Townapedia
Koga city hall (Ibaraki)
Koga city hall (Ibaraki) · Altomarina, CC BY-SA 3.0
Ibaraki Prefectural Koga Daini High School
Ibaraki Prefectural Koga Daini High School · 小石川人晃, CC BY-SA 4.0
Tomoe dairy processing co.,Ltd. (Koga City, Ibaraki Prefecture)
Tomoe dairy processing co.,Ltd. (Koga City, Ibaraki Prefecture) · 小石川人晃, CC BY-SA 4.0
Koga City Koga 3rd Junior High School
Koga City Koga 3rd Junior High School · 小石川人晃, CC BY-SA 4.0
Ashikaga Bank Koga Branch & Sowa Branch
Ashikaga Bank Koga Branch & Sowa Branch · Suikotei, CC BY 4.0
Koga Municipal Koga 2nd Junior High School
Koga Municipal Koga 2nd Junior High School · 小石川人晃, CC BY-SA 4.0

Koga, Japan

古河市

Koga is a town of 139,344 people in Ibaraki, Japan, founded in August 1, 1950.

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Population139,344 GeoNames
Local name古河市
RegionIbaraki
Elevation17 m 56 ft
FoundedAugust 1, 1950
Time zoneAsia/Tokyo
Land area123.6 km²
Nearest airportYokota Air Base (OKO) 59 km

Why visit Koga

Townapedia lists 34 museums and landmarks, 66 parks and trails, 194 places to eat, 5 places to stay and 7 attractions in and around town.

Highlights include Heisei International University, 加須未来館, 古河文学館 and ネーブルパーク.

About Koga

Koga (古河市, Koga-shi) is a city located in Ibaraki Prefecture, Japan. As of 1 January 2024, the city had an estimated population of 137,512 in 58,276 households and a population density of 1113 persons per km². The percentage of the population aged over 65 was 28.98%. The total area of the city is 123.58 square kilometres (47.71 sq mi).

From the Wikipedia article Koga, Ibaraki (this version), under CC BY-SA 4.0.

Things to do7

Heisei International University

School · 11.4 km

Higher education institution in Saitama Prefecture, Japan

Open in Google Maps · Wikipedia

JAおやま のぎ松原大橋直売所

Farm and orchard · 5.9 km

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Yanaka Bridge Ruins

Bridge · 6.7 km

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エニスホール (野木町文化会館)

Cinema and theater · 6.5 km

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ライブシアター栗橋

Cinema and theater · 6.4 km

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渡良瀬遊水地ウォッチングタワー

Scenic view · 6.8 km

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道の駅童謡のふる里おおとね

Farm and orchard · 6.6 km

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Museums and landmarks34

加須未来館

Museum · 7.2 km

Open in Google Maps · Wikipedia

古河文学館

Museum · 1.6 km

Open in Google Maps · Wikipedia

古河歴史博物館

Museum · 1.6 km

Open in Google Maps · Wikipedia

決壊口跡

Monument and historic site · 2.8 km

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篆刻美術館

Museum · 1.8 km

Open in Google Maps · Wikipedia

野渡貝塚

Monument and historic site · 2.6 km

Open in Google Maps · Wikipedia

栗橋関所址

Monument and historic site · 4.8 km

埼玉県指定旧跡 栗橋関跡

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3-Prefectures Boundaries (Tochigi, Gunma & Saitama)

Monument and historic site · 5.4 km

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Yanaka Village Hall Ruins

Monument and historic site · 6.4 km

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Yanaka Village Ruins

Monument and historic site · 6.0 km

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利根川治水記念碑

Monument and historic site · 4.8 km

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古河城 本丸跡

Monument and historic site · 1.9 km

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22 more on the map.

