1001 Smart Cities
🇯🇵 Fujisawa

Fujisawa Sustainable Smart Town

🤖 AI-generated summary · ◆ 14 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

14 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Every home in this 19-hectare Panasonic district has solar and battery storage on a shared grid. The operator reports it hit its 70% CO2 and 30% water targets — the only one who has measured them.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byFujisawa SST Council (Panasonic-led consortium of ~18 companies)
Scale🏘️ District

Part of 1001 Smart Cities — 1,216 documented projects · 🏙️ Fujisawa city profile · ☀️ Solar & PV guide · ⚡ Energy projects

Panasonic-led Fujisawa SST turned a 19-hectare former factory site southwest of Tokyo into a district planned for up to 1,000 households (about 566 built and roughly 2,000 residents by the mid-2020s), where each home has solar panels and battery storage tied to a shared area energy-management system. A decade in, the operator reports it has hit its original environmental targets, though the figures are self-reported, not independently audited.

Live 📅 since 2014

📊 Impact

Fujisawa SST / Panasonic report a 70% cut in CO2 emissions versus a 1990 baseline and a 30% cut in household water use versus a 2006 equipment-standard baseline, plus a renewable-energy utilisation rate above 30% — all self-reported by the operator, with no independent audit located. Neither publishes how the figures were measured. When the developers declared the town complete in October 2024, they set a new target of a further 50% CO2 cut by fiscal 2034 against the town's actual fiscal-2020 figure; 566 dwellings had been built against the roughly 1,000 homes and 3,000 residents planned in 2013.

🎓 Lesson

A developer-led 'sustainable town' can hit ambitious targets on paper — but when the developer that built it is also the only party measuring the results, the numbers are closer to a company report than an independent evaluation.

⚡ EnergySolar & PVSmart grid & energyWaterSmart districts

Sources

↗ Fujisawa SST (operator)Official site of the town: describes Fujisawa SST as a joint public-private project of partner companies and Fujisawa City, run by the Fujisawa SST Management Company and Consortium.
↗ Panasonic Newsroom (developer)Published 19 March 2025Panasonic's ten-year story: some 2,000 people live in 566 dwellings; says the town met its original targets of a 70% CO2 cut against 1990 levels and a 30% cut in household water use against the 2006 standard of household equipment, with a renewable-energy utilisation rate above 30%; no measurement method is given.
↗ Atlas of Urban Tech (research)Cornell Tech student case study: every house has solar panels and batteries linked to a community energy-management system; lists the 70% CO2 and 30% water figures as aims.
↗ Fujisawa SST – Overall targets and guidelinesThe operator's targets page: the 70% CO2 target (versus 1990) set at the 2014 opening 'has been achieved'; the next goal is measured from the town's actual figure for fiscal 2020; distinguishes the renewable-energy utilisation ratio from the new self-consumption ratio target.
↗ Panasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking releasePublished 19 September 2013Groundbreaking release for the detached-housing zone: a 19-hectare former Panasonic factory site, about 1,000 homes (about 600 detached, about 400 apartments), planned population 3,000, total project cost about ¥60 billion, completion planned for fiscal 2018; overall targets of 70% CO2 cut (vs 1990), 30% household water cut (vs 2006) and over 30% renewable-energy use.
Show 1 more sourcesShow fewer
↗ Panasonic – Fujisawa SST completion and updated targets releasePublished 23 October 2024Panasonic release marking the town's completion at ten years: the 70% CO2 cut versus 1990 and the over-30% renewable-energy utilisation rate are described as already achieved; new targets of a further 50% CO2 cut by fiscal 2034 against the fiscal-2020 actual figure and a 60% renewable self-consumption rate.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2014. 3 of 6 sources carry a publication date, from 19 September 2013 to 19 March 2025.

