gentosha.jp
幻冬舎plus｜自分サイズが見つかる進化系ライフマガジン
Last scanned Aug 24, 2026, 1:22 PM
Overall score
Fair
Summary
幻冬舎公式ウェブマガジン＆ストア。作家・著名人が執筆するコラム連載、インタビュー、対談を毎日無料公開。新刊・名作すべての電子書籍が立ち読みできるオ�… This website uses Apache hosted on AWS. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.
幻冬舎公式ウェブマガジン＆ストア。作家・著名人が執筆するコラム連載、インタビュー、対談を毎日無料公開。新刊・名作すべての電子書籍が立ち読みできるオンライン書店では、オリジナルグッズや音声データも販売。
- United States
- Hosted on AWS
Top issues to fix
11 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
2 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
+5 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
513 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
幻冬舎公式ウェブマガジン＆ストア。作家・著名人が執筆するコラム連載、インタビュー、対談を毎日無料公開。新刊・名作すべての電子書籍が立ち読みできるオンライン書店では、オリジナルグッズや音声データも販売。
Contact
Email, phone, and address published on this site's own pages.
- kikaku@gentosha.jp
Source: https://www.gentosha.jp/contact/
Meta tags
- Title
- 幻冬舎plus｜自分サイズが見つかる進化系ライフマガジン
- Description
- 幻冬舎公式ウェブマガジン＆ストア。作家・著名人が執筆するコラム連載、インタビュー、対談を毎日無料公開。新刊・名作すべての電子書籍が立ち読みできるオンライン書店では、オリジナルグッズや音声データも販売。
- Canonical
- Language
- ja
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1, minimum-scale=1.0, maximum-scale=2.0, user-scalable=yes
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- —
- IP address
- 35.72.233.4
- ASN
- AS16509 (AMAZON-02 - Amazon.com, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Amazon
- Subject
- gentosha.jp
- Valid from
- Aug 15, 2026
- Valid to
- Feb 28, 2027
- Days until expiry
- 187
- SAN domains
- gentosha.jp, www.gentosha.jp
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 2 cookie(s) observed
Content & assets
Headings
H1 0 · H2 24 · H3 6
Links
77 internal · 6 external · 0 broken
Images
69 total · 4 missing alt
Scripts / Styles
9 scripts · 3 stylesheets
JS / CSS size
187 KB · 117 KB
Page size
33.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://gentosha.jp
- Final URL
- https://www.gentosha.jp/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 513 ms
- HTML size
- 33.9 KB
- Redirect chain
- https://gentosha.jp → https://www.gentosha.jp/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does gentosha.jp use?
- gentosha.jp is built with Django, PHP, jQuery, Google Analytics, Apache.
- Is gentosha.jp secure (HTTPS)?
- Yes. gentosha.jp uses TLS 1.2 with a certificate issued by Amazon, valid until Feb 28, 2027.
- Who hosts gentosha.jp?
- gentosha.jp is hosted on AWS.
- What is gentosha.jp's SEO score?
- gentosha.jp scored 60/100 for SEO in the latest analysis (fair).
- What is gentosha.jp's overall website score?
- gentosha.jp has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card