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The Hideo Sasaki Foundation at a glanceMostly funded, not a grantmaker: see who funds it →

· Private foundation

The Hideo Sasaki Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$88k
Granted FY2024still arriving
23
Grants FY2024still arriving
2
States reached
$15k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0190% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Environment$87kCommunity Improvement$54kHousing & Shelter$41kArts & Culture$39kEducation$33kHuman Services$26kCivil Rights$16kPhilanthropy$15kOther$0
02FY2024 · 23 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k19 grants · $42k
  • $10k–50k4 grants · $46k
$2,000
Median grant
2
States reached
$619k
Total assets
Largest grants
RecipientAmount
TRUSTEES OF TUFTS COLLEGE$15,000
CHINATOWN COMMUNITY LAND TRUST$10,500
BOSTON PUBLIC HOUSING CORPORATION$10,000
RESIST INC$10,000
FOUR CORNERS MAIN STREET INC$5,500
SOCIEDAD LATINA INC$5,500
AYNI INSTITUTE$5,000
THE HARBORKEEPERS$5,000
EAST END HOUSE INC$3,000
FRIENDS OF BALDWIN SCHOOL INC$2,000
PROJECT RESTORE US INC$2,000
COMMUNITY ART CENTER INC$2,000
SPONSOR INC DBA MISSION EARTH$2,000
CITIZENS OF THE WORLD INC$2,000
ON THE RISE INC$1,184
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY22–24, $30k) land where the poverty rate runs at 12%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 8%BOSTON CHINATOWN NEIGHBORHOOD CENTER INC: $3k → 16%CAMBRIDGE COMMUNITY CENTER INC: $3k → 8%COMMUNITY ART CENTER INC: $2k → 8%BOSTON CHINATOWN NEIGHBORHOOD CENTER INC: $3k → 16%PROJECT RESTORE US INC: $2k → 8%ON THE RISE INC: $1k → 8%AYNI INSTITUTE: $5k → 16%AYNI INSTITUTE: $3k → 16%ON THE RISE INC: $1k → 8%CAMBRIDGE ECONOMIC OPPORTUNITY COMMITTEE INC: $1k → 8%COMMUNITY ART CENTER INC: $1k → 8%EAST END HOUSE INC: $3k → 8%EAST END HOUSE INC: $3k → 8%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

76%of every dollar goes to organizations it has funded before.
$302k · 29 repeat orgs$93k to everyone else

29 repeat relationships: 13 still active in FY2024, 16 since wound down; 10 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

29
20

Total granted

$302k
$72k

Median revenue growth · since first grant

+16%
+21%

Still filing today

72%
40%

New vs renewed · share of each year

In FY2024, 76% of grant dollars renewed an existing relationship; $21k went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24
Human ServicesEnvironmentArts & CultureCommunity ImprovementHousing & ShelterEducationOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • Trustees of Tufts College
    2× · 2023–2024 · $30k · revenue +16%
  • GB
    Give Black Alliance
    2× · 2018–2019 · $15k · revenue +831%
  • GS
    GROUNDWORK SOMERVILLE INC
    2× · 2022–2023 · $15k · revenue +62%

Funded once

  • IG
    Individual grant recipient
    one grant, 2019 · $10k
  • HE
    HOME ENERGY EFFICIENCY TEAMNATHAN PHILLIPS
    one grant, 2020 · $10k
  • BH
    BOSTON HOUSING AUTHORITY JONATHAN TARLETON
    one grant, 2019 · $10k
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
2
Central Square Theater Inc

Central square theater, the oldest female-led theater organization in greater boston, is an innovator in the non-profit arts field in collaborative leadership. cst engages over 35,000 people annually through live performance, rigorous…

Arts & Culture
3
Cambridge Chamber of Commerce

The mission of the cambridge chamber of commerce is to make cambridge a better place in which to live, to work, to do business, to visit and to study.

—
4
Alternatives for Community and Environment Inc

Ace builds the power of communities of color and low-income communities in massachusetts to eradicate environmental racism and classism, create healthy, sustainable communities, and achieve environmental justice.

Community Improvement
5
Urban Guild Inc

The corporation is organized to improve the quality of life in bostons urban communities by building capacity, environmental health, and providing economic opportunity in a manner that responds directly to community needs, interests, and…

Community Improvement
6
Greater Boston Council On Alcoholism Inc
Philanthropy
7
Boston Harbor Now Inc

Our mission is to ensure that the people of greater boston benefit from a vibrant, resilient, and inclusive waterfront, harbor, and islands; these spaces are equitable, accessible, and adapted to climate change; and to ensure our public,…

Environment
8
Southwest Boston Community Development Corporation and Affiliates

The southwest boston community development corporation is led by principles of racial equity and inclusion, to alleviate social and economic disparities that impact people's quality of life and future opportunities. it shall be led by and…

Community Improvement
9
New England Community Project Inc

Necp believes that social change happens when those most impacted by issues of systemic injustice, organize at the block level to address issues within their neighborhoods. through their involvement at a community level, residents engage…

Community Improvement
10
Cambridge Affordable Housing Corp

The organization's mission is to provide management and supporting services for related organizations which own and operate low-income housing units for qualified individuals in the city of cambridge, ma.

