{
 "metric": "cert-expiry",
 "segment": "jp",
 "anchor": "domain",
 "label": "Japan (domains)",
 "population": "domains in Japan",
 "states": [
  "valid_30d_plus",
  "expiring_under_30d",
  "expired"
 ],
 "quiet_failure_states": [
  "expiring_under_30d",
  "expired"
 ],
 "measurement": "Tier 2, one TLS handshake; read `not_after`. Denominator: `has_web`.",
 "why_it_matters": "The certificate nobody owns. Expiry is a scheduled, entirely predictable outage that still takes sites down constantly, because renewal was somebody's manual task and that somebody left.",
 "limits": null,
 "data_tier": "tls",
 "population_predicate": "has_web",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-12",
  "n": 236,
  "qf_pct": 7.2,
  "ci": [
   4.55,
   11.23
  ],
  "dist": {
   "valid_30d_plus": 92.8,
   "expiring_under_30d": 7.2,
   "expired": 0
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 89,
   "qf_pct": 4.49,
   "ci": [
    1.76,
    10.99
   ],
   "dist": {
    "valid_30d_plus": 95.51,
    "expiring_under_30d": 2.25,
    "expired": 2.25
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 88,
   "qf_pct": 4.55,
   "ci": [
    1.78,
    11.11
   ],
   "dist": {
    "valid_30d_plus": 95.45,
    "expiring_under_30d": 4.55,
    "expired": 0
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 248,
   "qf_pct": 6.45,
   "ci": [
    4.01,
    10.22
   ],
   "dist": {
    "valid_30d_plus": 93.55,
    "expiring_under_30d": 6.45,
    "expired": 0
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-12",
   "n": 236,
   "qf_pct": 7.2,
   "ci": [
    4.55,
    11.23
   ],
   "dist": {
    "valid_30d_plus": 92.8,
    "expiring_under_30d": 7.2,
    "expired": 0
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/cert-expiry/jp"
}