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Kōraku, Japan

Full City Profile

4.1 /5.0
A Great
2,251 Population 219/sq mi density
36 ft Elevation 11 meters
62°F Avg Temperature 17°C
A
Overall
4.1 / 5.0
Strong
B+
Economy
3.5 / 5.0
$45,800 median income, 2.7% unemployment
A+
Affordability
4.6 / 5.0
$166,000 home value, $830/mo rent
Kōraku enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 40°F in January while summers reach 81°F in July. The area gets 288 sunny days per year. Annual precipitation totals 59.7 inches. The area receives 2.5 inches of snow annually.

Temperature

40°F Jan (5°C) 81°F Jul (27°C)
Annual Average62.0°F
15% above US avg
January Average40°F (5°C)
July Average81°F (27°C)
Sunny Days288 days/yr

Geography

Elevation36 ft (11 m)
Area10.3 sq mi (26.7 km²)
Population Density219/sq mi
Coordinates35.7069°N, 139.7455°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 59.7"
57% above US avg
Snowfall 2.5"
Wettest Month (Sep) 7.95"
Driest Month (Dec) 1.57"

Air Quality

Earthquake History

2,501 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.9. Most recent: M4.2 on Aug 29, 2025.

Mar 11, 2011 47 km E of ?arai, Japan M7.9 138 km
Feb 20, 1990 28 km E of Shimoda, Japan M6.4 120 km
Jun 1, 1990 near the east coast of Honshu, Japan M6.3 58 km
Apr 21, 2011 6 km WNW of T?gane, Japan M6.2 53 km
Apr 11, 2011 23 km SE of T?gane, Japan M6.2 82 km
Jun 3, 2000 6 km SE of Narut?, Japan M6.2 67 km
Sep 11, 1996 23 km SSE of Hasaki, Japan M6.2 110 km
Aug 5, 1990 43 km E of ?arai, Japan M6.1 137 km
May 26, 2023 12 km SE of Narutō, Japan M6.1 73 km
Mar 11, 2011 4 km ESE of Hasaki, Japan M6.0 102 km
Mar 14, 2012 5 km SE of Asahi, Japan M6.0 86 km
Apr 3, 2004 37 km ESE of Hitachi, Japan M6.0 139 km
Aug 6, 1991 19 km E of Hasaki, Japan M6.0 117 km
May 4, 2014 31 km ESE of It?, Japan M6.0 93 km
Jul 20, 2000 31 km ESE of Hitachi, Japan M6.0 143 km
Mar 15, 2011 6 km NNW of Fujinomiya, Japan M6.0 116 km
Jan 9, 1995 48 km ENE of Hasaki, Japan M6.0 145 km
Jun 24, 2020 36 km SE of Hasaki, Japan M5.9 123 km
Jul 23, 2005 9 km WSW of Ichihara, Japan M5.9 32 km
Jan 15, 2007 15 km WSW of Heda, Japan M5.9 135 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

38 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 3. Most recent: Nakri (2025).

Year Name Category Closest
2025 Nakri Category 1 293 km
2024 Ampil Category 3 209 km
2024 Jebi Category 1 245 km
2019 Faxai Category 3 27 km
2019 Hagibis Category 2 33 km
2018 Jongdari Category 2 192 km
2018 Shanshan Category 1 159 km
2016 Mindulle Category 1 158 km
2016 Lionrock Category 1 258 km
2014 Phanfone Category 1 152 km
2011 Roke Category 2 54 km
2009 Krovanh Category 1 246 km
2007 Fitow Category 1 51 km
2005 Saola Category 2 267 km
2005 Mawar Category 2 37 km
2004 Ma-on Category 3 13 km
2003 Choi-wan Category 3 283 km
2002 Higos Category 2 26 km
2002 Phanfone Category 1 291 km
2001 Vipa Category 1 255 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

19 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 71 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 112 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 71 km
1732 KUJUKURI BEACH, JAPAN Earthquake 2.0 m 111 km
1670 BOSO, JAPAN Earthquake 2.0 m 116 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m 92 km
1980 HONSHU ISLAND Earthquake 0.6 m 112 km
1978 TOKAIDO Earthquake 0.4 m 25 109 km
1923 RYUKYU ISLANDS Earthquake 0.3 m 99 km
1896 KASHIMA, JAPAN Earthquake 0.3 m 143 km
1990 JAPAN Earthquake 0.2 m 120 km
1855 TOKAIDO Earthquake 6,757 8 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake 68 km
1642 BOSO, JAPAN Earthquake 96 km
1633 SAGAMI BAY Earthquake 150 75 km
1602 BOSO, JAPAN Eruption + Earthquake 96 km
1257 SAGAMI BAY, JAPAN Earthquake 61 km
1241 KAMAKURA, SAGAMI BAY Earthquake 65 km
818 TOKAIDO Eruption + Earthquake 69 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Hakoneyama (84 km).

Name Type Elevation Last Eruption Distance
Hakoneyama Complex 1,438 m (4,718 ft) 2015 84 km
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 100 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 107 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 107 km
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 114 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 117 km
Nantaisan Stratovolcano 2,486 m (8,156 ft) -9540 120 km
Omanago Group Lava dome(s) 2,341 m (7,680 ft) -3050 123 km
Nikko-Shiranesan Shield 2,578 m (8,458 ft) 1952 126 km
Takaharayama Stratovolcano 1,795 m (5,889 ft) -4570 133 km
Asamayama Complex 2,568 m (8,425 ft) 2019 135 km
Yokodake Stratovolcano(es) 2,480 m (8,136 ft) 1200 135 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 139 km
Hiuchigatake Stratovolcano 2,356 m (7,730 ft) 1544 145 km
Kusatsu-Shiranesan Stratovolcano(es) 2,165 m (7,103 ft) 2018 149 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 40°F (5°C) 1.7 in Coldest
February 42°F (6°C) 2.3 in
March 47°F (9°C) 4.0 in
April 58°F (14°C) 4.7 in
May 66°F (19°C) 5.1 in
June 71°F (22°C) 6.9 in
July 81°F (27°C) 6.2 in Warmest
August 81°F (27°C) 6.2 in
September 74°F (23°C) 8.0 in Wettest
October 64°F (18°C) 6.6 in
November 54°F (12°C) 3.4 in
December 45°F (7°C) 1.6 in Driest

Kōraku has a seasonal temperature swing of 41°F / from 40°F in January to 81°F in July. Total annual precipitation is 56.4 inches, with September being the wettest month (8.0") and December the driest (1.6").

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