Megalithic mound (tumulus with integral stones)
Kabutoyama Kofun
Datedc. 401–500 CE
Photo 藤谷良秀 · CC BY-SA 4.0Source file on Wikimedia Commons
Overview
About this site
What the sources say
The Kabutoyama Kofun (兜山古墳) is kofun burial mound located in the Shimmeicho neighborhood of the city of Sabae, Fukui, in the Hokuriku region of Japan. It was designated a National Historic Site of Japan in 1977.
Read on Wikipedia3 min readCC BY-SA 4.0
Where it sits in time
The site's dated range, placed against world reference points.
The scale is logarithmic: each step to the left is about ten times older than the last.
The full article
Kabutoyama Kofun: the whole story
In briefSources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
Sources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
Kabutoyama Kofun is a large circular burial mound in the Shimmeicho neighborhood of Sabae, Fukui, in Japan's Hokuriku region. It stands on a hillside north of the centre of Sabae and was designated a National Historic Site of Japan in 1977.
The mound is crowned by a small Hachiman shrine. Built in two layers, it measures 70 meters across at its base, 49 meters across at its upper tier, and eight meters in height. A circumferential moat surrounded the mound; a small part survives in the northeastern sector. No fukiishi or cylindrical haniwa have been found in the area.
Excavation surveys of the mound's edge were carried out in 1984, 1991 and 2001. They identified a circumferential moat about 17 meters wide and an enclosed area more than 90 meters in diameter. The interior has not been excavated, so the burial chamber remains unknown. From the mound's form, it is estimated to date from the 5th century AD.
Kabutoyama Kofun appears in no historical records, and the name and rank of the person buried within are unknown. It is the largest circular-type kofun found in Fukui Prefecture and the largest of many similar mounds in an area inhabited since the Yayoi and Kofun periods. Its scale suggests that it may have served as the tomb of a local chieftain or another important person.
The tumulus is constructed in two layers, with an overall diameter of 70 meters at its base, 49 meters at its upper tier, and eight meters in height.
OverviewSources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
Sources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
The Kabutoyama Kofun is a circular-type tumulus (empun (円墳)) located on a hillside north of the centre of the city of Sabae. It is orientated east, and is crowned with a small Hachiman shrine. The tumulus is constructed in two layers, with an overall diameter of 70 meters at its base, 49 meters at its upper tier, and eight meters in height. The periphery of the mound was surrounded by a circumferential moat 15 meters in width, of which a small portion survives in the northeastern sector. It is the largest circular-type kofun found in Fukui Prefecture. No fukiishi or cylindrical haniwa have found in the area, and the details of the burial chamber are unknown, as the interior of the tumulus has not been excavated; however, from the morphology of the mound it is estimated to date from the 5th century AD. An excavation survey of the hem of the mound was carried out in 1984 and 1991 and 2001, and it became clear that a circumference moat with a width of about 17 meters encircles the mound, and the area enclosed over 90 meters in diameter
The tumulus does not appear in any historical records and the name of rank of the person buried within is unknown. It is the largest of many similar kofun which have been discovered in the area, which has been densely populated since the Yayoi and Kofun periods, and from its scale it must have been the tomb of a local chieftain or other person of importance. It is located about a five-minute walk from Shinmei Station on the Fukui Railway.
How this page was madeSources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
Sources for this section
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
The summary at the top of this page was written by MiniMax-M3 (2026-11-08) from the cited Wikipedia article “Kabutoyama Kofun”. The numbers in it were checked automatically against the source text. The rest of the page is the article itself, the structured records and computed distances.
Tradition and region
About this kind of monument
Japanese kofun tumuli
Kofun are the great burial mounds of ancient Japan, built mainly between the middle of the third century and the early seventh century CE. The period takes its name from them. The most distinctive form is the keyhole-shaped mound (zempō-kōen-fun), with one square end and one round end seen from above, but there are also plain round mounds, double-rectangle mounds and square mounds. Orientation is not fixed: in the Mozu group at Sakai, some round parts face north and others east.
The largest is Daisenryō kofun at Sakai in Osaka, the biggest kofun in Japan, thought to have been built over some twenty years in the middle of the fifth century. By common acceptance it is the tomb of Emperor Nintoku, and the Imperial Household Agency treats it as such, but this cannot be confirmed because the mound has not been excavated. It stands in the Mozu group, which once had more than a hundred tombs of which fewer than half remain; the group and the neighbouring Furuichi cluster were inscribed on the UNESCO World Heritage List in 2019. The mounds were built on a plateau overlooking Osaka Bay, near the ancient coastline.
Dating rests on mound shape, pottery and grave goods. Haniwa, which means "clay circle", are terracotta cylinders and figures of houses, animals and people that were arranged in rings and rows around and on top of the mounds. Smaller kofun are very numerous and sit in groups in every region of Japan.
When visiting, look for the moat that surrounds the larger mounds, for the stepped outline of terraces, and for reconstructed haniwa in museums and parks beside the tombs.
Paraphrased from Wikipedia: Kofun, Wikipedia: Daisen Kofun, Wikipedia: Haniwa, Wikipedia: Mozu Tombs · CC BY-SA 4.0
From the article
Dated moments in the story
- 1977
It was designated a National Historic Site of Japan in 1977.
Source - 1984
An excavation survey of the hem of the mound was carried out in 1984 and 1991 and 2001, and it became clear that a circumference moat with a width of about 17 meters encircles the mound, and the area enclosed over 90 meters in diameter The tumulus does not appear in any historical records and the name of rank of...
Source
See it in 3D
An interpretive reconstruction of the monument, standing on the real ground at its exact point, under the sun for that place and season. Drag to look around it.

The reconstruction is ours, not a survey: it shows what a monument of this type looks like, at the size the record gives for this one.
Photographs
3 photographs, each with its author and licence
More photographs
Lore
Evidence & Lore
What the sources actually support — and, kept apart, what has been claimed.
What the evidence supports
Dates
Est. 4000–1200 BCEHow this date was established: Type comparisonTypological estimate, not a date for this site: a megalithic mound in Japan is normally dated between 4000 BCE and 1200 BCE (Atlas typological table).Source for this date
Measured facts
- Location
- Shimmeicho neighborhood, Sabae, FukuiSource: Location
- Region
- HokurikuSource: Region
- Designation year
- 1977Source: Designation year
- Heritage designation
- Historic Site of JapanSource: Heritage designation
Where it stands
Japan
The pin marks the monument itself — its exact point.
- Coordinates
- 35°58′28″ N, 136°11′00″ EFor a GPS or map app: 35.97444, 136.18336
Access is as our sources describe it; we have not visited the site to check.
Nearby
The closest sites in the Atlas, by straight line.
Sources
Every record behind this page, with the link it came from.
2 sources behind this page
- 01Wikidata Q17990172wikidata.org
- 02Wikipedia (en)en.wikipedia.org
Image files
Report a correctionWrong date, name, photograph or source? Tell us and it will be put right.
Around this place
The ten nearest sites, by compass
Credit
Text, licence and sources
Text from the Wikipedia article "Kabutoyama Kofun" (English), licensed CC BY-SA 4.0; authors are listed in the page history. Reused under CC BY-SA 4.0. Read on Wikipedia · Edit history and authors
- Wikipedia (English): Kabutoyama KofunCC BY-SA 4.0
- Wikidata Q17990172CC0