~/dnsniffer/issuers/japan-registry-services·rank #20
$ dnsniffer count --issuer japan-registry-services --active
▸ How many domains does Japan Registry Services secure?
40,400
active domains whose current TLS certificate was issued by Japan Registry Services, as of — 0.02% of all attributed domains.
# rank #20 of all CAs# all records held: 40,408# subdomains: 0# intermediates: 2# Japan
~/issuers/japan-registry-services/history·active domains
40,400
domains secured by Japan Registry Services on 2026-08-31 · ▲ +18,332 (+83.07%) since 2025-06-30
# y-axis starts at 20K, not zero — domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.
# change over time
30 days
▼ -0.01%
-4 domains
90 days
▲ +1.88%
+746 domains
1 year
▲ +8.89%
+3,299 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| JPRS DV RSA CA 2024 G1 | Japan | 39,828 |
| JPRS OV RSA CA 2024 G1 | Japan | 572 |
# faq
- ? How many domains does Japan Registry Services secure?
- Japan Registry Services is the certificate authority for 40,400 active domains as of August 31, 2026 — 0.02% of every domain DNSniffer can attribute to an issuer.
- ? Is Japan Registry Services gaining or losing market share?
- The number of domains secured by Japan Registry Services has grown by 8.89% over the last year (+3,299 domains).
- ? Which intermediate CAs does Japan Registry Services sign from?
- We have seen 2 intermediates under Japan Registry Services, the busiest being “JPRS DV RSA CA 2024 G1” with 39,828 domains. The full list, with per-intermediate counts, is on this page.
- ? Where does this number come from?
- DNSniffer ingests Certificate Transparency logs continuously and records the issuer of the most recent certificate seen for each domain, then snapshots the per-issuer count once a day. It measures how much of the live web a CA currently secures, not how many certificates it has issued over its lifetime.