If you don't find any information above, check the original response.

[ JPRS database provides information on network administration. Its use is    ]
[ restricted to network administration purposes. For further information,     ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e'     ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'.                 ]
Domain Information:
[Domain Name]                   SMTPS.JP

[Registrant]                    HENNGE K.K.

[Name Server]                   ns-1977.awsdns-55.co.uk
[Name Server]                   ns-1092.awsdns-08.org
[Name Server]                   ns-183.awsdns-22.com
[Name Server]                   ns-879.awsdns-45.net
[Signing Key]                   

[Created on]                    2015/03/06
[Expires on]                    2025/03/31
[Status]                        Active
[Last Updated]                  2024/04/01 01:05:04 (JST)

Contact Information:
[Name]                          Masahiro Okubo
[Email]                         ca9b99aae44f978b548ce0500a4ba124-13807577@contact.gandi.net
[Web Page]                       
[Postal code]                   150-0036
[Postal Address]                16-28 Daiwa Shibuya Square, Nanpeidaicho, Shibuya
                                Tokyo
[Phone]                         +81.364153664
[Fax]