Watch enough war stories and eventually a very practical question appears:
The battle ends. The surviving armies leave. The winners move on to rewards and politics.
Who deals with all the bodies left on the field?
There was no universal “battlefield cleanup crew” waiting behind the army with a cart and a checklist. In Japan’s Sengoku period, disposal and burial could involve people ordered by the victorious side, laborers experienced in earthworks, local residents, landholders, monks, and temples. When organized disposal failed, some bodies could remain exposed.
Sekigahara makes this question unusually concrete, because the post-battle burials are still part of the modern landscape.
Once you know what the kubizuka are, an ordinary walk near the station and railway tracks can suddenly feel very different.
0. The short answer: a war does not end when the fighting stops
A battlefield does not clean itself.
A reference case compiled by Gifu City Library from published works on Sengoku warfare describes local notables, farmers, and earthwork laborers known as kurokawamono as people who could be involved in handling the dead. Monks attached to armies or nearby temples could also conduct memorial rites.
That does not mean every battle in Japan had the same standardized system.
The point is almost the opposite: the practical aftermath depended on who controlled the area, how large the fighting had been, whether order had been restored, and who still had to live on that land.
For soldiers, the battle might last a day.
For local residents, the cleanup started the next morning.
1. So who actually removed the bodies?
There was no single answer.
Historical explanations and local records point to several possible actors:
- local lords or officials ordered to deal with the battlefield;
- laborers accustomed to digging and construction work;
- nearby residents and local notables;
- monks and temples responsible for memorial services.
It is tempting to simplify this into “the kurokawa units did it,” but that would turn a varied practice into a fictional nationwide service.
The hard reality is simpler.
Someone had to dig. Someone had to move bodies. Someone had to restore roads and fields. Someone had to conduct rites.
The one-line chronicle entry “the defeated army fled” hides a huge amount of unpleasant physical work.
2. Some were buried together; others could be left exposed
Not every fallen soldier received an individual grave.
The reference literature summarized by Gifu City Library describes collective burials in large pits, as well as cases in which bodies were stripped of useful weapons or clothing and left exposed when organized disposal did not occur.
That sounds brutal because it was brutal.
But the battlefield was not an abstract historical site to the people living nearby. It might have been their farmland, road, village edge, or water source.
They needed the land back.
So postwar work could mean clearing bodies, restoring fields, reopening routes, and carrying out rites for the dead.
The army could move on.
The landscape could not.
3. Why were heads treated separately? Head-taking and head inspection
One feature of Sengoku warfare is especially difficult for modern readers: the treatment of heads as proof of battlefield achievement.
Enemy heads could be taken and later presented for inspection. The official Sekigahara battlefield guide states that a head inspection was held after the battle at Tokugawa Ieyasu’s final headquarters.
So one possible sequence was:
death in battle, head taken as evidence, formal inspection, then burial and memorialization.
This is why the word kubizuka — literally “head mound” — appears.
But do not imagine it as a neat container holding only heads.
Sekigahara’s West Kubizuka is also known as the dozuka, or “body mound.” Official descriptions say Takenaka Shigekado buried the war dead and created two kubizuka, one east and one west.
It is better understood as a collective burial site for people killed in the battle.
4. Sekigahara is unusually specific: Takenaka Shigekado built two burial mounds
This is not merely “an old battlefield, so bodies were probably buried somewhere.”
According to the Gifu Sekigahara Battlefield Memorial Museum, on the day after the battle Tokugawa Ieyasu ordered Takenaka Shigekado to deal with the war dead left on the battlefield, along with other restoration work.
Shigekado buried the dead and established two kubizuka.
Both the East and West Kubizuka remain historical sites today.
That is the moment when the phrase “old battlefield” stops being abstract.
A field is one thing.
“A place where bodies collected after the battle were buried” is another.
The soil suddenly comes with documentation.
5. Then railway construction found many human bones
The official Sekigahara tourism page for the West Kubizuka gives the detail that makes the story jump forward into modern times.
The mound today is about two meters high and roughly thirty meters around.
