Research
How concentrated is supply in Japanese central-government procurement?
17,465 suppliers have recorded awards, and the ten largest by value account for 29.0% of all award value recorded in the window.
Data updated Oct 16, 2026
The question
Is recorded award value concentrated in a few suppliers, or spread widely?
What was measured
Award results published on Japan's Procurement Portal (調達ポータル) with an award date between 2021-10-16 and 2026-10-16. Each share is measured against ¥5,767,748,100,047, the value of every award in that window, including awards whose corporate number (法人番号) could not be resolved. Supplier counts, rankings and per-supplier values cover only awards with a resolved corporate number: 17,465 suppliers in total.
Key figures
Suppliers with awards
17,465
Distinct corporate numbers with at least one award in the window
Top-10 share of value
29.0%
Sum of the ten largest suppliers over the value of every award in the window
Top-100 share of value
55.7%
The hundred largest of 17,465 suppliers over the value of every award in the window
Total awarded
¥5,767,748,100,047
JPY. Every award in the window, including awards with no resolved corporate number. The denominator for every share here
Awards with no resolved corporate number
0.20%
1,834 awards, ¥11,642,104,313. Their share of the value of every award in the window: in the denominator, credited to no supplier
The data
| Supplier | Awards | Value | Bodies | Share |
|---|---|---|---|---|
| 富士通株式会社 | 564 | ¥358,127,702,543 | 25 | 6.21% |
| 日本電気株式会社 | 837 | ¥292,655,908,349 | 22 | 5.07% |
| 株式会社ＮＴＴデータ | 347 | ¥284,335,400,094 | 21 | 4.93% |
| 株式会社エヌ・ティ・ティ・データ | 182 | ¥136,244,893,916 | 16 | 2.36% |
| アクセンチュア株式会社 | 162 | ¥132,677,005,001 | 16 | 2.30% |
| 株式会社日立製作所 | 179 | ¥107,867,723,266 | 19 | 1.87% |
| ＮＴＴドコモビジネス株式会社 | 247 | ¥95,794,910,928 | 25 | 1.66% |
| 東芝デジタルソリューションズ株式会社 | 200 | ¥94,819,264,100 | 9 | 1.64% |
| 株式会社三菱総合研究所 | 833 | ¥88,075,626,301 | 24 | 1.53% |
| 前田建設工業株式会社 | 13 | ¥79,391,171,000 | 3 | 1.38% |
| ＫＤＤＩ株式会社 | 178 | ¥73,272,743,066 | 22 | 1.27% |
| ＮＴＴ東日本株式会社 | 98 | ¥62,701,266,940 | 13 | 1.09% |
| 西松建設株式会社 | 10 | ¥61,267,100,000 | 1 | 1.06% |
| 株式会社ケーネス | 683 | ¥54,253,140,000 | 2 | 0.94% |
| 三菱電機株式会社 | 145 | ¥47,705,436,900 | 7 | 0.83% |
| 株式会社ビー・エス・デーインフォメーションテクノロジー | 48 | ¥40,960,123,165 | 3 | 0.71% |
| 日本アイ・ビー・エム株式会社 | 49 | ¥39,681,279,420 | 10 | 0.69% |
| 大成建設株式会社 | 24 | ¥38,284,341,849 | 6 | 0.66% |
| 沖電気工業株式会社 | 166 | ¥37,169,515,745 | 20 | 0.64% |
| 株式会社野村総合研究所 | 463 | ¥34,565,284,895 | 20 | 0.60% |
Names appear as published. Corporate groups and mergers are not consolidated — separate legal entities are counted separately.
How to read this
A top-ten share of 29.0% has to be read against a base of 17,465 suppliers. Awards are spread widely by count, while value leans toward a relatively small group. Volume and value are not the same distribution.
Some of the largest rows can belong to the same corporate group as separate legal entities, because this aggregates by corporate number and not by group. Read as groups rather than legal entities, concentration at the top would be higher than these figures show — never lower.
This does not establish that the market is open or closed. Concentration varies by what is being bought, and an aggregate across everything does not show that variation.
Sources
Method
- Award results are aggregated by corporate number and ranked by value, and the sum of the top N is divided by the value of every award in the window. Awards with no resolved corporate number are in that denominator but are not attributed to any supplier. Shares are computed from actual rows out to the hundredth supplier; nothing is extrapolated.
- No Herfindahl index is published here. It would require every supplier's share, and while unresolved corporate numbers remain in the record the result would not be accurate enough to present as an index.
What this does not tell you
- Central-government award results only. Local and prefectural procurement, some independent administrative institutions, and anything not published on the Procurement Portal are outside this dataset.
- The window runs 2021-10-16 to 2026-10-16. Awards outside it are not counted.
- All amounts are in yen and are never combined with, or compared against, the US federal dollar figures elsewhere on this site.
- Awards whose corporate number cannot be resolved from the record are missing from the supplier figures. That is a gap in the record, not an absence of activity.