° / 22.9° 95.2
Aug 21.5°C / 71°F 18.4° / 24.7° 132.0
Sep 18.2°C / 65°F 14.7° / 21.6° 153.2
Oct 12.1°C / 54°F 8.5° / 15.7° 127.0
Nov 5.4°C / 42°F 2.4° / 8.5° 150.0
Dec -0.4°C / 31°F -2.8° / 2° 139.9
Iwanai has a cool climate with an average annual temperature of 43°F (6°C). Winters average 20°F in January while summers reach 66°F in July. The area gets 235 sunny days per year, above the national average. Annual precipitation totals 55.6 inches (wetter than the 38-inch national average). The area receives 19.1 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 20 feet, near sea level.

Temperature

20°F Jan (-7°C) 66°F Jul (19°C)
Annual Average43.2°F
20% below Japan avg
January Average20°F (-7°C)
July Average66°F (19°C)
Sunny Days235 days/yr

Geography

Elevation20 ft (6 m)
Area126.6 sq mi (327.8 km²)
Population Density104/sq mi
Coordinates42.9744°N, 140.5089°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 55.6"
46% above Japan avg
Snowfall 19.1"
Wettest Month (Aug) 5.98"
Driest Month (Apr) 2.99"

Air Quality

Earthquake History

492 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.7. Most recent: M5.1 on Aug 18, 2025.

Jul 12, 1993 107 km W of Iwanai, Japan M7.7 108 km
Dec 22, 1996 131 km W of Iwanai, Japan M6.5 132 km
Aug 7, 1993 69 km WNW of Kamiiso, Japan M6.5 123 km
Jul 12, 1993 109 km W of Iwanai, Japan M6.3 109 km
Jun 11, 2023 20 km WSW of Biratori, Japan M6.2 124 km
Aug 24, 1992 9 km NNW of Honch?, Japan M6.2 112 km
Jul 12, 1993 101 km W of Iwanai, Japan M6.0 101 km
Jan 12, 2021 84 km NW of Yoichi, Japan M5.9 91 km
Jul 12, 1993 125 km WNW of Kamiiso, Japan M5.6 148 km
May 23, 1995 Hokkaido, Japan region M5.6 125 km
Feb 28, 2009 37 km NW of Shizunai-furukawach?, Japan M5.5 136 km
Apr 18, 2007 21 km E of Tomakomai, Japan M5.5 116 km
Jul 8, 2014 13 km N of Shiraoi, Japan M5.5 76 km
Sep 19, 1993 111 km W of Iwanai, Japan M5.5 111 km
Feb 21, 2019 25 km ESE of Chitose, Japan M5.4 120 km
Jul 12, 1993 88 km W of Iwanai, Japan M5.4 88 km
Apr 12, 2018 110 km NW of Iwanai, Japan M5.3 111 km
Jul 1, 2017 22 km E of Chitose, Japan M5.3 117 km
Nov 3, 2001 115 km NW of Yoichi, Japan M5.3 118 km
Jul 16, 1993 94 km WNW of Iwanai, Japan M5.3 95 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

1 hurricane (Cat 1+) within 500 km since 1980. Strongest: Category 1. Most recent: Higos (2002).

Year Name Category Closest
2002 Higos Category 1 285 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

6 tsunamis recorded within 500 km. Highest wave on record: 32.0 m (105 ft).

Year Location Cause Max Wave Deaths Distance
1993 SEA OF JAPAN Earthquake 32.0 m 231 108 km
1640 SE. HOKKAIDO ISLAND Explosion 8.0 m 700 102 km
1947 W. HOKKAIDO ISLAND Earthquake 2.0 m 100 km
1993 JAPAN Earthquake 0.2 m 123 km
1834 W. HOKKAIDO ISLAND Earthquake 81 km
1792 W. HOKKAIDO ISLAND Earthquake 59 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

10 volcanoes within 200 km. Closest: Niseko (17 km).

