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Isawa, Japan

Full City Profile

4.1 /5.0
A Great
29,616 Population 5,142/sq mi density
883 ft Elevation 269 meters
54°F Avg Temperature 12°C
A
Overall
4.1 / 5.0
Strong
B
Economy
3.2 / 5.0
$30,600 median income, 2.2% unemployment
A+
Affordability
5.0 / 5.0
$74,000 home value, $370/mo rent
Isawa experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 34°F in January while summers reach 73°F in July. The area gets 243 sunny days per year. Annual precipitation totals 51.4 inches. The area receives 3.6 inches of snow annually.

Temperature

34°F Jan (1°C) 73°F Jul (23°C)
Annual Average54.4°F
1% above US avg
January Average34°F (1°C)
July Average73°F (23°C)
Sunny Days243 days/yr

Geography

Elevation883 ft (269 m)
Area5.8 sq mi (14.9 km²)
Population Density5,142/sq mi
Coordinates35.6500°N, 138.6333°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 51.4"
35% above US avg
Snowfall 3.6"
Wettest Month (Sep) 7.36"
Driest Month (Dec) 1.26"

Air Quality

Earthquake History

1,189 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.4. Most recent: M4.1 on Aug 23, 2025.

Feb 20, 1990 28 km E of Shimoda, Japan M6.4 119 km
Aug 10, 2009 8 km NE of Sagara, Japan M6.2 106 km
May 4, 2014 31 km ESE of It?, Japan M6.0 109 km
Mar 15, 2011 6 km NNW of Fujinomiya, Japan M6.0 42 km
Jul 23, 2005 9 km WSW of Ichihara, Japan M5.9 123 km
Jan 15, 2007 15 km WSW of Heda, Japan M5.9 84 km
Aug 1, 2011 20 km E of ?yama, Japan M5.9 115 km
Apr 16, 2011 6 km ENE of Tanuma, Japan M5.8 122 km
Feb 25, 2013 29 km NE of Numata, Japan M5.8 144 km
Feb 1, 1992 4 km SSE of Miura, Japan M5.8 110 km
Mar 11, 2011 eastern Honshu, Japan M5.7 147 km
Mar 6, 1996 13 km NNE of Gotenba, Japan M5.6 40 km
Apr 20, 2006 16 km SE of It?, Japan M5.6 102 km
Mar 4, 1997 9 km SSW of It?, Japan M5.6 92 km
Mar 16, 1997 5 km NE of Toyokawa, Japan M5.6 140 km
May 3, 1998 14 km SW of It?, Japan M5.6 92 km
Nov 9, 2013 3 km WSW of Moriya, Japan M5.6 124 km
Apr 11, 2011 8 km WSW of Iiyama, Japan M5.5 133 km
Mar 15, 2012 3 km ENE of ?me, Japan M5.5 61 km
Aug 15, 1998 22 km WSW of Hotaka, Japan M5.5 113 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

38 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 4. Most recent: Ampil (2024).

Year Name Category Closest
2024 Ampil Category 3 283 km
2019 Faxai Category 4 104 km
2019 Hagibis Category 2 70 km
2018 Jongdari Category 2 164 km
2018 Jebi Category 1 258 km
2018 Shanshan Category 1 243 km
2017 Lan Category 1 283 km
2016 Mindulle Category 1 170 km
2014 Phanfone Category 1 86 km
2011 Roke Category 3 58 km
2009 Melor Category 1 261 km
2009 Krovanh Category 1 266 km
2008 Sinlaku Category 1 287 km
2007 Fitow Category 1 52 km
2005 Mawar Category 2 100 km
2004 Ma-on Category 4 78 km
2004 Chaba Category 1 299 km
2003 Etau Category 1 220 km
2002 Higos Category 2 101 km
2001 Danas Category 1 93 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

17 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 105,385 100 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 150 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 100 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m 115 km
2009 HONSHU: S COAST Earthquake 0.6 m 1 106 km
1980 HONSHU ISLAND Earthquake 0.6 m 106 km
1978 TOKAIDO Earthquake 0.4 m 25 109 km
1974 TOKAIDO Earthquake 0.2 m 30 117 km
1990 JAPAN Earthquake 0.2 m 119 km
1857 TOKAIDO Earthquake 99 km
1855 TOKAIDO Earthquake 6,757 105 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake 114 km
1633 SAGAMI BAY Earthquake 150 72 km
1589 SURUGA, JAPAN Earthquake 102 km
1257 SAGAMI BAY, JAPAN Earthquake 93 km
1241 KAMAKURA, SAGAMI BAY Earthquake 86 km
818 TOKAIDO Eruption + Earthquake 78 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Fujisan (33 km).

Name Type Elevation Last Eruption Distance
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 33 km
Yokodake Stratovolcano(es) 2,480 m (8,136 ft) 1200 56 km
Hakoneyama Complex 1,438 m (4,718 ft) 2015 58 km
Asamayama Complex 2,568 m (8,425 ft) 2019 85 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 94 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 94 km
Ontakesan Complex 3,067 m (10,062 ft) 2014 108 km
Kusatsu-Shiranesan Stratovolcano(es) 2,165 m (7,103 ft) 2018 108 km
Norikuradake Stratovolcano(es) 3,026 m (9,928 ft) -50 110 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 113 km
Yakedake Stratovolcano(es) 2,455 m (8,054 ft) 1995 114 km
Shiga Shield(s) 2,041 m (6,696 ft) Unknown 116 km
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 124 km
Washiba-Kumonotaira Shield(s) 2,924 m (9,593 ft) Unknown 126 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 139 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 34°F (1°C) 1.5 in Coldest
February 35°F (2°C) 2.1 in
March 42°F (5°C) 3.5 in
April 52°F (11°C) 4.2 in
May 61°F (16°C) 4.4 in
June 67°F (19°C) 7.0 in
July 73°F (23°C) 5.8 in
August 75°F (24°C) 7.0 in Warmest
September 69°F (20°C) 7.4 in Wettest
October 58°F (14°C) 4.9 in
November 48°F (9°C) 2.5 in
December 39°F (4°C) 1.3 in Driest

Isawa has a seasonal temperature swing of 41°F / from 34°F in January to 75°F in August. Total annual precipitation is 51.4 inches, with September being the wettest month (7.4") and December the driest (1.3").

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