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· Private foundation
This foundation does not accept unsolicited requests — it funds preselected organizations.
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 51% of THE HIDEO SASAKI FOUNDATION’s grantee dollars go to organizations outside the IRS cause taxonomy (common for large international and research funders), so a chart would be mostly “unclassified” and misrepresent the portfolio.
Beneath the NTEE codes, this is what the grant descriptions actually say.
…and in their own words, year by year
Words distinctive to each year’s grant purposes (TF-IDF) · event-driven terms in cyan.
Your grants by size, and where they go.
By grant size · FY2024
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY22–24, $30k) land where the poverty rate runs at 12% — the area typically sits at 8%. 100% of those dollars reach neighborhoods with above-average need. Most of your grants land in higher-need ZIPs.
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; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA, United Way ALICE — shown as context about the area, never attributed to your giving.
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +55% since the first grant, against +34% for the ones you funded once.
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
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 76% of grant dollars renewed an existing relationship; $21k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
Founded 131 years ago, the boston architectural college is a recognized institution providing excellence in practice-integrated design education to members of diverse communities with students representing 35 countries. the bac offers…
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,…
Engaging local business leaders in governmental and philanthropic activities, connecting and educating its members, and providing a forum for addressing the needs of the cambridge, massachusetts business community.
The corporation is organized to improve the quality of life in boston's urban communities by building capacity, environmental health, and providing economic opportunity in a manner that responds directly to community needs, interests, and…
Advocacy for the preservation of the uniquely built environment of boston, massachusetts.
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…
Helping people move to economic self-sufficiency through programs, partnerships, and advocacy.
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.
True costs initiative (tci) seeks to increase corporate accountability and to strengthen legal systems in the global south by driving collaboration among communities, funders, and creative leaders in an effort to tip the balance so…
The Brookline Arts Center is a visual arts center committed to bringing the community meaningful experience in the arts through classes, exhibitions and outreach.
We make a difference through innovative & compassionate behavioral healthcare & human services.
Partnering with individuals and organizations to access, organize, and share data that inspires action that restores our environment.
For reference, the grantee most central to the portfolio’s shape is Cambridge Community Center Inc and the most unlike its peers is Lesley University. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 30 years old; the field is 17. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 6% of your grantees by number, and just 4% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 9% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Boston Foundation Inc · Cambridge Community Foundation · Philanthropy Massachusetts Inc · Cambridge Savings Charitable · Eastern Bank Foundation · United Way Of Massachusetts Bay Inc · Cummings Foundation Grants Inc (Fka Oneworld Boston Inc) · Eastern Cambridge Foundation Inc · Liberty Mutual Foundation Inc · Albert O Wilson Foundation Inc · Gravestar Foundation · Wagner Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Every dot is one organisation THE HIDEO SASAKI FOUNDATION funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
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. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.
Through Plinth
This dossier was generated cold from public filings. In Plinth it’s a working system — every applicant assessed and every grant monitored. Here’s a taste, run on one of your grantees: PROJECT RESTORE US INC.
Agentic due diligence · confidence × risk
Limited financial data in public filings.
4 years of Form 990 filings, still active.
US 501(c)(3); EIN 872164150 on file with current IRS Form 990 filings.
Board composition & governance documents — verified live in Plinth from the applicant.
OFAC / UN sanctions screening — run live in Plinth at assessment.
Staffing, M&E and activity alignment — assessed live in Plinth from submitted proposals.
Live · Plinth’s real DD engine
Run the actual assessment on PROJECT RESTORE US INC, cold from public data.
Generated live from public IRS filings + open web sources by Plinth’s agentic engine. Shown as an illustration of the product, not a formal assessment.
Post-award monitoring · continuous checks
What you see here is static and public. In Plinth it’s operational — the full six-pillar framework on every applicant (with their own documents + live registry and sanctions checks), monitoring dashboards on every award, custom board reports, and eligibility routing for intake.
Preview generated from this grantee’s public IRS filings and independent reporting. Pillars marked “live in Plinth” require the applicant’s submitted documents. Shown as illustration, not a formal assessment.
Warm introductions · Powered by PlinthPro
Find your warmest path to The Hideo Sasaki Foundation through people who sit on both boards. Search for your organization and Plinth traces the introduction across shared trustees and officers.
Every link is a documented governance overlap in public IRS 990 filings — not a personal network — and each hop carries its own confidence tier. Low-confidence or distant paths are held back rather than guessed.