Name Type Elevation Last Eruption Distance
Niseko Stratovolcano(es) 1,308 m (4,291 ft) -4900 17 km
Yoteizan Stratovolcano 1,888 m (6,194 ft) -1050 30 km
Toya Stratovolcano 733 m (2,405 ft) 2001 55 km
Kuttara Stratovolcano(es) 549 m (1,801 ft) 1820 76 km
Shikotsu Caldera 1,320 m (4,331 ft) 1979 78 km
Hokkaido-Komagatake Stratovolcano 1,131 m (3,711 ft) 2000 102 km
Esan Lava dome(s) 618 m (2,028 ft) 1874 141 km
Tokachidake Stratovolcano(es) 2,077 m (6,814 ft) 2004 183 km
Oshima-Oshima Stratovolcano 732 m (2,402 ft) 1790 188 km
Osorezan Stratovolcano 878 m (2,881 ft) 1787 195 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 20°F (-7°C) 5.8 in Coldest
February 21°F (-6°C) 4.3 in
March 28°F (-2°C) 3.3 in
April 39°F (4°C) 3.0 in Driest
May 49°F (10°C) 3.0 in
June 57°F (14°C) 3.2 in
July 66°F (19°C) 4.5 in
August 68°F (20°C) 6.0 in Warmest, Wettest
September 60°F (15°C) 6.0 in
October 48°F (9°C) 5.1 in
November 37°F (3°C) 5.8 in
December 26°F (-3°C) 5.8 in

Iwanai has a seasonal temperature swing of 47°F / from 20°F in January to 68°F in August. Total annual precipitation is 55.6 inches, with August being the wettest month (6.0") and April the driest (3.0").

View full weather details →

Schools in Iwanai

8 public schools (NCES 2022-23 data).

School Level Enrollment Teachers Student/Teacher
町立岩内第二中学校
町立岩内西小学校
町立岩内東小学校
町立西陵小学校
町立北辰小学校
北海道共和高等学校
町立岩内第一中学校
北海道岩内高等学校
View full schools details →

Radio Stations near Iwanai

0 stations within ~55 km.

Station Genre Quality

Museums in Iwanai

NameTypeAddressPhoneAnnual Revenue
共和町かかし古里感
原子力PRセンターとまりん館
有島記念館
木田金次郎美術館
荒井記念美術館
西村計雄記念美術館

Libraries in Iwanai

NameAddressStaffAnnual VisitsCirculationCollectionPrograms
ニセコ町学習交流センタ- 「あそぶっく」0.0

Hotels in Iwanai

6 hotels within city radius — OpenStreetMap data

Hotel Ions
Iwanai Brewery & Hotel
Iwanai Kogen Hotel
Iwanai Marine Hotel
Iwanai Onsen Okaerinasai
Iwanai Onsen Takashima Ryokan

Restaurants in Iwanai

16 restaurants within city radius — OpenStreetMap data

Botan Shokudo
Gobangai
Iwanai Beer Brewery
Makoto Zushi
Niseko Pizza
Ramen Yoshimiya
Sakuratei
Sasaya Shokudo
Seiryu
Seizushi Shiten
Sushi Man
Taro
ミノタケ料理店
大衆酒場 魚三
知るバー時
食事処 日本海

Cafes in Iwanai

3 cafes within city radius — OpenStreetMap data

coffee enn
COFFEE&REST SABORU
鈴や

Dentists in Iwanai

1 dentists within city radius — OpenStreetMap data

デンタル工房・ヤマオ

Bus Stations in Iwanai

1 bus stations within city radius — OpenStreetMap data

岩内ターミナル

Gas Stations in Iwanai

2 gas stations within city radius — OpenStreetMap data

Hokuren SS
JP #764086778

Banks in Iwanai

4 banks within city radius — OpenStreetMap data

Hokkaido Bank
Hokkaido Shinkin Bank
Japan Post Bank
North Pacific Bank

Breweries in Iwanai

NameTypeAddressPhoneWebsite
Niseko Brewing

Ski Resorts Near Iwanai

21 ski resorts within range.

