The WIDE project signed a contract of collaborative research with JPRS and has been measuring deployment ratio of domain authentication since April 2005. JPRS gives us a list of domains under .jp and the WIDE project checks whether or not authentication information exists for each domain.
As of May 2012, approximate deployment ratio of domain authentitaions is:
(With the "Total" below, dividing SPF and DK by MX, respectively)
| Category | Registered | MX | SPF | DK |
|---|---|---|---|---|
| AD(Members of JPNIC) | 272 | 225 | 115 | 6(11) |
| AC(Universities, Technical schools, Incorporated schools) | 3539 | 3325 | 1292 | 14(47) |
| CO(Incorporated companies, Limited companies) | 350944 | 327034 | 174657 | 1294(1672) |
| GO(Government organizations, Government-affiliated organizations) | 686 | 501 | 569 | 2(14) |
| OR(Foundation, Aggregate corporation) | 28339 | 26614 | 12991 | 109(139) |
| NE(Network services) | 16169 | 12350 | 4474 | 98(133) |
| GR(Arbitrary organization) | 7408 | 6429 | 2512 | 26(34) |
| ED(Schools including primary, junior and senior high schools) | 4724 | 4353 | 1676 | 7(12) |
| Geographic Type | 2580 | 2186 | 777 | 4(8) |
| General-Use JP Domain Name | 869135 | 628207 | 244897 | 3473(4668) |
| Total | 1285626 | 1012404 | 444349 | 5033(6739) |