Discover the culture, settlements and genetic ancestry of Japan’s Middle Jomon communities, around 3400–2400 BC.
📍 RegionJapan
🧬 Closest modern matchJapanese-Brazilian
⏳ Time periodMiddle Jomon · c. 3400–2400 BC
Who were the Middle Jomon people?
The Middle Jomon period, roughly 3400–2400 BC, was a time of flourishing villages and elaborate pottery in prehistoric Japan. Communities lived by fishing, hunting and gathering, drawing on the forests, rivers and coasts of the archipelago. Central and eastern Honshu were especially important centres of settlement. This was thousands of years before the spread of wet-rice farming and the rise of the Japanese state.
Region and way of life
Jomon life varied with the landscape. Coastal communities gathered shellfish and caught fish, while woodland supplied nuts, timber and game. Settlements could remain occupied for generations, with houses, food-storage pits and burial grounds forming part of the same inhabited landscape.
Sannai Maruyama in northern Honshu gives a particularly clear picture of this world. Occupied from about 3900 to 2200 BC, it contained roads, houses, storage facilities and rows of graves. Chestnuts, walnuts, fish and animal remains show how its inhabitants combined food from the surrounding woodland and waters.
Middle Jomon potters produced some of prehistoric Japan’s most elaborate ceramics. In the Shinano River basin of present-day Niigata, vessels had dramatic rims shaped like rising flames. Their decoration did not prevent everyday use: food residues show that these pots were used for boiling.
Communities also maintained connections over considerable distances. Jade, obsidian and asphalt reached Sannai Maruyama from other regions. Baskets, lacquerware and carved objects reveal a wide range of crafts, while the site’s many clay figurines point to ceremonies repeated over generations.
Jomon ancestry represents a deeply diverged branch of East Eurasian ancestry. Ancient genomes indicate that the ancestors of Jomon communities separated early from populations ancestral to many later mainland East Asians, followed by a long period of relative isolation in the Japanese archipelago.
Genetic continuity extended across much of the Jomon period, even as pottery styles and settlements changed. Research also identifies regional variation within that shared ancestry. Maternal lineages such as N9b were more frequent in eastern Jomon communities, while M7a was more common in the west.
Jomon ancestry remained part of Japan’s population after migrants from the continent brought new ancestry and farming traditions during the Yayoi period. Further migration during the Kofun period helped shape the ancestry of later Japanese populations. The 2021 genomic study describes these as three major ancestral contributions: Jomon, Northeast Asian and East Asian.
The Middle Jomon profile therefore represents an earlier layer of the archipelago’s genetic history, before those later continental contributions. Comparing it with present-day Japanese references shows the relationship between that ancient ancestry and the populations that formed afterward.
In the World Genetics modern G25 comparison, the closest non-self match for Japan Jomon Middle is Japanese-Brazilian. Other nearby references include Ryukyuan, Aeta, Agta, and Japanese. This gives the Japan Jomon Middle profile its nearest modern genetic context inside the current reference database.
Closest Matches
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What does Japan Jomon Middle ancestry look like?
The breakdown models the Middle Jomon profile using the ancient reference components in the selected calculator. In the Paleolithic view, Northern East Asian is the largest component, followed by Ancient Ancestral South Indian. These broad references approximate the distinctive Jomon genetic profile; their percentages are model estimates, rather than a literal mixture of migrants from the places in their names. Use the calculator selector to compare how different reference sets describe the same ancestry.
Ancestral Breakdown
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Where is Japan Jomon Middle DNA closest on the map?
The heatmap gives the Japan Jomon Middle profile a geographic shape. Warmer areas mark regions where available modern reference populations sit closer to the Japan Jomon Middle average, while cooler areas represent more distant matches.
What populations are genetically closest to Japan Jomon Middle?
The closest non-self match in this World Genetics comparison is Japanese-Brazilian. Other nearby references include Ryukyuan, Aeta, Agta, and Japanese.
Is Japan Jomon Middle DNA closest to Japanese-Brazilian?
In the current modern G25 reference set, Japanese-Brazilian is the closest listed match to the Japan Jomon Middle average after removing Japan Jomon Middle itself from the table.
What does the Japan Jomon Middle heatmap show?
The heatmap shows where modern reference populations are closer or farther from the Japan Jomon Middle G25 average, giving the closest-match results a geographic view.