Resort Slopes (km) Lifts Peak (m) Price Season Night Park
Asahigaoka Ski Resort 0.0 $0
Shakotan Town 0.0 $0
Shiomidai Schanze Otaru Ski Jump 0.0 $0
Otaru Tenguyama Ski Area 0.0 $0
Snowcruse ONZE 0.0 $0
Asarigawa Onsen Ski Resort 0.0 $0
Consadole Niki Ski Park 0.0 $0
Sapporo Teine 0.0 $0
Sapporo Kokusai Skiing Resort 0.0 $0
Kiroro Resort 0.0 $0
Iwanai Resort 0.0 $0
Muroran-shi Ski Area 0.0 $0
Chisennupri 0.0 $0
Niseko United 0.0 $0
Niseko Moiwa Ski Resort 0.0 $0
Suttsu Town Ski Area 0.0 $0
Rusutsu Resort Ski Area 0.0 $0
Funamidai Ski Area 0.0 $0
Orofure Ski Area 0.0 $0
Sanlaiva 0.0 $0
Pirika Ski Resort 0.0 $0

Airports Near Iwanai

5 airports within the area.

AirportIATAType
JASDF Yakumo AirbaseSmall Airport
JGSDF Camp Horobetsu AirfieldSmall Airport
Otaki AirfieldSmall Airport
Shiraoi GliderportSmall Airport
Yoichi Agricultural Airfield / Appleport YoichiSmall Airport

Post Offices in Iwanai

6 post offices.

Post OfficeAddress
前田郵便局
岩内大浜簡易郵便局
岩内宮園簡易郵便局
岩内東山簡易郵便局
岩内郵便局
島野郵便局

Churches & Religious Organizations in Iwanai

16 religious organizations (IRS tax-exempt data).

NameAddress
Iwanai Konpira Shrine
伊夜日子神社
光照寺
全修寺
八幡神社
創価学会
地蔵寺
岩内神社
帰厚院
敷島内神社
智恵光寺
本弘寺
蓮華寺
野束神社
阿弥陀寺
鳳翔寺

Explore Near Iwanai

Waterfalls
4
Natural waterfalls documented by USGS and OpenStreetMap contributors
View all →

Quick Facts

Timezone
Asia/Tokyo

🇯🇵 About Japan

Capital Tokyo
Population 126,529,100
Area 377,835 km²
GDP (USD) $4,213,167,237,906
GDP per capita $33,836
HDI 0.925
Life expectancy 84.0 years
Internet users 87.0%
Urban population 92.1%
Currency JPY (Yen)
Languages Japanese
Calling code +81
TLD .jp
Driving side left

Public Holidays in Japan

16 public holidays this year

Date Holiday Local Name
Jan 1 New Year's Day 元日
Jan 12 Coming of Age Day 成人の日
Feb 11 Foundation Day 建国記念の日
Feb 23 The Emperor's Birthday 天皇誕生日
Mar 20 Vernal Equinox Day 春分の日
Apr 29 Shōwa Day 昭和の日
May 4 Greenery Day みどりの日
May 5 Children's Day こどもの日
May 6 Constitution Memorial Day 憲法記念日
Jul 20 Marine Day 海の日
Aug 11 Mountain Day 山の日
Sep 21 Respect for the Aged Day 敬老の日
Sep 23 Autumnal Equinox Day 秋分の日
Oct 12 Sports Day スポーツの日
Nov 3 Culture Day 文化の日
Nov 23 Labour Thanksgiving Day 勤労感謝の日

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Get a comprehensive, print-ready PDF with all data for Iwanai.

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Frequently Asked Questions About Iwanai

What is the population of Iwanai?

Iwanai has a population of 13,210 residents and is located in Japan. The population density is 104 people per square mile, spread across 126.6 square miles. The median age of residents is 49.6 years, which is older than the national median of 38.9 years.

Is Iwanai expensive to live in?

The median household income is $28,900, 62% below the national average of $75,149. The median home value is $68,000 (76% below the U.S. median). Renters pay a median of $340 per month, below the national average of $1,163. The home price-to-income ratio is 2.4x, indicating housing is reasonably affordable relative to local income levels.

What is the weather like in Iwanai?

Iwanai has a cool climate with an average annual temperature of 43°F (6°C). Winter temperatures average 20°F in January, while summers reach an average of 66°F in July. The area receives 235 sunny days per year. Annual rainfall totals 55.6 inches, with 19.1 inches of snow.

How is the job market in Iwanai?

Iwanai has a healthy job market with an unemployment rate of 3.0%, near the national average of 3.6%. There are 423 business establishments in the area.

How much does housing cost in Iwanai?

The median home value in Iwanai is $68,000. For renters, the median monthly rent is $340.

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