Housing & Shelter
11
Urban Impact Initiative Massachusetts

Urban Impact is dedicated to prioritizing the reduction of the impact of poverty for families in the Commonwealth. The organization offers a plethora of small business corporate and community opportunities. These opportunities include…

Youth Development
12
Massachusetts Affordable Housing Alliance Inc

Maha breaks down barriers facing first-time and first-generation home buyers and owners through education, counseling, advocacy, and grassroots organizing.

Housing & Shelter
How this is measured
The grantee most central to the portfolio’s shape is Third Sector New England Inc; the most unlike its peers is Theharborkeepers. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

35 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 35 of the 59 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
34/35
Grantees still filing
23/35
Grew since first funded

Where the money sits, by cause and then by grantee

Individual grant recipient: $18,000 · OtherIndividual grant recipientRESIST INC: $16,000 · OtherRESIST INCLIVABLE STREETS ALLIANCE (COLUMBIA ROAD GENDER & MOBILITY): $15,000 · OtherLIVABLE STREETS ALLIANCE (COLUMBIA ROAD GENDER & MOBILITY)Individual grant recipient: $15,000 · OtherIndividual grant recipientECONOMIC DEVELOPMENTS (CODMAN SQUARE): $15,000 · OtherECONOMIC DEVELOPMENTS (CODMAN SQUARE)THE MATTAPAN MAPPING PROJECT: $15,000 · OtherTHE MATTAPAN MAPPING PROJECTIndividual grant recipient: $10,000 · OtherHOME ENERGY EFFICIENCY TEAMNATHAN PHILLIPS: $10,000 · OtherBOSTON HOUSING AUTHORITY JONATHAN TARLETON: $10,000 · OtherYOUTH DESIGN INC: $7,000 · OtherGive Black Alliance: $15,000 · OtherGive Black AllianceTHEHARBORKEEPERS: $7,500 · Other+21 more: $51,000 · Other+21 moreTHE DOROTHY AND CHARLES MOSESIAN CENTER FOR THE ARTS INC: $15,000 · Arts & CultureTHE DOROTHY …THE CENTER FOR INDEPENDENT DOCUMENTARY INC: $15,000 · Arts & CultureTHE CENTER F…CHINATOWN COMMUNITY LAND TRUST INC: $13,000 · Arts & CultureCHINATOWN CO…+1 more: $1,000 · Arts & CultureCHARLES RIVER CONSERVANCY INC: $20,000 · EnvironmentCHARLES RIVE…CLIMABLE INC: $15,000 · EnvironmentCLIMABLE INCCONSERVATION LAW FOUNDATION INC: $3,000 · EnvironmentCONSERVATION…GREENROOTS INC: $2,500 · EnvironmentGREENROOTS I…Green Cambridge Inc: $2,000 · EnvironmentTrustees of Tufts College: $30,000 · Education+1 more: $1,000 · EducationAYNI INSTITUTE INC: $7,500 · Human ServicesEAST END HOUSE INC: $6,000 · Human ServicesBOSTON CHINATOWN NEIGHBORHOOD CENTER INC: $5,000 · Human ServicesCOMMUNITY ART CENTER INC: $3,000 · Human ServicesCAMBRIDGE COMMUNITY CENTER INC: $3,000 · Human ServicesON THE RISE INC: $2,184 · Human ServicesPROJECT RESTORE US: $2,000 · Human ServicesCAMBRIDGE ECONOMIC OPPORTUNITY COMMITTEE INC: $1,000 · Human ServicesGROUNDWORK SOMERVILLE INC: $15,000 · Community ImprovementFOUR CORNERS MAIN STREET INC: $5,500 · Community ImprovementGROUNDWORK USA INC: $1,000 · Community Improvement+1 more: $500 · Community ImprovementBOSTON PUBLIC HOUSING CORPORATION: $15,000 · Housing & ShelterHOME ENERGY EFFICIENCY TEAM INC: $5,000 · Housing & ShelterHOMEOWNER'S REHAB INC: $1,000 · Housing & Shelter
Other$204,500Arts & Culture$44,000Environment$42,500Education$31,000Human Services$29,684Community Improvement$22,000Housing & Shelter$21,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTrustees of Tufts College: $30,000 over 2y, 0.0% of budgetCHARLES RIVER CONSERVANCY INC: $20,000 over 4y, 1.8% of budgetRESIST INC: $16,000 over 2y, 0.1% of budgetGive Black Alliance: $15,000 over 2y, 4.2% of budgetGROUNDWORK SOMERVILLE INC: $15,000 over 2y, 1.6% of budgetBOSTON PUBLIC HOUSING CORPORATION: $15,000 over 2y, 2.2% of budgetCLIMABLE INC: $15,000 over 2y, 1.7% of budgetTHE DOROTHY AND CHARLES MOSESIAN CENTER FOR THE ARTS INC: $15,000 over 2y, 0.4% of budgetTHE CENTER FOR INDEPENDENT DOCUMENTARY INC: $15,000 over 2y, 0.1% of budgetCHINATOWN COMMUNITY LAND TRUST INC: $13,000 over 2y, 0.9% of