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Sanmu, Japan
Chiba · Japan
Sanmu is a mid-size city in Chiba, Japan with a population of 48,444. Elevation: 171 ft (52 m). Average temperature: 59°F (15°C).
Data updated June 2026
Discover Sanmu, Japan
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People
Economy
BHousing
A+Climate
| Population | 48,444 |
| Population Density | 855 / sq mi |
| Elevation | 171 ft (52 m) |
| Coordinates | 35.6276°, 140.4176° |
| Timezone | Asia/Tokyo |
| Country | 🇯🇵 Japan |
| State / Province | Chiba |
| Average Temperature | 59°F (15°C) |
| January Average | 40°F (5°C) |
| July Average | 75°F (24°C) |
| Annual Precipitation | 58.1 inches (1,475 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
| Median Household Income | $35,400 |
| Median Age | 47.5 years |
About Sanmu
Sanmu is a mid-size city in Japan (Chiba) with a population of 48,444. The city sits at an elevation of 171 feet (52 meters) above sea level. The average annual temperature is 59°F (15°C). Temperatures range from 40°F in January to 75°F in July. Annual precipitation averages 58.1 inches. The timezone is Asia/Tokyo.
Population
Language Spoken at Home
Social Characteristics
Sanmu vs Japan Average
Income: Sanmu vs Japan
Commute Mode
Income
| Median HH Income | $35,400 |
| 53% below Japan avg |
Employment & Poverty
| Unemployment | 2.5% |
| 31% below Japan avg | |
| Establishments (County) | 1,550 |
Business (County)
Tax & Cost of Living
Commute & Transportation
Walkability
Home Value Sources
Ownership Split
Home Values
| Census Median | $102,000 |
| 64% below Japan avg |
Real Estate Market (Redfin)
Rental Costs
| Census Median Rent | $510 |
| 56% below Japan avg |
Ownership & Property
| Housing Units | 19,378 |
Property Tax
Climate in Sanmu
Sanmu has an average annual temperature of 0°C (32°F). The hottest month is Jan (0°C), the coldest is Jan (0°C). Average annual precipitation is 1542 mm.
Temperature
| Annual Average | 59.0°F |
| 9% above Japan avg | |
| January Average | 40°F (5°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 231 days/yr |
Geography
| Elevation | 171 ft (52 m) |
| Area | 56.7 sq mi (146.8 km²) |
| Population Density | 855/sq mi |
| Coordinates | 35.6276°N, 140.4176°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 13.0 m (43 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1923 | SAGAMI BAY | Earthquake | 13.0 m | 105,385 | 102 km |
| 1703 | OFF SW BOSO PENINSULA | Earthquake | 11.7 m | 5,233 | 117 km |
| 1677 | OFF SE. BOSO PENINSULA | Earthquake | 8.0 m | 500 | 121 km |
| 1495 | KAMAKURA, SAGAMI BAY, TOKAIDO | Earthquake | 5.0 m | 200 | 102 km |
| 1732 | KUJUKURI BEACH, JAPAN | Earthquake | 2.0 m | - | 59 km |
| 1670 | BOSO, JAPAN | Earthquake | 2.0 m | - | 55 km |
| 1433 | OFF IZU-OSHIMA | Earthquake | 2.0 m | - | 116 km |
| 1938 | JAPAN TRENCH | Earthquake | 0.8 m | - | 148 km |
| 1980 | HONSHU ISLAND | Earthquake | 0.6 m | - | 145 km |
| 1982 | IBARAKI, JAPAN | Earthquake | 0.4 m | - | 132 km |
| 1961 | KASHIMA, JAPAN | Earthquake | 0.4 m | - | 140 km |
