Secure.ne.jp (JP) mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Secure.ne.jp (JP) is the mailbox provider for 340 domains — 0.05% of 665,310 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 340 domains in the Tranco top-1M use Secure.ne.jp (JP) (0.05% of domains with MX records).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .jp (30.6% of its domains).
- Region skew: Japan.
- Most co-used service: Amazon SES.
- Directory category: mailbox provider.
Why Secure.ne.jp (JP) appears in this category
Japanese SAKURA-related shared mailbox (secure.ne.jp).
We classify it as a mailbox provider from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Secure.ne.jp is a Japanese mailbox provider that operates as the primary mail receiver for organisations distributed across Japan and other territories. It predominantly serves smaller to mid-sized deployments rather than the largest global brands, with particular concentration in .jp domains.
For email practitioners, Secure.ne.jp's footprint indicates a distributed, regional infrastructure pattern typical of Japan. Its frequent association with Amazon SES in infrastructure scans suggests that organisations using Secure.ne.jp often combine local mail receiving with outsourced transactional sending. This hybrid model is relevant when optimising deliverability into Japan or diagnosing issues specific to that mail infrastructure.
Where Secure.ne.jp (JP) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.3% |
| Top 100,000 | 9 | 2.6% |
| Top 1,000,000 | 327 | 96.2% |
| Unranked | 3 | 0.9% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .jp | 104 | 30.6% | |
| .com | 97 | 28.5% | |
| .co.jp | 78 | 22.9% | |
| .or.jp | 32 | 9.4% | |
| .net | 11 | 3.2% | |
| .org | 5 | 1.5% | |
| .ne.jp | 2 | 0.6% | |
| .info | 2 | 0.6% | |
| .biz | 2 | 0.6% | |
| .ac.jp | 2 | 0.6% |
What Secure.ne.jp (JP) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 340 domains.
| Type | Service | Domains | Share of Secure.ne.jp (JP) users |
|---|---|---|---|
| ESP | Amazon SES | 11 | 3.2% |
| ESP | FSI Email Security | 8 | 2.4% |
| ESP | CrmStyle | 7 | 2.1% |
| ESP | HubSpot | 5 | 1.5% |
| ESP | Repica WebCAS | 5 | 1.5% |
| ESP | BizMatrix | 4 | 1.2% |
| ESP | Kagoya (JP, sender) | 4 | 1.2% |
| ESP | Q-Send | 4 | 1.2% |
| ESP | Benchmark Email | 3 | 0.9% |
| ESP | ActiveGate | 2 | 0.6% |
When to include Secure.ne.jp in deliverability validation
Secure.ne.jp should not be a priority for universal global deliverability testing; it operates in a regional niche rather than among tier-one providers. Conversely, if your mail programmes target Japan or rely on meaningful send volume into smaller Japanese organisations, validating against Secure.ne.jp infrastructure is worthwhile for identifying regional filtering or authentication issues. Pay particular attention to SPF, DKIM, and DMARC compliance, as regional providers often enforce stricter validation standards than larger international carriers.
See the full Secure.ne.jp (JP) data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
Is Secure.ne.jp a mailbox provider I need to test against?
Secure.ne.jp is primarily relevant for senders with mail volume into Japan or Japanese organisations. Include it in regional validation workflows if you target that geography, but it is not essential for general global deliverability testing.
How many domains use Secure.ne.jp (JP)?
340 domains in the Tranco top-1M use Secure.ne.jp (JP) as their mailbox provider as of September 12, 2026 (0.05% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Secure.ne.jp (JP) common enough to affect email deliverability testing?
Secure.ne.jp (JP) accounts for 0.05% 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.
Which countries or TLDs use Secure.ne.jp (JP) most?
Secure.ne.jp (JP)'s largest TLD is .jp (30.6% of its domains); it appears across 15 TLDs in total.