JŌMON · c. 3900–2200 BCE

Sannai-Maruyama

Large posts and dwellings of a Jōmon village

Postholes survive, but the building's height and form are a reconstruction proposal.

Museum documentation · free public access, no account required.

Six large chestnut posts in two rows of three, with three levels following an explicit museographic hypothesis; roof intentionally not reconstructed. Interpretive reconstruction, not a photograph of the original. — **INTERPRETIVE RECONSTRUCTION · AI · hypothetical elevations and roofs**
Reconstruction · Declared visual hypothesis
AI-generated reconstruction from inspected reference and archaeological sources; does not equal a photograph of the original. See limits and hypothetical parts. Photo of a modern full-scale reconstruction of a hypothesis; NOT a photograph of an original prehistoric elevation. Number of storeys and total height: follows the official three-level reconstruction, not a preserved elevation. Roof deliberately omitted; its visual absence does not prove it did not exist. Timber joints and ropes, weathered appearance, light and vegetation; no asserted ritual/military function.
OpenAI ImageGen; photographic reference: DoWhile · Generated reconstruction; public domain photographic reference
Source and provenance ↗Terms of use ↗

**INTERPRETIVE RECONSTRUCTION · AI · hypothetical elevations and roofs**
Reconstruction · Declared visual hypothesis
AI-generated reconstruction from inspected reference and archaeological sources; does not equal a photograph of the original. See limits and hypothetical parts. Photo of a modern full-scale reconstruction of a hypothesis; NOT a photograph of an original prehistoric elevation. Number of storeys and total height: follows the official three-level reconstruction, not a preserved elevation. Roof deliberately omitted; its visual absence does not prove it did not exist. Timber joints and ropes, weathered appearance, light and vegetation; no asserted ritual/military function.
OpenAI ImageGen; photographic reference: DoWhile · Generated reconstruction; public domain photographic reference
Source and provenance ↗Terms of use ↗

History and context

Sannai-Maruyama brings together semi-subterranean dwellings, post-built structures, paths, pits and storage in a prolonged occupation.

Six large postholes held monumental posts. The elevated volume that welcomes visitors today is a visual proposal, not the preserved ancient building.

Evidence and interpretation

Postholes, posts, plans and layout are documented. Height, floors and function of the large structure remain open.

Catalogue facts

Date: c. 3900–2200 BCE
Location: Aomori · Japan
Material: Timber and earth-cut structures
Caution: Hypothetical three-storey elevation

A closer look

About 1 min to read · 1 section. Further reading and sources · free access. Editorial review recorded: September 5, 2026.

Reconstructing begins with what remained underground

The postholes of the large structure preserved remains of chestnut posts around one metre in diameter. That material choice and the size of the supports are data distinct from the elevation visited today. Site documentation also shows post-built structures, funerary areas, paths and clay extraction sites. Contemplating that ensemble shifts attention from a supposed 'mysterious tower' towards the organisation of the settlement: building, burying, circulating and obtaining materials required distributing activities within a single landscape.

Heritage · Sannai-Maruyama Jomon Culture Center · official guide, 2025Access recorded: September 5, 2026.

Reference images and provenance

Documentary reference: Six enormous postholes and an elevation that remains a hypothesis. — **REFERENCE PHOTOGRAPH · DoWhile · Public domain (PD-self)**
Photo of a modern full-scale reconstruction of a hypothesis; NOT a photograph of an original prehistoric elevation.
Physical replica · Contextual correspondence
DoWhile
Image provenance Public domain (PD-self)

Sources and references

Open the institutional record and expand the object

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