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zyuken.net

https://zyuken.net· First analyzed 24 May 2026· Updated 24 May 2026
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zyuken.net
Desktop screenshot of zyuken.net
Mobile screenshot of zyuken.net
Mobile

Sponsored

Hosting Provider

Sony Network Communications Inc.

IP Address

159.28.220.139

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Minamimotomachi, Japan

ASN

AS2527

Organization

Sony Network Communications Inc.

Server

Apache

Nameservers

ns1.value-domain.com.ns2.value-domain.com.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
118 KB
13 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Sony Network Communications Inc.

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.7.1

Web Servers

1
Apache

SEO Analysis

D58/100
16
10
1
Meta Tags7/15
Content12/12
Headings3/8
Technical15/25
E-E-A-T3/7
Images5/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
Z
zyuken.netzyuken.net

高校受験ナビ - 高校偏差値・掲示板（全国高校入試）

高校受験ナビは高校偏差値などの情報を一覧や検索から探せる高校案内サイトです。全国の高校の掲示板や高校受験の勉強法、模試や面接の対策、塾や家庭教師の情報など。

Title Length26 chars

Recommended: 50-60 chars (~161px / 580px)

Description Length78 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

11 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

6 rules

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F38/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
7/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:13%
Words:499
Token eff.:Optimal
Sections/1K:24
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.1w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
C
63/100
7
Passed
4
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
7/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
64/100
A+
15 mg
CO₂e / view
117.9 KB
Page Weight
95%
Cleaner Than
New Visitor
17 mg
vs
Returning (cached)
8 mg
Annual (10K/mo)
1.8 kg
Emission Segments
Data Center
3 mg
Network
4 mg
Device
8 mg
Resource Breakdown
JavaScript
30.3 KB
Images
68.0 KB
CSS
8.7 KB
HTML
10.9 KB
Green Hosting Not Verified
Sony Network Communications Inc.
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

26%Critical
Interactive

HTTPS

No WAF

33d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

11.06.2025

Valid Until

26.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.zyuken.netzyuken.net

SHA-256 Fingerprint

B8:42:4E:1E:DF:48:B1:62:84:CC:81:BD:05:BA:7C:A2:42:96:1B:7A...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🟡 1200s(max-age=1200)
content-encoding
📦 Gzip(gzip)
content-length
10825
content-type
text/html
date
Sun, 24 May 2026 14:21:55 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (7)

ASPMX2.GOOGLEMAIL.COM
ASPMX4.GOOGLEMAIL.COM
ASPMX.L.GOOGLE.COM
ALT1.ASPMX.L.GOOGLE.COM

+3 more

Domain Information

zyuken.net

Domain Age
20y 1m

Created

11.04.2006

Expires

11.04.2027

Last Updated

12.03.2026

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
C
64/100
Mobile Friendly4 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, maximum-scale=5
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Hiragino Kaku Gothic Pro

WCAG Partial
56/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
8/20
WCAG
/25
13/25

4.48:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Hiragino Kaku Gothic Pro

Sans

Body Font

Hiragino Kaku Gothic Pro

Sans16px

Contrast Ratio

4.48:1

10 issues

Reading Comfort

~45 CPL

Optimal (45–75)
18px
h2
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line length: ~45 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 4.5:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFonts

Color Palette

6 unique colors
4.58:1 AA Light
#ffffff
Background· 84.49999999999999%
#727582
Other· 3.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

8 Resources

5
Scripts
3
Styles
4
Async
0
Defer

Top Script Sources

googletagmanager.com(2)google-analytics.com(1)zyuken.net(1)ajax.googleapis.com(1)

Website Identity

zyuken.net

20 years old
Location detected: 🇯🇵 Japanvia ip
Key-Systems GmbH📧 Google Workspaceja

Sponsored

Last analyzed: 24 May 2026 at 14:22

Historical Analysis & Change Tracking