When the sources were published

  1. Panasonic Homes · vendorPanasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking release
  2. Panasonic · vendorPanasonic – Fujisawa SST completion and updated targets release
  3. Panasonic · vendorPanasonic Newsroom (developer)

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 14 claims with their sources · the forensic record

Evidence file · public beta 14 addressable claims, 6 source dossiers, one permanent baseline. The file is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 14

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-e124f7eaf6498bf3 quantitative
Panasonic-led Fujisawa SST turned a 19-hectare former factory site southwest of Tokyo
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The 2013 release places the project on a roughly 19-hectare former Panasonic group factory site in southern Fujisawa; the town's site names the partner companies and Fujisawa City.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking release
  2. Fujisawa SST (operator)
Claim 2 clm-97de65b396e3aa92 quantitative
into a district planned for up to 1,000 households
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The 2013 release plans about 1,000 homes: about 600 detached houses and about 400 apartments.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking release
Claim 3 clm-8d5981888c0efd2c quantitative
about 566 built and roughly 2,000 residents by the mid-2020s
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Panasonic's March 2025 story says some 2,000 people live in 566 smart-town dwellings.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
Claim 4 clm-c9530f5e9987a91e descriptive
where each home has solar panels and battery storage tied to a shared area energy-management system
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The case study says all houses have solar panels and batteries and are linked to the Community Energy Management System.
Caveat
Panasonic's own story mentions HEMS for single-family homes; the apartments' equipment is not described.

Sources carrying this claim

  1. Atlas of Urban Tech (research)
Claim 5 clm-60a99d1a012665f1 descriptive
A decade in, the operator reports it has hit its original environmental targets
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Panasonic says the town has met its original environmental targets; the operator's targets page says the 70% CO2 target set at the 2014 opening has been achieved.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Fujisawa SST – Overall targets and guidelines
Claim 6 clm-b92db43de46c1ec0 descriptive
though the figures are self-reported, not independently audited
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Both statements of success come from the developer and the operator; neither names an outside verification, and none was found.
Caveat
An absence: no audit or independent study of the figures was located.

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Fujisawa SST – Overall targets and guidelines
Claim 7 clm-d7c80cfeb7bcc8c9 quantitative
Fujisawa SST / Panasonic report a 70% cut in CO2 emissions versus a 1990 baseline and a 30% cut in household water use versus a 2006 equipment-standard baseline
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Panasonic's story gives the 70% CO2 reduction against 1990 levels and the 30% household water reduction against the 2006 standard of household equipment.
Caveat
A baseline of 2006 standard household equipment suggests a design comparison rather than metered consumption; no method is published.

Sources carrying this claim

  1. Panasonic Newsroom (developer)
Claim 8 clm-4adbf32a835bbce6 quantitative
plus a renewable-energy utilisation rate above 30%
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Panasonic reports a renewable-energy utilisation rate of over 30%; the 2024 release calls the over-30% utilisation target already achieved.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Panasonic – Fujisawa SST completion and updated targets release
Claim 9 clm-a7584ca8415c3c86 descriptive
all self-reported by the operator, with no independent audit located
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Every statement of the results comes from Panasonic or the operator; searches for an audit or independent study returned none.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Panasonic – Fujisawa SST completion and updated targets release
Claim 10 clm-dcef15661d529bf7 descriptive
Neither publishes how the figures were measured
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The targets page and the Panasonic story state that the targets were achieved but give no measured value, scope or calculation method.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Fujisawa SST – Overall targets and guidelines
  2. Panasonic Newsroom (developer)
Claim 11 clm-57f8b8e0ca9c4869 quantitative
When the developers declared the town complete in October 2024, they set a new target of a further 50% CO2 cut by fiscal 2034 against the town's actual fiscal-2020 figure
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The October 2024 release marks the town's completion and sets a further 50% CO2 cut by fiscal 2034 against the town's fiscal-2020 actual figure.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic – Fujisawa SST completion and updated targets release
Claim 12 clm-dd934a6301e0000d quantitative
566 dwellings had been built against the roughly 1,000 homes and 3,000 residents planned in 2013
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Panasonic counts 566 dwellings in 2025; the 2013 release planned about 1,000 homes and a population of 3,000.
Caveat
The plan may have changed the housing mix (a senior residence and other facilities were added); no source explains the difference.

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Panasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking release
Claim 13 clm-1b355478cedba25b descriptive
A developer-led 'sustainable town' can hit ambitious targets on paper
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The developer and operator state that all original targets were met.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Fujisawa SST – Overall targets and guidelines
Claim 14 clm-8c280e63bff041d5 descriptive
but when the developer that built it is also the only party measuring the results, the numbers are closer to a company report than an independent evaluation
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
All published results come from Panasonic or the Panasonic-led operator, without a measurement method; no outside evaluation was found.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Panasonic Newsroom (developer)
  2. Panasonic – Fujisawa SST completion and updated targets release
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-10-14-baseline effective 2026-10-14 · created 2026-10-14

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:73f11dcdb10895d96a60567290d648f21def3847848b0afb71558b8192513d18
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
14
of 14 claims mapped
6
source dossiers
3
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Fujisawa SST Council (Panasonic-led consortium of ~18 companies)
Actor types
private
Funding model
mixed
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

Fujisawa SST (operator) fujisawasst.com · 1 linked claim

Open original source ↗

Stable source ID
src-4a9960b78bf47fab
Publisher
Name not classified · fujisawasst.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official site of the town: describes Fujisawa SST as a joint public-private project of partner companies and Fujisawa City, run by the Fujisawa SST Management Company and Consortium.

