According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Kagoya (JP) is the mailbox provider for 587 domains — 0.09% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Kagoya is a Japanese email and web hosting infrastructure provider operating primarily from Japan. It serves smaller to mid-market websites, many of which use it both for receiving email and as the source of outbound mail.
As a primary MX record for the long tail of smaller websites, Kagoya is relevant for senders engaging with Asian markets or smaller business domains. Its global spread across diverse top-level domains—particularly .com—combined with regional strength in Japan, makes it a practical testing consideration for anyone whose mail targets these segments.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.2% |
| Top 100,000 | 33 | 5.6% |
| Top 1,000,000 | 489 | 83.3% |
| Unranked | 64 | 10.9% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 200 | 34.1% | |
| .jp | 182 | 31.0% | |
| .co.jp | 102 | 17.4% | |
| .net | 42 | 7.2% | |
| .or.jp | 18 | 3.1% | |
| .info | 9 | 1.5% | |
| .ne.jp | 8 | 1.4% | |
| .biz | 4 | 0.7% | |
| .tv | 3 | 0.5% | |
| .club | 3 | 0.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 587 domains.
| Type | Service | Domains | Share of Kagoya (JP) users |
|---|---|---|---|
| ESP | Kagoya (JP, sender) | 509 | 86.7% |
| ESP | BizMatrix | 39 | 6.6% |
| ESP | Amazon SES | 31 | 5.3% |
| ESP | FSI Email Security | 14 | 2.4% |
| ESP | SendGrid (Twilio) | 13 | 2.2% |
| ESP | Repica WebCAS | 12 | 2.0% |
| ESP | Zendesk | 10 | 1.7% |
| ESP | Q-Send | 6 | 1.0% |
| ESP | HubSpot | 4 | 0.7% |
| ESP | Brevo (ex-Sendinblue) | 4 | 0.7% |
Smaller providers like Kagoya often operate with less centralised reputation infrastructure than the handful of mega-providers dominating inbox placement. This means reputation signals—sender authentication, subscriber engagement, complaint handling—may not propagate or persist identically. For senders, this creates a testing blind spot: ignoring regional or smaller-scale MX providers can mask deliverability issues that surface only once mail reaches these platforms. Testing against a representative sample including providers like Kagoya is particularly important if your audience skews toward Asia-Pacific regions or smaller business domains rather than enterprise.
See the full Kagoya (JP) data page (KPI cards, trend, sample domains) →
If your recipient base includes sites on Japanese hosting or smaller regional providers, or if you send significantly to Asia-Pacific markets, testing against Kagoya is worthwhile. For mail destined primarily to large enterprise domains, it is a lower priority.
587 domains in the Tranco top-1M use Kagoya (JP) as their mailbox provider as of July 13, 2026 (0.09% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Kagoya (JP) accounts for 0.09% of domains with MX records in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Kagoya (JP)'s largest TLD is .com (34.1% of its domains); it appears across 25 TLDs in total.