| 1961 | KASHIMA, JAPAN | Earthquake | 0.4 m | - | 148 km |
| 1923 | KASHIMA, JAPAN | Earthquake | 0.4 m | - | 128 km |
| 1978 | TOKAIDO | Earthquake | 0.4 m | 25 | 139 km |
| 1923 | RYUKYU ISLANDS | Earthquake | 0.3 m | - | 83 km |
| 1896 | KASHIMA, JAPAN | Earthquake | 0.3 m | - | 110 km |
| 1935 | JAPAN | Earthquake | 0.2 m | - | 140 km |
| 1990 | JAPAN | Earthquake | 0.2 m | - | 147 km |
| 1855 | TOKAIDO | Earthquake | - | 6,757 | 56 km |
| 1782 | ODAWARA, SAGAMI BAY | Eruption + Earthquake | - | - | 88 km |
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Hakoneyama (134 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 134 km |
| Izu-Oshima | Stratovolcano | 758 m (2,487 ft) | 1990 | 137 km |
| Izu-Tobu | Pyroclastic cone(s) | 1,406 m (4,613 ft) | 1989 | 145 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 151 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 151 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 153 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 153 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 156 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 160 km |
| Toshima | Stratovolcano | 508 m (1,667 ft) | -4550 | 161 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 170 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 171 km |
| Niijima | Lava dome(s) | 432 m (1,417 ft) | 886 | 172 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 179 km |
| Miyakejima | Stratovolcano | 775 m (2,543 ft) | 2010 | 189 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 2.2 in | Coldest, Driest |
| February | 42°F (5°C) | 3.1 in | |
| March | 47°F (8°C) | 4.6 in | |
| April | 57°F (14°C) | 4.8 in | |
| May | 64°F (18°C) | 4.9 in | |
| June | 69°F (21°C) | 6.6 in | |
| July | 75°F (24°C) | 4.8 in | |
| August | 79°F (26°C) | 5.1 in | Warmest |
| September | 73°F (23°C) | 7.9 in | Wettest |
| October | 64°F (18°C) | 7.6 in | |
| November | 54°F (12°C) | 4.2 in | |
| December | 45°F (7°C) | 2.2 in |
Sanmu has a seasonal temperature swing of 38°F / from 40°F in January to 79°F in August. Total annual precipitation is 58.1 inches, with September being the wettest month (7.9") and January the driest (2.2").
Schools in Sanmu
2 public schools (NCES 2022-23 data).
| School | Level | Enrollment | Teachers | Student/Teacher |
|---|---|---|---|---|
| 山武市立睦岡小学校 | - | - | - | - |
| 松尾高等学校 | - | - | - | - |
Radio Stations near Sanmu
0 stations within ~55 km.
| Station | Genre | Quality |
|---|
Museums in Sanmu
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Former Hotta Estate | ||||
| Former Main Hall of Gakushuin Primary School | ||||
| Fudoki-no-Oka Museum | ||||
| Museum of Aeronautical Sciences | ||||
| Narita Airport and Community Historical Museum | ||||
| Narita Yōkan Memorial Hall | ||||
| Naritasan Museum of Calligraphy | ||||
| Naritasan Reikokan | ||||
| Old Hirano Family House | ||||
| Old Mikogami Family House | ||||
| Sanrizuka Imperial Farm Museum | ||||
| Sardine Exhibition Room | ||||
