Available Sublevel Domains   JP, AC.JP, AD.JP, CO.JP, ED.JP, GEO.JP, GO.JP, GR.JP, LG.JP, NE.JP, OR.JP 
Other restrictions details  IDN notes: Only letters of the English alphabet, numerals, hyphens and the letters áéýúíóþæöð may be used in domain names. Icelandic applicants can register an unlimited number of domains.

Foreign applicants can only register domains based on a Trademark registered in Iceland. Only one domain per trademark can be applied for. Local presence required: The administrative contact must have a local address in Japan. 
Min Characters per Domain Name 
Max Characters per Domain Name  63 
Purely numeric domain  Yes 
IDN offered  Yes 
Reserved words list / link   None 
Name Server registration needed  No 
Zone Preload  No 
Mail Address  No 
Local DNS required  No 
Minimum number of name servers 
Maximum number of name servers 
Dispute Resolution Policy  JP Domain Name Dispute Resolution Policy 
Dispute Resolution Policy Link  http://www.jpnic.jp/doc/jpnic-00876.html 
NIC Registration Agreement  http://www.japanregistry.com/policy.php