budgetAYNI INSTITUTE INC: $7,500 over 2y, 0.4% of budgetTHEHARBORKEEPERS: $7,500 over 2y, 6.9% of budgetYOUTH DESIGN INC: $7,000 over 1y, 4.0% of budgetEAST END HOUSE INC: $6,000 over 2y, 0.1% of budgetFOUR CORNERS MAIN STREET INC: $5,500 over 1y, 2.8% of budgetSOCIEDAD LATINA INC: $5,500 over 1y, 0.3% of budgetHOME ENERGY EFFICIENCY TEAM INC: $5,000 over 1y, 1.0% of budgetBOSTON CHINATOWN NEIGHBORHOOD CENTER INC: $5,000 over 2y, 0.0% of budgetCONSERVATION LAW FOUNDATION INC: $3,000 over 2y, 0.0% of budgetCOMMUNITY ART CENTER INC: $3,000 over 2y, 0.1% of budgetCAMBRIDGE COMMUNITY CENTER INC: $3,000 over 1y, 0.2% of budgetGREENROOTS INC: $2,500 over 2y, 0.0% of budgetON THE RISE INC: $2,184 over 2y, 0.1% of budgetTRANSITION HOUSE INC: $2,000 over 2y, 0.0% of budgetPROJECT RESTORE US: $2,000 over 1y, 21% of budgetCAMBRIDGE CAMPING ASSOCIATION INC: $2,000 over 1y, 0.2% of budgetGreen Cambridge Inc: $2,000 over 2y, 0.5% of budgetLESLEY UNIVERSITY: $2,000 over 2y, 0.0% of budgetHOMEOWNER'S REHAB INC: $1,000 over 1y, 0.0% of budgetMIRAMELINDA MONTESSORI SCHOOL INC: $1,000 over 1y, 0.3% of budgetGROUNDWORK USA INC: $1,000 over 1y, 0.0% of budgetARTS & BUSINESS COUNCIL OF GREATER BOSTON INC: $1,000 over 1y, 0.1% of budgetCAMBRIDGE YOUNG WOMEN'S CHRISTIAN ASSOCIATION: $1,000 over 1y, 0.0% of budgetCAMBRIDGE ECONOMIC OPPORTUNITY COMMITTEE INC: $1,000 over 1y, 0.0% of budgetTHIRD SECTOR NEW ENGLAND INC: $500 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Boston Foundation IncBarr FoundationEastern Bank Foundati…United Way Of Massach…Cambridge Community F…Liberty Mutual Founda…Cambridge Savings Cha…Cummings Foundation G…Philanthropy Massachu…The Lander Family Cha…Wagner FoundationAdelard & Valeda Roy …
Boston Foundation IncMA38.5× affinity20 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Boston Foundation Inc · Barr Foundation · Eastern Bank Foundation · United Way Of Massachusetts Bay Inc · Cambridge Community Foundation · Liberty Mutual Foundation Inc · Cambridge Savings Charitable Foundation Inc · Cummings Foundation Grants Inc (Fka Oneworld Boston Inc) · Philanthropy Massachusetts Inc · The Lander Family Charitable Foundation · Wagner Foundation · Adelard & Valeda Roy Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization The Hideo Sasaki Foundation funds: left to right is the share of its income from government, bottom to top the share from The Hideo Sasaki Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 80%2%6%14%25%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 8%
  • Transition House Inc: 39% of income from government
  • On the Rise Inc: 39% of income from government
  • Boston Chinatown Neighborhood Center Inc: 38% of income from government
  • Sociedad Latina Inc: 15% of income from government
  • Cambridge Camping Association Inc: 14% of income from government
  • Community Art Center Inc: 14% of income from government
  • Trustees of Tufts College: 13% of income from government
  • Groundwork Somerville Inc: 12% of income from government
  • Arts & Business Council of Greater Boston Inc: 8% of income from government
  • Cambridge Community Center Inc: 8% of income from government
  • The Center for Independent Documentary Inc: 6% of income from government
  • Third Sector New England Inc: 3% of income from government
  • East End House Inc: 3% of income from government
  • Cambridge Young Women's Christian Association: 3% of income from government
  • Resist Inc: 2% of income from government
  • Greenroots Inc: 1% of income from government
  • Lesley University: 1% of income from government
no gov moneyreceives it· size = income
8get no government money at all
8report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Hideo Sasaki Foundation?

Find your warmest path to The Hideo Sasaki Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 59 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Hideo Sasaki’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home