| Jōrakuji-Nanatsuzuka Kofun Cluster | |
| Native Name: | 浄楽寺・七ツ塚古墳群 |
| Map Type: | Japan Hiroshima Prefecture#Japan |
| Map Alt: | Location in Japan |
| Relief: | 1 |
| Map Size: | 270px |
| Altitude M: | 10 |
| Coordinates: | 34.5536°N 133.3122°W |
| Location: | Miyoshi, Hiroshima, Japan |
| Region: | San'yō region |
| Type: | kofun cluster |
| Built: | 5th-6th century AD |
| Epochs: | Kofun period |
| Public Access: | Yes |
The is a group of Kofun period burial mounds located in the Takasugi and Odasaiwai neighborhoods of the city of Miyoshi, Hiroshima Prefecture in the San'yō region of Japan. The cluster was designated a National Historic Site in 1972.[1]
The Miyoshi Basin in the Chugoku Mountains of former Bingo Province has one of the most dense concentration of burial mounds in the Chugoku region. The Jōrakuji-Nanatsuzuka cluster is one of the largest of these, and is located on a hill on the west bank of the Mihara River in the southeastern part of the Miyoshi Basin. The burial mounds are divided into north and south groups. In the Jōrakuji cluster on the north side consists of a total of 116 kofun, including one, 97, and 18 . Mound No.12. the largest in this cluster, is a circular burial mound measuring 6 meters in height and 55 meters in diameter.[2]
In the Nanatsuzuka Burial Mounds, located approximately 116 meters south, consists of a total of 60 burial mounds, including one, which is shaped like a keyhole, having one square end and one circular end, when viewed from above. It has a total length of 29.5 meters. There are also 2, 55, and two . [2]
Based on the style of the burial chambers and excavated artifacts, it is believed that these burial mounds were constructed in the middle to late Kofun period (5th to 6th centuries AD). The area around the burial mounds has been preserved and maintained as the, which houses the Prefectural Museum of History and Folklore. The site is a 15-minute walk from Kamisugi Station on the JR West Geibi Line.[2]
left|thumb|270px|Nanatsuzuka Kofun No.9