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SGSiteGraph

flexnet.co.jp

404 Not Found

Last scanned Aug 24, 2026, 1:22 PM · 1 view

66

Overall score

Fair

Summary

This website uses Nginx hosted on IIJ - Internet Initiative Japan Inc., JP. SEO is fair (60/100) and accessibility is good (85/100). Security scores poor (25/100) and performance excellent (100/100). Top issue: Missing meta description.

Japan
Hosted on IIJ - Internet Initiative Japan Inc., JP

Top issues to fix

13 issues found · 5 high priority

  • TLS certificate expires in -201 days

    Security

    Renew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+7 more issues — details in the sections below.

60

SEO

6 issue(s) found

100

Performance

561 ms

25

Security

HTTPS & header checks

85

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title
404 Not Found
Description
Canonical
Language
Charset
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Nginx

Hosting & CDN

CDN provider
—
IP address
220.100.234.171
ASN
AS2497 (IIJ - Internet Initiative Japan Inc., JP)

DNS records

TypeValue
A
  • 220.100.234.171
AAAA—
MX
  • flexnetjp.sakura.ne.jp
TXT
  • v=spf1 ip4:210.129.194.147/32 ip4:210.129.52.225/32 ip4:210.129.53.62/32 ip4:210.129.60.54/32 ip4:210.129.49.234/32 ip4:210.129.50.231/32 ip4:210.129.49.159/32 include:spf.tricorn.net a:www1321.sakura.ne.jp -all
  • 202212131732045B0A7CFF8F2819CC529981515693FDD537163AD68D942ECBB59A281950131433
  • 20231110174405A482F5C10FB4ACEBC13B99A481F231B9643E341087A2BF2F53686039271A5130
NS
  • 01.dnsv.jp
  • 02.dnsv.jp
  • 04.dnsv.jp
  • 03.dnsv.jp
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
DigiCert Inc
Subject
www.shadan-kun.com
Valid from
Jan 29, 2025
Valid to
Feb 4, 2026
Days until expiry
-201
SAN domains
www.shadan-kun.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 0 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 119 B

Page size

283 B

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://flexnet.co.jp
Final URL
https://flexnet.co.jp
HTTP status
404
HTTP version
HTTP/1.1
Response time
561 ms
HTML size
283 B
Redirect chain
https://flexnet.co.jp

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does flexnet.co.jp use?
flexnet.co.jp is built with Nginx.
Is flexnet.co.jp secure (HTTPS)?
Yes. flexnet.co.jp uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Feb 4, 2026.
Who hosts flexnet.co.jp?
flexnet.co.jp is hosted on IIJ - Internet Initiative Japan Inc., JP.
What is flexnet.co.jp's SEO score?
flexnet.co.jp scored 60/100 for SEO in the latest analysis (fair).
What is flexnet.co.jp's overall website score?
flexnet.co.jp has an overall SiteGraph score of 66/100, combining SEO, performance, security, and accessibility.