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 November 2008, 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) | 274 | 236 | 87 | 5(7) |
| AC(Universities, Technical schools, Incorporated schools) | 3475 | 3295 | 583 | 7(15) |
| CO(Incorporated companies, Limited companies) | 324353 | 302209 | 98176 | 889(945) |
| GO(Government organizations, Government-affiliated organizations) | 887 | 722 | 138 | 2(4) |
| OR(Foundation, Aggregate corporation) | 24345 | 22815 | 6412 | 51(57) |
| NE(Network services) | 17371 | 13109 | 2787 | 70(80) |
| GR(Arbitrary organization) | 8136 | 6910 | 1576 | 17(21) |
| ED(Schools including primary, junior and senior high schools) | 4504 | 4118 | 737 | 5(6) |
| Geographic Type | 3004 | 2458 | 319 | 3(5) |
| General-Use JP Domain Name | 666061 | 456753 | 117625 | 1723(1838) |
| Total | 1054356 | 813709 | 228510 | 2772(2978) |