| Atsuma | |
| Native Name Lang: | ja |
| Settlement Type: | Town |
| Seal Type: | Emblem |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 42.7236°N 141.8778°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Hokkaido |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Hokkaido (Iburi Subprefecture) |
| Subdivision Type3: | District |
| Subdivision Name3: | Yūfutsu |
| Extinct Title: | Now part of |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 404.56 |
| Population Total: | 4,659 |
| Population As Of: | March 31, 2017 |
| Population Density Km2: | auto |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
| Blank Name Sec2: | Climate |
| Blank Info Sec2: | Dfb |
is a town located in Iburi Subprefecture, Hokkaido, Japan. In March 2017, the town had an estimated population of 4,659, and a density of 12 persons per km2. The total area is 404.56 km2. The annual town festival is in mid-July, and is called "Inaka Matsuri" or "Country Festival". It is a two-day affair that starts in the main section of town with a parade featuring the Atsuma Dance and continuing the next day with performances at the Atsuma Dam.
There is a surfing beach nearby where the annual "Hama Matsuri" or "Beach Festival" in early-August.
Atsuma has several rivers of which the most prominent is the Atsuma River. It is dammed in the northern area of town and continues down through the center of town and empties into the ocean near the ferry terminal and the Tomato-Atsuma Power Station.
Per Japanese census data,[1] the population of Atsuma has declined over the past half-century.
In the middle of the 12th century, Northern Fujiwara supposedly had its trading post in Atsuma.[2]
On 6 September 2018, Atsuma was the town hardest hit by the 2018 Hokkaido Eastern Iburi earthquake. It caused landslides that killed several of the town's residents when their homes were buried.[3] A revitalization effort organized by the town since 2018 has attracted new residents, leading to an increase of the town's population.[4]
Atsuma currently has a high school, called the Hokkaido Atsuma High School (北海道厚真高等学校, Hokkaidō Atsuma Kōtōgakkō). The town also has two junior high schools and two elementary schools.