Verifying against the live site and live WHOIS/DNS…
Common questions
Is koikikukan.com legit or a scam?
AboutUs doesn't label sites "legit" or "a scam": this page lists the dated registration, DNS, HTTPS, mail-authentication and safety checks we could verify, each with its source, so you can decide for yourself.
Who owns koikikukan.com?
Nobody has completed AboutUs's owner verification for koikikukan.com. That's true of most sites here — it isn't itself a warning sign.
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Lifeline · koikikukan.com over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 21 years ago · on AboutUs since 2006 · 3 registrar changes since May 19, 2012 · no registrant change on record since 2009 · last checked Nov 1, 2026.
Registration
RegisteredApr 17, 2005koikikukan.com was registered on Apr 17, 2005.Source: RDAP, fetched Aug 29, 2026
AboutUs record
AboutUs wiki pageJun 20, 2006 – Jan 14, 2008An AboutUs wiki page described koikikukan.com from Jun 20, 2006 to Jan 14, 2008 (3 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
ENOM, INC.May 19, 2012 – Jun 25, 2012Registrar ENOM, INC. (IANA 48) in the WHOIS and RDAP records held for koikikukan.com, from May 19, 2012 to Jun 25, 2012.Source: WHOIS / RDAP archive (who.is)MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDESep 5, 2012Registrar MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDE in the registration data recorded on Sep 5, 2012.
Registrant
Registrant recordsJun 25, 2009 – Apr 24, 2026Registration records for koikikukan.com are held from Jun 25, 2009 to Apr 24, 2026 (68 records). None shows a change of registrant. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
No registrant changes recorded, 2009–2026
Zone file
Nameservers: dns.ne.jpMay 19, 2012 – Oct 17, 2013Registration records listed dns.ne.jp nameservers (ns1.dns.ne.jp) for koikikukan.com from May 19, 2012 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)Nameservers: dns.ne.jp
Certificate
Japan Registry Services Co.May 5, 2026 – Nov 4, 2026 (latest)Japan Registry Services Co. issued 3 certificates for koikikukan.com from May 5, 2026, the latest valid until Nov 29, 2026. Seen in use on Oct 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 8, 2026
2010201520202025Apr ’26← last 12 months, drawn wider
Every dated fact on this lifeline (14)
Apr 17, 2005Registration: koikikukan.com was registered on Apr 17, 2005.Source: RDAP, fetched Aug 29, 2026
Jun 20, 2006 – Jan 14, 2008AboutUs record: An AboutUs wiki page described koikikukan.com from Jun 20, 2006 to Jan 14, 2008 (3 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “XHTML 1.0 Transitional によるマークアップを行っています。全てのページで W3C Markup Validation Service で valid となるよう、また Another HTML-lint gateway で文法を適宜チェックするよう、こころがけています(方針はサイト開設からかなり後で決めたため、一部適用が追いついていない部分もあります)。”Source: AboutUs wiki archive, 2006
Jun 25, 2009 – Apr 24, 2026Registrant: Registration records for koikikukan.com are held from Jun 25, 2009 to Apr 24, 2026 (68 records). None shows a change of registrant. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
May 19, 2012 – Jun 25, 2012Registrar: Registrar ENOM, INC. (IANA 48) in the WHOIS and RDAP records held for koikikukan.com, from May 19, 2012 to Jun 25, 2012.Source: WHOIS / RDAP archive (who.is)
May 19, 2012 – Oct 17, 2013
“XHTML 1.0 Transitional によるマークアップを行っています。全てのページで W3C Markup Validation Service で valid となるよう、また Another HTML-lint gateway で文法を適宜チェックするよう、こころがけています(方針はサイト開設からかなり後で決めたため、一部適用が追いついていない部分もあります)。”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJun 20, 2026 – Aug 30, 2026 (latest)Authority and Safety last refreshed Aug 30, 2026.Source: AboutUs checks
Source: WHOIS / RDAP archive (who.is)
Japan Registry Services Co.,Ltd.(JPRS)Japan Registry Services Co.,Ltd.(JPRS)Jun 24, 2018 – Apr 24, 2026Registrar Japan Registry Services Co.,Ltd.(JPRS) (IANA 1485) in the WHOIS and RDAP records held for koikikukan.com, from Jun 24, 2018 to Apr 24, 2026.Source: WHOIS / RDAP archive (who.is)
Japan Registry Services Co., Ltd.Jul 23, 2026 – Oct 8, 2026 (latest)Registrar Japan Registry Services Co., Ltd. in the registration data recorded, first on Jul 23, 2026 and most recently on Oct 8, 2026.Source: RDAP, fetched Aug 29, 2026
Nameservers: dns.ne.jp
Oct 18, 2013 – Apr 3, 2018
dns.ne.jp (ns1.dns.ne.jp, ns2.dns.ne.jp) were the nameservers listed for koikikukan.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).
