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Saikai, Japan
Nagasaki · Japan
Saikai is a small city in Nagasaki, Japan with a population of 26,275. Elevation: 604 ft (184 m). Average temperature: 60°F (16°C).
Data updated June 2026
Discover Saikai, 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.
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People
Economy
BHousing
A+Climate
| Population | 26,275 |
| Population Density | 39 / sq mi |
| Elevation | 604 ft (184 m) |
| Coordinates | 32.9839°, 129.6809° |
| Timezone | Asia/Tokyo |
| Country | 🇯🇵 Japan |
| State / Province | Nagasaki |
| Average Temperature | 60°F (16°C) |
| January Average | 41°F (5°C) |
| July Average | 78°F (25°C) |
| Annual Precipitation | 82.0 inches (2,083 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
| Median Household Income | $27,000 |
| Median Age | 50.4 years |
About Saikai
Saikai is a small city in Japan (Nagasaki) with a population of 26,275. The city sits at an elevation of 604 feet (184 meters) above sea level. The average annual temperature is 60°F (16°C). Temperatures range from 41°F in January to 78°F in July. Annual precipitation averages 82.0 inches. The timezone is Asia/Tokyo.
Population
Language Spoken at Home
Social Characteristics
Saikai vs Japan Average
Income: Saikai vs Japan
Commute Mode
Income
| Median HH Income | $27,000 |
| 64% below Japan avg |
Employment & Poverty
| Unemployment | 2.5% |
| 31% below Japan avg | |
| Establishments (County) | 841 |
Business (County)
Tax & Cost of Living
Commute & Transportation
Walkability
Home Value Sources
Ownership Split
Home Values
| Census Median | $66,000 |
| 77% below Japan avg |
Real Estate Market (Redfin)
Rental Costs
| Census Median Rent | $330 |
| 72% below Japan avg |
Ownership & Property
| Housing Units | 10,510 |
Property Tax
Climate in Saikai
Saikai has an average annual temperature of 17.7°C (64°F). The hottest month is Aug (28.6°C), the coldest is Jan (7.4°C). Average annual precipitation is 1898 mm.
Temperature
| Annual Average | 59.9°F |
| 11% above Japan avg | |
| January Average | 41°F (5°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 191 days/yr |
Geography
| Elevation | 604 ft (184 m) |
| Area | 674.9 sq mi (1,747.9 km²) |
| Population Density | 39/sq mi |
| Coordinates | 32.9839°N, 129.6809°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 55.0 m (180 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1792 | SHIMABARA BAY, KYUSHU ISLAND | Landslide | 55.0 m | 15,000 | 63 km |
| 1828 | AMAKUSA SEA | Earthquake | - | - | 47 km |
| 1619 | YATSUSHIRO, JAPAN | Earthquake | - | - | 101 km |
| 744 | SW. KYUSHU ISLAND | Earthquake | - | 1,520 | 101 km |
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Unzendake (63 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Unzendake | Complex | 1,483 m (4,865 ft) | 1996 | 63 km |
| Fukue | Shield(s) | 315 m (1,033 ft) | -400 | 86 km |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 133 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 147 km |
| Yonemaru-Sumiyoshiike | Maar(s) | 40 m (131 ft) | -6200 | 160 km |
| Kirishimayama | Shield | 1,700 m (5,577 ft) | 2018 | 161 km |
| Yufu-Tsurumi | Lava dome(s) | 1,584 m (5,197 ft) | 867 | 163 km |
| Aira | Caldera | 1,117 m (3,665 ft) | 2020 | 180 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.1 in | Coldest |
| February | 43°F (6°C) | 3.6 in | |
| March | 48°F (9°C) | 5.4 in | |
| April | 57°F (14°C) | 7.4 in | |
| May | 64°F (18°C) | 8.0 in | |
| June | 70°F (21°C) | 13.9 in | Wettest |
| July | 78°F (25°C) | 13.8 in | |
| August | 80°F (26°C) | 8.0 in | Warmest |
| September | 73°F (23°C) | 8.6 in | |
| October | 64°F (18°C) | 4.1 in | |
| November | 55°F (13°C) | 3.5 in | |
| December | 46°F (8°C) | 2.6 in | Driest |
Saikai has a seasonal temperature swing of 38°F / from 41°F in January to 80°F in August. Total annual precipitation is 82.0 inches, with June being the wettest month (13.9") and December the driest (2.6").