| Tōshō-ji Sogoreido. Museum. Temple. | ||||
| サーキットの狼ミュージアム | ||||
| スポーツ資料館 | ||||
| はにわ博物館 | ||||
| 九十九里いわし博物館 | ||||
| 佐倉市武家屋敷 | ||||
| 佐倉市武家屋敷 | ||||
| 佐倉市武家屋敷 | ||||
| 佐倉市武家屋敷 | ||||
| 佐倉市立美術館 | ||||
| 佐倉順天堂記念館 | ||||
| 八街市郷土資料館 | ||||
| 史跡長柄横穴群資料館 | ||||
| 和田ふるさと館歴史民俗資料室（佐倉市立和田公民館別館） | ||||
| 国立歴史民俗博物館 | ||||
| 国際上総埴生美術館 | ||||
| 城西国際大学水田美術館 | ||||
| 塚本美術館 | ||||
| 大原幽学記念館 | ||||
| 宗吾霊宝殿 | ||||
| 山武市歴史民俗資料館 | ||||
| 川村記念美術館 | ||||
| 成田市下総歴史民俗資料館 | ||||
| 旧但馬家住宅 | ||||
| 旧但馬家住宅 | ||||
| 旧武居住宅 | ||||
| 白子町歴史民俗資料室 | ||||
| 芝山町立芝山古墳・はにわ博物館;芝山はにわ博物館 | ||||
| 茂原市立美術館・郷土資料館 | ||||
| 長南町郷土資料館 | ||||
| 香取市文化財保存館 |
Libraries in Sanmu
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| (財)米本図書館 | 0.0 | |||||
| Chiba Prefectural East Library | 0.0 | |||||
| Imba Library | 0.0 | |||||
| Imba Library | 0.0 | |||||
| Narita Municipal Library Narita Branch | 0.0 | |||||
| Narita Public Library | 0.0 | |||||
| Naritasan Buddhism Library | 0.0 | |||||
| Sakura Minami Library | 0.0 | |||||
| Sakura Minami Library | 0.0 | |||||
| Shisui Town Library | 0.0 | |||||
| Tomisato Municipal Library | 0.0 | |||||
| Yokochiba Library | 0.0 | |||||
| Yokoshibahikari Public Library | 0.0 | |||||
| Yokoshibahikari Public Library | 0.0 | |||||
| さんぶの森図書館 (3F) | 0.0 | |||||
| 佐倉市立佐倉図書館 | 0.0 | |||||
| 佐倉市立佐倉図書館 | 0.0 | |||||
| 八街市立図書館 | 0.0 | |||||
| 千葉市緑図書館 | 0.0 | |||||
| 千葉市緑図書館 | 0.0 | |||||
| 千葉市緑図書館 | 0.0 | |||||
| 千葉市緑図書館あすみが丘分館 | 0.0 | |||||
| 千葉市緑図書館土気図書室 | 0.0 | |||||
| 印西市立小林図書館 | 0.0 | |||||
| 図書館 | 0.0 | |||||
| 図書館 | 0.0 | |||||
| 多古町立図書館 | 0.0 | |||||
| 大網白里市図書室 | 0.0 | |||||
| 大網白里市図書室中部分室 | 0.0 | |||||
| 大網白里市図書室白里分室 | 0.0 | |||||
| 小見川町立小見川図書館 | 0.0 | |||||
| 成東図書館 | 0.0 | |||||
| 成田市立図書館 公津の杜分館 | 0.0 | |||||
| 成田市立図書館中郷分館 | 0.0 | |||||
| 成田市立図書館久住分館 | 0.0 | |||||
| 成田市立図書館八生分館 | 0.0 | |||||
| 成田市立図書館公津分館 | 0.0 | |||||
| 成田市立図書館加良部分館 | 0.0 | |||||
| 成田市立図書館橋賀台分館 | 0.0 | |||||
| 成田市立図書館玉造分館 | 0.0 | |||||
| 成田市立図書館美郷台分館 | 0.0 | |||||
| 成田市立図書館豊住分館 | 0.0 | |||||
| 成田市立図書館遠山分館 | 0.0 | |||||
| 旭市図書館 | 0.0 | |||||
| 東金市立東金図書館 | 0.0 | |||||
| 松尾町図書館 | 0.0 | |||||
| 水田記念図書館 | 0.0 |
Farmers Markets in Sanmu
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| Landrome | |||||
| Sakura Furusato Market | |||||
| 下田農業ふれあい館 | |||||
| 下田農業ふれあい館 | |||||
| 千葉県東部中央市場 | |||||
| 大栄青果小売市場 | |||||
| 市川フラワーオークションジャパン | |||||
| 成田市公設地方卸売市場 | |||||
| 旭青果市場 | |||||
| 花卉市場棟 | |||||
| 関連食品棟 |
Restaurants in Sanmu
1 restaurants within city radius - OpenStreetMap data
Cafes in Sanmu
1 cafes within city radius - OpenStreetMap data
Gas Stations in Sanmu
4 gas stations within city radius - OpenStreetMap data
Golf Courses in Sanmu
2 golf courses within city radius - OpenStreetMap data
Stadiums & Teams in Sanmu
| Team | League | Division |
|---|---|---|
Airports Near Sanmu
31 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Ibaraki Airport | IBR | Large Airport |
| Narita International Airport | NRT | Large Airport |
| Tokyo Haneda International Airport | HND | Large Airport |
| JGSDF Kisarazu Airfield | - | Medium Airport |
