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 January 2006, 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) | 297 | 250 | 17 | 1(3) |
| AC(Universities, Technical schools, Incorporated schools) | 3251 | 3061 | 89 | 0(1) |
| CO(Incorporated companies, Limited companies) | 283873 | 263452 | 10181 | 6(14) |
| GO(Government organizations, Government-affiliated organizations) | 839 | 720 | 22 | 0(1) |
| OR(Foundation, Aggregate corporation) | 21071 | 19686 | 725 | 2(6) |
| NE(Network services) | 17317 | 13183 | 336 | 2(5) |
| GR(Arbitrary organization) | 8948 | 7602 | 377 | 2(4) |
| ED(Schools including primary, junior and senior high schools) | 4394 | 3946 | 70 | 0(0) |
| Geographic Type | 3816 | 3235 | 46 | 0(2) |
| General-Use JP Domain Name | 439784 | 292504 | 2777 | 5(54) |
| Total | 786124 | 608649 | 14642 | 18(90) |