Schools in Saikai
24 public schools (NCES 2022-23 data).
| School | Level | Enrollment | Teachers | Student/Teacher |
|---|---|---|---|---|
| 市立西海中学校 | - | - | - | - |
| 県立大崎高等学校・市立大崎中学校 | - | - | - | - |
| 大島東小学校 | - | - | - | - |
| 西海市立ときわ台小学校 | - | - | - | - |
| 長崎県立大崎高等学校 | - | - | - | - |
| 西海市立大崎中学校 | - | - | - | - |
| 県立西彼農業高等学校 | - | - | - | - |
| 県立西彼杵高等学校 | - | - | - | - |
| 市立雪浦小学校幸物分校 | - | - | - | - |
| 市立雪浦小学校 | - | - | - | - |
| 西海市立西海小学校 | - | - | - | - |
| 市立西海東小学校 | - | - | - | - |
| 市立大串小学校 | - | - | - | - |
| 市立西彼北小学校 | - | - | - | - |
| 市立西彼中学校 | - | - | - | - |
| 市立神浦小学校 | - | - | - | - |
| 市立神浦中学校 | - | - | - | - |
| 西海市立白似田小学校 | - | - | - | - |
| 市立松島小学校 | - | - | - | - |
| 市立形上小学校 | - | - | - | - |
| 市立崎戸小学校 | - | - | - | - |
| 市立大瀬戸中学校 | - | - | - | - |
| 市立大島西小学校 | - | - | - | - |
| 市立大島東小学校 | - | - | - | - |
Radio Stations near Saikai
0 stations within ~55 km.
| Station | Genre | Quality |
|---|
Museums in Saikai
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Arita History and Folklore Museum East | ||||
| Chanpon Museum | ||||
| Dejima Museum | ||||
| Endo Shusaku Literary Museum | ||||
| Former Tashiro Family Western-style House | ||||
| Game Museum/ free with passport | ||||
| Glass Road 1571 | ||||
| Gunkanjima Digital Museum | ||||
| Inori no Oka Art Book Museum | ||||
| Kameyama Shachu Museum | ||||
| Ko-shashin-shiryokan/ museum of old photographs | ||||
| Koshi-byo & Historical Museum of China | ||||
| Maizo-shiryokan/ museum of unearthed artifacts | ||||
| MSDF Museum | ||||
| Museum of glass | ||||
| Nagai Takashi Memorial Museum | ||||
| Nagasaki Atomic Bomb Museum | ||||
| Nagasaki City Bekko Crafts Museum (The Former Nagasaki Customs Sagarimatsu Branch Office) | ||||
| Nagasaki Museum of History and Culture | ||||
| Nagasaki Prefectural Art Museum | ||||
| Nagasakishi Noguchiyataro Memorial Museum | ||||
| name=Memorial House for Father de Rotzthe Reverend Father ：Sardine-fishing net: Shitsu relief Institut Sardine-fishing net Workshop | ||||
| Palace Huis Ten Bosch | ||||
| Porcelain Museum free with passport | ||||
| Sasebo City Museum Shimanose Art Center | ||||
| Shitsu Relief Institut | ||||
| Shitsu Relief Institut Macaroni Workshop | ||||
| Siebold Memorial Museum | ||||
| Sotome Senpuku Kirishitan Culture Museum | ||||
| Teddy Bear Kingdom | ||||
| The Former Hong Kong and Shanghai Bank Nagasaki Branch Museum | ||||
| Twenty-Six Martyrs Museum | ||||
| Ukakami Christian Museum | ||||
| Urakami Christian Museum | ||||
| セイルタワー | ||||
| ナガサキピースミュージアム | ||||
| 七釜鍾乳洞資料館 | ||||
| 中の茶屋・清水崑展示館 | ||||
| 今右衛門古陶磁美術館 | ||||
| 佐賀県立九州陶磁文化館 | ||||
| 原榮三郎美術館 | ||||
| 大浦天主堂キリシタン博物館 | ||||
| 有田ポーセリンパーク | ||||
| 有田焼参考館 | ||||
| 有田町歴史民族資料館西館 | ||||
| 有田陶磁美術館 | ||||
| 有田陶磁美術館 | ||||
| 東彼杵町歴史民俗資料館 | ||||
| 柿右衛門古陶磁参考館 | ||||
| 炎の博記念堂 | ||||
| 蔵の資料館 | ||||
| 西海市大瀬戸歴史民俗資料館 | ||||
| 西海市崎戸歴史民俗資料館 | ||||
| 長崎市外海子ども博物館 | ||||
| 長崎市外海歴史民俗資料館 | ||||
| 長崎市歴史民俗資料館 | ||||
| 長崎市科学館 | ||||
| 長崎純心大学博物館 | ||||
| 音浴博物館 |
Libraries in Saikai
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Arita East Library | 0.0 | |||||
| Arita West Library | 0.0 | |||||
| MWR Library & Education Center | 0.0 | |||||
| MWR Library & Education Center | 0.0 | |||||
| 佐世保市立図書館 | 0.0 | |||||
| 佐世保市立図書館 | 0.0 | |||||
| 佐世保市立図書館 | 0.0 | |||||
| 大島図書館 | 0.0 | |||||
| 早岐住民センター | 0.0 | |||||
| 早岐住民センター | 0.0 | |||||
| 早岐図書館 | 0.0 | |||||
| 早岐図書館 | 0.0 | |||||
| 時津町立時津図書館 | 0.0 | |||||
| 時津町立時津図書館 | 0.0 | |||||
| 波佐見町図書館 | 0.0 | |||||
| 西海市大瀬戸図書館 | 0.0 | |||||
| 西海市立西彼図書館 | 0.0 | |||||
| 長与町図書館 | 0.0 | |||||
| 長崎大学附属図書館 経済学部分館 | 0.0 | |||||
| 長崎市図書センター | 0.0 | |||||
| 長崎市図書センター | 0.0 | |||||
| 長崎市立図書館 | 0.0 | |||||