During construction of the JR Tokaido Main Line, many human bones from the burial were reportedly uncovered. The site is therefore thought to have once been considerably larger.
Imagine the work sequence.
Dig for a railway. Hit bone. Keep digging. Find more bone.
The seventeenth-century battlefield aftermath has just entered a modern civil-engineering project.
It is easy to make a ghost joke here. “How did nobody get haunted?”
But the documented part is already enough: there was a burial site, railway work exposed many bones, and the site continued to be treated as a place of memorialization.
No paranormal claim is required.
6. Why Sekigahara can feel eerie at night: the modern town overlaps the battlefield
Sekigahara is not a battlefield sealed inside a distant archaeological park.
The modern town occupies the same space.
The official guide notes that Matsudaira Tadayoshi and Ii Naomasa were positioned around the area of today’s JR Sekigahara Station.
Nearby are former encampments, the decisive battlefield, the site of Ieyasu’s head inspection, burial mounds, roads, homes, and railway tracks.
In daylight, much of it looks calm and rural.
At night, once you know the history, the mental map changes.
Instead of “that grove looks creepy,” the thought becomes:
“Wait. This entire area was part of the battlefield.”
That is a different kind of fear.
The atmosphere is no longer powered only by imagination. It has a documented historical layer underneath it.
7. “Were there ambushes in that forest?” Be careful — but the hills really were military terrain
This is where historical imagination can outrun the evidence.
The forest you see today is not necessarily the forest that existed in 1600. Vegetation, paths, fields, and land use have changed over more than four centuries.
So pointing at a modern stand of trees and saying, “There definitely were hidden troops right there,” requires evidence.
Still, the surrounding heights absolutely mattered militarily.
Ishida Mitsunari occupied Mount Sasao, a position overlooking Sekigahara and controlling the Hokkokukaido route. Kuroda Nagamasa and Takenaka Shigekado occupied Okayama, a 164-meter hill with a view of the battlefield. Kobayakawa Hideaki occupied Mount Matsuo, about 293 meters high, overlooking the main battlefield.
So the feeling that “troops could have been up in those hills” is not absurd.
The correct distinction is:
documented deployment is history; a specific hidden ambush in a specific modern grove is speculation.
Keeping those separate makes the story more interesting, not less.
8. The unsettling part may be the history of an ordinary landscape, not ghosts
Sekigahara does not need a supernatural upgrade.
There is an ordinary station. An ordinary railway. Fields. Hills. Roads.
But in 1600 a major battle took place across that landscape. Heads were inspected. The next day, disposal of the dead was ordered. Burial mounds were created.
Centuries later, railway construction at the West Kubizuka reportedly uncovered many human bones.
Once you know that, the same landscape reads differently.
By day:
“What a peaceful rural town.”
By night:
“Right. People actually fought and died around here.”
Learning history is not only memorizing dates.
Sometimes it changes what the ground means.
The eerie part of an old battlefield begins before any ghost story:
people really fought here, people really died here, and someone had to come back the next day and deal with what was left.
Today, trains run through that same landscape.
References (6)
- Gifu City Library / Collaborative Reference Database, “How were bodies handled on Sengoku-period battlefields?” https://crd.ndl.go.jp/reference/entry/reference/show?id=1000355369
- Gifu Sekigahara Battlefield Memorial Museum, “Tokugawa Ieyasu Course” https://sekigahara.pref.gifu.lg.jp/tokugawa-ieyasu/
- Gifu Sekigahara Battlefield Memorial Museum, “Otani Yoshitsugu Course” https://sekigahara.pref.gifu.lg.jp/otani-yoshitsugu/
- Sekigahara Tourism Guide, “West Kubizuka” https://www.sekigahara1600.com/spot/nishikubizuka.html
- Gifu Sekigahara Battlefield Memorial Museum, “Kuroda Nagamasa Course” https://sekigahara.pref.gifu.lg.jp/kuroda-nagamasa/
- Gifu Sekigahara Battlefield Memorial Museum, “Kobayakawa Hideaki Course” https://sekigahara.pref.gifu.lg.jp/kobayakawa-hideaki/