Descriptive only — not page/paragraph exact
Claims linked
Panasonic Newsroom (developer) news.panasonic.com · 10 linked claims

Open original source ↗

Stable source ID
src-0a0646b936840688
Publisher
Name not classified · news.panasonic.com
Type / language
web-page · language not classified
Published
2025-03-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Panasonic's ten-year story: some 2,000 people live in 566 dwellings; says the town met its original targets of a 70% CO2 cut against 1990 levels and a 30% cut in household water use against the 2006 standard of household equipment, with a renewable-energy utilisation rate above 30%; no measurement method is given.

Descriptive only — not page/paragraph exact
Claims linked
Atlas of Urban Tech (research) atlasofurbantech.org · 1 linked claim

Open original source ↗

Stable source ID
src-69c780b6b2f7d309
Publisher
Name not classified · atlasofurbantech.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Cornell Tech student case study: every house has solar panels and batteries linked to a community energy-management system; lists the 70% CO2 and 30% water figures as aims.

Descriptive only — not page/paragraph exact
Claims linked
Fujisawa SST – Overall targets and guidelines fujisawasst.com · 4 linked claims

Open original source ↗

Stable source ID
src-72a06a785ae9ed03
Publisher
Name not classified · fujisawasst.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The operator's targets page: the 70% CO2 target (versus 1990) set at the 2014 opening 'has been achieved'; the next goal is measured from the town's actual figure for fiscal 2020; distinguishes the renewable-energy utilisation ratio from the new self-consumption ratio target.

Descriptive only — not page/paragraph exact
Claims linked
Panasonic Homes & Mitsui Fudosan Residential – detached-housing zone groundbreaking release homes.panasonic.com · 3 linked claims

Open original source ↗

Stable source ID
src-cade63e35586ccb1
Publisher
Name not classified · homes.panasonic.com
Type / language
web-page · language not classified
Published
2013-09-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Groundbreaking release for the detached-housing zone: a 19-hectare former Panasonic factory site, about 1,000 homes (about 600 detached, about 400 apartments), planned population 3,000, total project cost about ¥60 billion, completion planned for fiscal 2018; overall targets of 70% CO2 cut (vs 1990), 30% household water cut (vs 2006) and over 30% renewable-energy use.

Descriptive only — not page/paragraph exact
Claims linked
Panasonic – Fujisawa SST completion and updated targets release news.panasonic.com · 4 linked claims

Open original source ↗

Stable source ID
src-713474d970d217e0
Publisher
Name not classified · news.panasonic.com
Type / language
web-page · language not classified
Published
2024-10-23
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-14
Dossier created
2026-10-14
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Panasonic release marking the town's completion at ten years: the 70% CO2 cut versus 1990 and the over-30% renewable-energy utilisation rate are described as already achieved; new targets of a further 50% CO2 cut by fiscal 2034 against the fiscal-2020 actual figure and a 60% renewable self-consumption rate.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this file
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇺🇸 Austin Energy SHINES: Solar-Storage Grid Management Pilot · Austin Different scales of storage-backed renewables: Austin coordinated batteries with solar for the grid; Fujisawa gave each home its own. 🇺🇸 Railbelt Battery Storage & Fire Island Wind Integration · Anchorage Both pair batteries with renewables at opposite scales: Fujisawa's are per-home; Anchorage's Megapack backs up the whole city grid. 🇯🇵 Tsunashima Sustainable Smart Town · Yokohama Same developer, seven kilometres apart: Fujisawa sells residents a way of living, Tsunashima sells companies a place to test one.

Explore the wider context

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📎 Cite this project

1001 Smart Cities (2026). “Fujisawa Sustainable Smart Town” — Fujisawa, Japan. The Smart City Atlas. https://1001smartcities.org/projects/fujisawa-sst/ (last verified 2026-10-14). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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