What it is
A Mandala Chart is a 3×3 grid with your main theme in the centre cell and eight related themes in the cells around it. Expand it and each of those eight themes becomes the centre of its own 3×3 block, producing a 9×9 layout of 81 cells — one central goal, eight sub-goals, and sixty-four outer cells for concrete actions.
Most English-speaking readers meet it as "Shohei Ohtani's mandala chart" — the goal sheet he wrote as a sixteen-year-old, which has circulated widely since he became the most famous baseball player alive.
That sheet is real, and it is reproduced below. But the name attached to it is wrong, and the mistake is not trivial: "Mandala Chart" is a registered trademark for a different tool, by a different author, built for a different purpose. Three separate Japanese frameworks share the same nested 3×3 geometry, and English coverage has collapsed them into one. The provenance is fully traceable, so it is set out below before the how-to.
The grid
The centre 3×3 is the whole method in miniature — the goal, and the eight things it decomposes into:
| Sub-goal 1 | Sub-goal 2 | Sub-goal 3 |
| Sub-goal 4 | THE GOAL | Sub-goal 5 |
| Sub-goal 6 | Sub-goal 7 | Sub-goal 8 |
Then each sub-goal is copied into the centre of its own 3×3 block and surrounded by eight actions. Eight blocks of eight, plus the centre block, is the full 9×9.
The constraint is the point. Eight is not a suggestion — it is a quota, and the quota is what pushes you past the three or four sub-goals you already had in mind.
Ohtani's sheet, as actually written
He wrote it in his first year at Hanamaki Higashi High School, around 2009. The centre cell reads 「ドラ1 8球団」 — be a first-round draft pick for eight teams. The eight surrounding cells:
| 体づくり — body | コントロール — control | キレ — sharpness |
| メンタル — mental | ドラ1 8球団 | スピード160km/h |
| 人間性 — character | 運 — luck | 変化球 — breaking balls |
Five of the eight are what you would expect from a pitcher: body, control, sharpness, velocity, repertoire. Under 体づくり sit action cells like 体のケア (body care) and サプリメントを飲む (take supplements) — ordinary, checkable things.
The two that make the sheet famous are 運 (luck) and 人間性 (character), because a sixteen-year-old assigned concrete daily behaviour to them: picking up trash, greeting people, caring for equipment. That is the actual lesson of the artifact, and it is a lesson about the method rather than about baseball — the grid has no cell for "and then be lucky." Every cell has to be fillable with an action, so intangibles either get operationalised or they get dropped.
The Mandala Chart Provenance Chain
Three tools, three authors, three purposes, one geometry:
| Year | Name | Author | Built for | Trademark |
|---|---|---|---|---|
| 1979 | マンダラチャート (Mandala Chart) | Yasuo Matsumura (松村寧雄), Clover Management Research | A general-purpose management and thinking framework — not goal-setting | Registered by Clover in 2006; managed by the Mandala Chart Association since 2022 |
| 1987 | マンダラート (Mandal-Art) | Hiroaki Imaizumi (今泉浩晃), designer | Idea generation — a brainstorming technique built on Matsumura's chart | Separately registered |
| — | オープンウィンドウ64 (Open Window 64) | Takashi Harada (原田隆史), as one of the five tools of the 原田メソッド | Goal achievement — decomposing one target into actions | — |
Matsumura's biography dates it precisely: born in Ueno, Tokyo in 1939, he read law at Waseda, joined Japan Olivetti, went independent as a management consultant in 1979, founded Clover Management Research in Chiba that same year, and developed the "3×3 nine-cell matrix with a central core" in the same year he founded the firm.
Ohtani's sheet is the third row, not the first. It is an Open Window 64 from the Harada Method, which his high-school baseball coach Hiroshi Sasaki (佐々木洋) had incorporated into his coaching; Ohtani later received formal Harada Method training during his time with the Nippon-Ham Fighters. The name "Open Window 64" comes from its 8×8 structure — sixty-four action cells.
So the world's most famous "Mandala Chart" is, on the documentary record, not a Mandala Chart.
The 64/72/81 Test
Here is the useful consequence, and it is a test you can run on any article in a few seconds.
The cell count an English source quotes tells you which Japanese tool it is actually describing — and whether the author knew there was a difference.
| If the source says… | It is counting | Which means it is describing |
|---|---|---|
| 81 cells | the whole 9×9 grid | the geometry, source-agnostic — usually a writer who looked at the picture |
| 64 cells | 8 sub-goals × 8 actions | Harada's Open Window 64 — the Ohtani lineage, named for exactly this number |
| 72 ideas | 81 minus the centre and the 8 sub-goal cells | Imaizumi's Mandal-Art, whose expanded form is conventionally described this way |
All three numbers are correct. They are just correct about different things, and a source that switches between them mid-article — "the 81-box goal sheet, also called the 64-cell template" — is a source that has merged three frameworks without noticing.
