| Naganohara | |
| Native Name Lang: | ja |
| Settlement Type: | Town |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | |
| Coordinates: | 36.5523°N 138.6543°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kantō |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Gunma |
| Subdivision Type3: | District |
| Subdivision Name3: | Agatsuma |
| Leader Title: | Mayor |
| Area Total Km2: | 133.85 |
| Population Total: | 5495 |
| Population As Of: | January 2020 |
| Population Density Km2: | auto |
| Timezone1: | Japan Standard Time |
| Utc Offset1: | +9 |
| Blank Name Sec1: | City Symbols |
| Blank1 Name Sec1: | - Tree |
| Blank1 Info Sec1: | Japanese Larch |
| Blank2 Name Sec1: | - Flower |
| Blank2 Info Sec1: | Azalea |
| Blank3 Name Sec1: | - Bird |
| Blank3 Info Sec1: | Copper pheasant |
| Blank Name Sec2: | Phone number |
| Blank Info Sec2: | 0279-82-2244 |
| Blank1 Name Sec2: | Address |
| Blank1 Info Sec2: | 66-3 Naganohara, Naganohara-machi, Agatsuma-gun, Gunma-ken 377-1392 |
thumb|right|250px|New Naganohara town officethumb|right|250px|Festival at Kawahara onsen is a town located in Gunma Prefecture, Japan.
, the town had an estimated population of 5,495 in 5630 households,[1] and a population density of 41 persons per km².
The total area of the town is 133.85sqkm. The controversial Yamba Dam project is located within Naganohara.[2]
Located in the northwestern portion of Gunma Prefecture, almost all of Naganohara has an elevation higher than 500 meters. The town has Mount Kusatsu-Shirane (2171m) to the north and Mount Asama (2568m) to the south.
Naganohara has a Humid continental climate (Köppen Cfa) characterized by warm summers and cold winters with heavy snowfall. The average annual temperature in Naganohara is 7.6 °C. The average annual rainfall is 1453 mm with September as the wettest month. The temperatures are highest on average in August, at around 20.4 °C, and lowest in January, at around -4.7 °C.[3]
Per Japanese census data,[4] the population of Naganohara has declined over the past 70 years.
The area of present-day Naganohara has human remains from the Japanese Paleolithic through Jōmon periods, although archaeological findings from the Kofun period are scarce compared with surrounding areas. During the Edo period, the area was part of the hatamoto-administered territory within Kōzuke Province.
Naganohara Town was created within Agatsuma District of Gunma Prefecture on April 1, 1889, with the creation of the modern municipalities system after the Meiji Restoration.
Naganohara has a mayor-council form of government with a directly elected mayor and a unicameral town council of 10 members. Naganohara collectively with the other municipalities in Agatsuma District, contributes two members to the Gunma Prefectural Assembly. In terms of national politics, the town is part of Gunma 5th district of the lower house of the Diet of Japan.
The economy of Naganohara is heavily dependent on agriculture.
Naganohara has four public elementary schools and two public middle schools operated by the town government, and one public high schools operated by the Gunma Prefectural Board of Education.