{
 "metric": "security-headers",
 "segment": "jp",
 "anchor": "domain",
 "label": "Japan (domains)",
 "population": "domains in Japan",
 "states": [
  "strong",
  "partial",
  "missing"
 ],
 "quiet_failure_states": [
  "partial",
  "missing"
 ],
 "measurement": "Tier 3a; check `Strict-Transport-Security`, `Content-Security-Policy`, `X-Frame-Options` on the homepage response. Denominator: `has_web`.",
 "why_it_matters": "HSTS is what stops the first, downgradeable request; CSP is what limits the damage of injected script. Both are one-line changes, and both are commonly switched off silently by a framework upgrade or a proxy change.",
 "limits": null,
 "data_tier": "http_3a",
 "population_predicate": "has_web",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-13",
  "n": 264,
  "qf_pct": 93.56,
  "ci": [
   89.93,
   95.94
  ],
  "dist": {
   "strong": 6.44,
   "partial": 15.53,
   "missing": 78.03
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 88,
   "qf_pct": 97.73,
   "ci": [
    92.09,
    99.37
   ],
   "dist": {
    "strong": 2.27,
    "partial": 17.05,
    "missing": 80.68
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 91,
   "qf_pct": 95.6,
   "ci": [
    89.24,
    98.28
   ],
   "dist": {
    "strong": 4.4,
    "partial": 17.58,
    "missing": 78.02
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 265,
   "qf_pct": 93.58,
   "ci": [
    89.97,
    95.96
   ],
   "dist": {
    "strong": 6.42,
    "partial": 15.09,
    "missing": 78.49
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 265,
   "qf_pct": 93.58,
   "ci": [
    89.97,
    95.96
   ],
   "dist": {
    "strong": 6.42,
    "partial": 15.47,
    "missing": 78.11
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-06",
   "n": 263,
   "qf_pct": 93.54,
   "ci": [
    89.89,
    95.93
   ],
   "dist": {
    "strong": 6.46,
    "partial": 15.21,
    "missing": 78.33
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-13",
   "n": 264,
   "qf_pct": 93.56,
   "ci": [
    89.93,
    95.94
   ],
   "dist": {
    "strong": 6.44,
    "partial": 15.53,
    "missing": 78.03
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/security-headers/jp"
}