| JMSDF Shimofusa Air Base | - | Medium Airport |
| JMSDF Tateyama Air Base | - | Medium Airport |
| Akeno Auxiliary Airfield | - | Small Airport |
| Bando Auxiliary Airfield | - | Small Airport |
| Chiyoda Auxiliary Airstrip | - | Small Airport |
| Haneda Gliderport | - | Small Airport |
| Hoshubana Gliderport | - | Small Airport |
| Iwabuchi Watergate Auxiliary Airfield | - | Small Airport |
| JGSDF Kasumigaura Airfield | - | Small Airport |
| JGSDF Narashino Airfield | - | Small Airport |
| Kisarazu Nakajima Auxiliary Airfield / Kisarazu Heliport | - | Small Airport |
| Kozaki Airfield | - | Small Airport |
| Makabe Gliderport | - | Small Airport |
| Mito Flying Club Airfield | - | Small Airport |
| Namiki Auxiliary Airfield | - | Small Airport |
| Oarai Auxiliary Airfield | - | Small Airport |
| Otone Airfield | - | Small Airport |
| Oyama Kinu Gliderport | - | Small Airport |
| Ryugasaki Airfield | - | Small Airport |
| Sekijo Auxiliary Airfield | - | Small Airport |
| Sekiyado Gliderport | - | Small Airport |
| Skyfield Watarase | - | Small Airport |
| Tokyo Flight Park Moriya Airstrip | - | Small Airport |
| Tsubasa Flying Club Kawashima Auxiliary Airfield | - | Small Airport |
| Tsukuba Gliderport | - | Small Airport |
| Urayasu Emergency Runway | - | Small Airport |
| Yomiuri Otone Gliderport | - | Small Airport |
Post Offices in Sanmu
2 post offices.
| Post Office | Address |
|---|---|
| Mutsuoka Post Office | |
| Naruto Hayafune Post Office |
Churches & Religious Organizations in Sanmu
6 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| Awa-jinja | |
| 寳積寺 | |
| 日吉神社 | |
| 早尾神社 | |
| 浅間神社 | |
| 鳥居 |
Quick Facts
🇯🇵 About Japan
Public Holidays in Japan
16 public holidays this year
Frequently Asked Questions About Sanmu
What is the population of Sanmu?
Sanmu has a population of 48,444 residents and is located in Japan. The population density is 855 people per square mile, spread across 56.7 square miles. The median age of residents is 47.5 years, which is older than the national median of 38.9 years.
Is Sanmu expensive to live in?
The median household income is $35,400, 53% below the national average of $75,149. The median home value is $102,000 (64% below the U.S. median). Renters pay a median of $510 per month, below the national average of $1,163. The home price-to-income ratio is 2.9x, indicating housing is reasonably affordable relative to local income levels.
What is the weather like in Sanmu?
Sanmu enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winter temperatures average 40°F in January, while summers reach an average of 75°F in July. The area receives 231 sunny days per year. Annual rainfall totals 58.1 inches.
How is the job market in Sanmu?
The job market in Sanmu is very strong, with unemployment at just 2.5% / well below the national rate of 3.6%. There are 1,550 business establishments in the area.
How much does housing cost in Sanmu?
The median home value in Sanmu is $102,000. For renters, the median monthly rent is $510.