| 長崎市立図書館 | 0.0 | |||||
| 長崎市立図書館 | 0.0 | |||||
| 長崎県立長崎図書館 | 0.0 | |||||
| 長崎県立長崎図書館 | 0.0 | |||||
| 長崎県立長崎図書館 | 0.0 |
Farmers Markets in Saikai
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| オレンジドーム | |||||
| のんのこ 滑石店 | |||||
| 佐世保市地方卸売市場 | |||||
| 滑石市場 |
Hotels in Saikai
3 hotels within city radius - OpenStreetMap data
Restaurants in Saikai
5 restaurants within city radius - OpenStreetMap data
Theatres in Saikai
2 theatres within city radius - OpenStreetMap data
Monuments in Saikai
6 monuments within city radius - OpenStreetMap data
Zoos in Saikai
2 zoos within city radius - OpenStreetMap data
Theme Parks in Saikai
1 theme parks within city radius - OpenStreetMap data
Train Stations in Saikai
2 train stations within city radius - OpenStreetMap data
Gas Stations in Saikai
5 gas stations within city radius - OpenStreetMap data
Banks in Saikai
1 banks within city radius - OpenStreetMap data
Golf Courses in Saikai
2 golf courses within city radius - OpenStreetMap data
Stadiums & Teams in Saikai
| Team | League | Division |
|---|---|---|
Ski Resorts Near Saikai
1 ski resorts within range.
| Resort | Slopes (km) | Lifts | Peak (m) | Price | Season | Night | Park |
|---|---|---|---|---|---|---|---|
| Tenzan Ski Resort | 0.0 | - | - | $0 | - | - | - |
Airports Near Saikai
9 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Kyushu Saga International Airport | HSG | Large Airport |
| Nagasaki Airport | NGS | Large Airport |
| Amakusa Airport | AXJ | Medium Airport |
| Imari Flying Club Airfield | - | Small Airport |
| JGSDF Metabaru Airfield | - | Small Airport |
| JMSDF Omura Air Base | OMJ | Small Airport |
| Kamigoto Airport | - | Small Airport |
| Kita-Ariake Auxiliary Airfield | - | Small Airport |
| Ojika Airport | - | Small Airport |
Post Offices in Saikai
20 post offices.
| Post Office | Address |
|---|---|
| 七釜郵便局 | |
| 丹納簡易郵便局 | |
| 亀岳郵便局 | |
| 多以良簡易郵便局 | |
| 大串郵便局 | |
| 大瀬戸郵便局 | |
| 太田和簡易郵便局 | |
| 小迎簡易郵便局 | |
| 崎戸本郷簡易郵便局 | |
| 崎戸郵便局 | |
| 形上郵便局 | |
| 松島郵便局 | |
| 池島郵便局 | |
| 神浦郵便局 | |
| 肥前大島郵便局 | |
| 西海南簡易郵便局 | |
| 西海郵便局 | |
| 雪浦郵便局 | |
| 馬込簡易郵便局 | |
| 黒口簡易郵便局 |
Treatment Centers in Saikai
2 treatment centers.
| Center | Type | Phone |
|---|---|---|
| Branch Health Clinic Sasebo | ||
| どうつ耳鼻咽喉科クリニック |
Churches & Religious Organizations in Saikai
7 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| 八木天満宮 | |
| 大山祇神社 | |
| 大瀬戸カトリック教会 | |
| 市杵島神社 | |
| 市杵島神社 | |
| 洲崎神社 | |
| 長濱神社 |
Explore Near Saikai
Quick Facts
🇯🇵 About Japan
Public Holidays in Japan
16 public holidays this year
Frequently Asked Questions About Saikai
What is the population of Saikai?
Saikai has a population of 26,275 residents and is located in Japan. The population density is 39 people per square mile, spread across 674.9 square miles. The median age of residents is 50.4 years, which is older than the national median of 38.9 years.
Is Saikai expensive to live in?
The median household income is $27,000, 64% below the national average of $75,149. The median home value is $66,000 (77% below the U.S. median). Renters pay a median of $330 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 Saikai?
Saikai enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winter temperatures average 41°F in January, while summers reach an average of 78°F in July. The area receives 191 sunny days per year. Annual rainfall totals 82.0 inches.
How is the job market in Saikai?
The job market in Saikai is very strong, with unemployment at just 2.5% / well below the national rate of 3.6%. There are 841 business establishments in the area.
How much does housing cost in Saikai?
The median home value in Saikai is $66,000. For renters, the median monthly rent is $330.