Parks, trails and playgrounds66

ネーブルパーク

Park · 3.7 km

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古河総合公園

Park · 1.6 km

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旧川ふるさと公園

Park · 3.3 km

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ゲートボール場

Park · 6.5 km

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栗橋国際カントリー倶楽部

Golf course · 4.7 km

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Children Plaza Zone

Park · 6.5 km

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Koga City ES Central Sports Park

Park · 3.3 km

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あじさい公園

Park · 4.9 km

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さつき公園

Park · 4.9 km

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だいてばこひろば

Park · 3.5 km

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とどろき公園

Park · 6.1 km

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ねむの木公園

Park · 4.5 km

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54 more on the map.

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Restaurants and cafes194

Coco's

Restaurant · Western, Japanese · 5.4 km

10:00-02:00

Open in Google Maps · 0280-54-1084

Nanokura

Restaurant · Ramen · 2.0 km

1, 古河市

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B's CAFE 石窯ダイニング

Restaurant · Italian · 3.0 km

10:30-24:00

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Komeda's Coffee

Cafe · Coffee Shop · 2.3 km

Mo-Su 07:00-22:00

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アップス

Bar and pub · 1.9 km

Open in Google Maps · 0280324713

ジョティ

Restaurant · Indian · 2.0 km

26, 古河市

Open in Google Maps · +81-280-32-5994

幸楽苑 古河店

Restaurant · Japanese · 2.3 km

Mo-Su 08:00-21:45

Open in Google Maps

麺堂稲葉

Restaurant · Ramen · 3.9 km

Open in Google Maps · +812-8048-6676

Bamiyan

Restaurant · Chinese · 6.0 km

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Baskin-Robbins

Ice cream · Ice Cream · 3.1 km

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Coco's

Restaurant · Western, Japanese · 0.6 km

Open in Google Maps

Coco's

Restaurant · Western, Japanese · 3.4 km

Open in Google Maps

182 more on the map.

History

Koga was settled in the Jōmon period and already known as a ferry port on the Watarase River in the Nara period and is mentioned in the Man'yōshū. During the Heian period it was the site of an iron smelter and kilns for production of ceramics and roof tiles and was one of the largest centers for iron production in eastern Japan . During the Muromachi period it was the location of the Koga kubō, a secondary government created by the Ashikaga shogunate to rule eastern Japan. In the Sengoku period, it developed into a castle town and during the Edo period became the seat of the daimyō of Koga Domain under the Edo period Tokugawa shogunate and a station on the Nikkō Kaidō highway.

The town of Koga was established on April 1, 1889, with the creation of the modern municipalities system. It was raised to city status on August 1, 1950. On September 12, 2005, Koga absorbed the towns of Sanwa and Sōwa (both from Sashima District) to create the new and expanded city of Koga. The new city hall is now located at the former town of Sōwa.

From the History section of Koga, Ibaraki on Wikipedia, under CC BY-SA 4.0.

Where to stay5

Churches and places of worship80

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Shopping49

Gas and EV charging16

Schools, colleges and libraries58

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Healthcare57

Map of Koga

250 places. The map loads OpenStreetMap tiles when you open it.

Getting there and nearby towns

Yokota Air Base (OKO) is the nearest airport with scheduled flights listed in OpenStreetMap, 59 km away.

  • Ōta 34 km northwest, about 34 min by car
  • Nagareyama 40 km southeast, about 40 min by car
  • Kashiwa 43 km southeast, about 43 min by car
  • Matsudo 48 km south, about 48 min by car
  • Kamagaya 53 km southeast, about 53 min by car
  • Tokyo 55 km south, about 55 min by car
  • Inzai 56 km southeast, about 56 min by car
  • Yachiyo 62 km southeast, about 1 h by car
  • Narashino 63 km southeast, about 1 h by car
  • Takasaki 65 km west, about 1 h by car

Drive times are estimates from straight-line distance, not routes.

Reviews, tips and questions

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Sources and licences

Photo credits

Page built November 4, 2026. Spotted a mistake? Tell us or suggest a place.