Nameservers: dns.ne.jpNameservers: dns.ne.jpApr 4, 2018 – Apr 24, 2026Registration records listed dns.ne.jp nameservers (ns1.dns.ne.jp) for koikikukan.com from Apr 4, 2018 to Apr 24, 2026. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Seen in the .com zone fileSep 8, 2026 – Nov 1, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 1, 2026. Nameservers on Nov 1, 2026: ns1.dns.ne.jp, ns2.dns.ne.jp.Source: ICANN CZDS zone file, snapshot Nov 1, 2026
Zone file: Registration records listed dns.ne.jp nameservers (ns1.dns.ne.jp) for koikikukan.com from May 19, 2012 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 5, 2012Registrar: Registrar MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDE in the registration data recorded on Sep 5, 2012.Source: WHOIS / RDAP archive (who.is)
Oct 18, 2013 – Apr 3, 2018Zone file: dns.ne.jp (ns1.dns.ne.jp, ns2.dns.ne.jp) were the nameservers listed for koikikukan.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Apr 4, 2018 – Apr 24, 2026Zone file: Registration records listed dns.ne.jp nameservers (ns1.dns.ne.jp) for koikikukan.com from Apr 4, 2018 to Apr 24, 2026. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 24, 2018 – Apr 24, 2026Registrar: Registrar Japan Registry Services Co.,Ltd.(JPRS) (IANA 1485) in the WHOIS and RDAP records held for koikikukan.com, from Jun 24, 2018 to Apr 24, 2026.Source: WHOIS / RDAP archive (who.is)
May 5, 2026 – Nov 4, 2026Certificate: Japan Registry Services Co. issued 3 certificates for koikikukan.com from May 5, 2026, the latest valid until Nov 29, 2026. Seen in use on Oct 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 8, 2026
Jun 20, 2026 – Aug 30, 2026AboutUs record: Authority and Safety last refreshed Aug 30, 2026.Source: AboutUs checks
Jul 23, 2026 – Oct 8, 2026Registrar: Registrar Japan Registry Services Co., Ltd. in the registration data recorded, first on Jul 23, 2026 and most recently on Oct 8, 2026.Source: RDAP, fetched Aug 29, 2026
Sep 8, 2026 – Nov 1, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 1, 2026. Nameservers on Nov 1, 2026: ns1.dns.ne.jp, ns2.dns.ne.jp.Source: ICANN CZDS zone file, snapshot Nov 1, 2026
3 of 4 safety checks passed (Nov 4, 2026).
Registered 2005 · site is live · HTTPS valid
Koikikukan.com
Koikikukan.com is a personal Japanese-language blog run by an individual based in Ichikawa, Chiba, Japan. It originated as a private "one-liner joke page" shared among friends before evolving into a broader blog covering multiple topics. The site's title, meaning roughly "small void space," reflects the owner's view of writing as a spatial art, analogous to painting or engraving.
Add the HSTS, Content-Security-Policy, and X-Frame-Options response headers.
AboutUs has not vetted this site. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.
latest result
Domain registered Apr 17, 2005 — 21 years old.
latest result
Registrar on record: Japan Registry Services Co., Ltd. — unchanged since AboutUs began tracking (Jul 23, 2026).
latest result
HTTPS request succeeded for koikikukan.com.
checked Oct 3, 2026
The live front page reads as a personal site or blog that is a personal, non-commercial site, mainly for specialists in its field.
Authority 41/100— ahead of 41% of the August 2026 scored sampleClear
Why this authority score
41 is a percentile: higher than 41% of sites we score.
How it's calculated
Prominence (Tranco rank #704,172)+5
Verified continuity: 21.6 years (RDAP registration)+10
Security & email hygiene+3
Calibration adjustment (published map)+5
Model score: 23/99 — what these reason lines add up to.
Published Authority (percentile): 41/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 65 days ago); 3/3 transport and email checks available (oldest recorded about 65 days ago). This is evidence coverage, not a probability that a website is safe.
What koikikukan.com said about itself, 2006
Quoted from the site's AboutUs wiki page in each year it changed (1 version). These are the page's own words at the time, not AboutUs's assessment. New words · dropped words
2006
XHTML 1.0 Transitional によるマークアップを行っています。全てのページで W3C Markup Validation Service で valid となるよう、また Another HTML-lint gateway で文法を適宜チェックするよう、こころがけています(方針はサイト開設からかなり後で決めたため、一部適用が追いついていない部分もあります)。
Site history
Dated record — historical facts always carry their date.