Two honest caveats, because the point is precision rather than gotcha. First, Japanese sources conflate them too: Japanese publishers routinely market goal-setting workbooks as containing 「大谷翔平選手が使ったマンダラチャート」, so this is not a case of the West mangling something the source language keeps straight. Second, the tools are genuinely related — Mandal-Art was built on Matsumura's chart, and the shared 3×3-of-3×3 geometry is not a coincidence. The claim here is narrow and documentary: they have different authors, different dates, different purposes, and two of the three names are registered trademarks belonging to specific organisations.
When to use it
- One goal that is large, abstract, and stalled. The grid's value is decomposition, so it needs something worth decomposing.
- When you suspect your plan is thinner than it looks. Eight × eight is a quota, and an empty cell is a finding.
- Season, annual, or skill-acquisition planning — anything with a horizon long enough that sixty-four actions is a sane number.
When not to use it: for anything with more than one goal (the geometry has exactly one centre); for team goals with shared ownership, where OKRs fit better because they carry owners and measurable key results; or when your problem is choosing between goals rather than executing one — that is a prioritisation problem, not a decomposition problem.
How to run it
- Write the goal in the centre. Make it specific enough to fail. "ドラ1 8球団" is a good model: it names an outcome and a number.
- Fill all eight surrounding cells before going any deeper. This is the step people skip. The first three or four arrive immediately; cells five to eight are where the method starts earning its keep.
- Include at least one intangible. Ohtani's sheet has two. If every sub-goal is a technical skill, you have written a training plan, not a goal sheet.
- Copy each sub-goal into the centre of its own block and fill its eight action cells.
- Apply the this-week test to every action cell. An action you could not start within a week is a sub-goal in disguise — push it down a level or rewrite it.
- If a sub-goal cannot produce eight actions, the sub-goal is too vague. That is the diagnostic, not a failure. Rewrite it until it can.
Common pitfalls
| Pitfall | Why it happens | Fix |
|---|---|---|
| Filling only the obvious four sub-goals | Eight feels arbitrary, so people stop when the list "feels complete" | Treat eight as a hard quota — the last three are the ones you had not thought of |
| Action cells that are restatements | "Improve control" under コントロール is a sub-goal repeated, not an action | Apply the this-week test to every outer cell |
| Dropping the intangibles | Luck and character resist decomposition, so they get cut | Keep them and force concrete behaviour into the cells, which is exactly what makes Ohtani's sheet notable |
| Treating it as a tracker | The grid is a planning artifact; it has no dates, owners, or progress state | Pair it with OKRs or SMART goals for the tracking layer |
| Citing it as "Ohtani's Mandala Chart" | Every English source does | See the provenance chain above — it is an Open Window 64 |
Related frameworks
- OKR — the team-scale counterpart, with owners and measurable key results. See OKR examples for product teams and OKRs vs KPIs.
- SMART goals — the sentence-level discipline for making each cell checkable.
- Ikigai — the other Japanese framework whose famous Western diagram has a documented and widely misreported origin. The parallel is close enough to be instructive: in both cases the picture travelled and the provenance did not.
- Wheel of Life — when the problem is balance across domains rather than depth on one goal.
Want to fill one in on your phone? Framework for iPhone & iPad ships the 9×9 grid with AI assistance for the sub-goals and action cells.
Sources
- Mandala Chart Association — "マンダラチャートとは" — the official description of Matsumura's 1979 framework
- Mandala Chart Association — "「マンダラチャート®」活用事例と商標使用について" — trademark ownership and permitted use
- Mandala Chart Association — "松村寧雄 アーカイブ" — Matsumura's biography and the 1979 date
- Clover Management Research — 会社概要 — the firm Matsumura founded in 1979
- Wikipedia (ja) — マンダラート — Imaizumi's 1987 Mandal-Art, its relation to Matsumura's chart, and the 81-cell / 72-idea structure
- PRESIDENT Online — 「大谷翔平を超一流にした『目標設定･自己分析･実現シナリオ』全手法」 — confirms Ohtani's sheet is an オープンウインドウ64 from Harada's method
- Fujisan Trends — 「《オープンウィンドウ64》大谷翔平の目標の立て方」 — OW64 as one of the five Harada Method tools, and coach Sasaki's use of it
- BRAND NEW FRAME.NOTE — 「大谷翔平選手の目標達成シートの作り方」 — the centre goal and the eight sub-goals as written
- Forest Publishing — 原田隆史『一流の達成力』 — Harada as the method's author
- Lucid — "Setting goals with a Mandala Chart" — an English source that dates the chart to Matsumura 1979 and notes it was a general-purpose thinking tool rather than a goal-setting one