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kawai-juku.ac.jp

https://kawai-juku.ac.jp· First analyzed 16 May 2026· Updated 16 May 2026
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kawai-juku.ac.jp
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Mobile

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Hosting Provider

Kawaijuku Educational Institution

IP Address

124.110.69.31

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Sashiōgi, Japan

ASN

AS2519

Organization

Kawaijuku Educational Institution

Server

Apache

Nameservers

ns.kawai-juku.ac.jp.ns.keinet.ne.jp.rjer.nn.kawai-juku.ac.jp.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
999 ms10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
5.2 MB
181 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Kawaijuku Educational Institution

Technology Stack

10 Technologies Detected

Advertising

4
Twitter AdsTikTok PixelMicrosoft AdvertisingOutbrain

Analytics

3
Google Analytics
Facebook PixelMicrosoft Clarity

Libraries

1
jQueryv3.2.1

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apache

SEO Analysis

C65/100
19
6
1
Meta Tags9/15
Content9/12
Headings3/8
Technical16/25
E-E-A-T3/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness2/4
Mobile4/4
Indexability3/3
K
kawai-juku.ac.jpkawai-juku.ac.jp

大学受験の予備校・塾 河合塾

東大・京大・早慶大など難関大や医学部をはじめ数々の大学・高校の合格実績が河合塾の自信です。高卒生や現役生、中高一貫、海外大進学、帰国生、通信制の学生ほか、英語や幼児教育も幅広くサポート。大学受験の予備校・塾、学校法人河合塾の公式サイトです。

Title Length14 chars

Recommended: 50-60 chars (~86px / 580px)

Description Length120 chars

Recommended: 120-160 chars

Issues (1)

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

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

13,736 URLs

robots.txt

Local SEO

Local Search Readiness

8/100
Poor
2 13 2

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

Sponsored

AI & LLM Readiness

D40/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
12/25

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
def. listsnavheader/footer
Text ratio:3%
Words:201
Token eff.:Too Short
Sections/1K:164.2
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.1w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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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
62/100
9
Passed
2
Critical
2
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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.
16/100
F
656 mg
CO₂e / view
5.2 MB
Page Weight
15%
Cleaner Than
New Visitor
749 mg
vs
Returning (cached)
375 mg
Annual (10K/mo)
78.7 kg
Emission Segments
Data Center
147 mg
Network
157 mg
Device
352 mg
Resource Breakdown
JavaScript
456.4 KB
Images
4.5 MB
CSS
262.0 KB
HTML
18.4 KB
Other
656 B
Green Hosting Not Verified
Kawaijuku Educational Institution
8 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

228d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Cybertrust Japan Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

01.12.2025

Valid Until

31.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

*.kawai-juku.ac.jpkawai-juku.ac.jpkjp-pm.oo.kawai-juku.ac.jp

SHA-256 Fingerprint

8F:01:02:50:28:7A:9B:93:7B:40:D8:57:C0:04:80:C8:77:AE:1F:61...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-length
18524
content-type
text/html;charset=UTF-8
date
Sat, 16 May 2026 21:52:20 GMT
server
Apache
vary
Accept-Encoding
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

kawaijuku-ac-jp01c.mail.protection.outlook.com

Domain Information

kawai-juku.ac.jp

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
D
50/100
Mobile Friendly1 breakpoint
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
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Meiryo

WCAG AA
70/100
Readability
/30
18/30

14px · LH 1.50

Hierarchy
/20
19/20

2x ratio · ✓ H1→H6

WCAG
/25
19/25

5.1:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Meiryo

Sans28px

Body Font

Meiryo

Sans14px

Contrast Ratio

5.1:1

WCAG AA (≥4.5:1)

Reading Comfort

~43 CPL

Narrow lines
28px
h1
19px
h2
20px
h3
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.1:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

Buy on MyFonts

Color Palette

11 unique colors
Light
#ffffff
Background· 55.1%
#39639c
Primary· 6.5%
#0d1f3c
Accent· 6.4%
#a5adc1
Secondary· 5.8%
#343355
Secondary· 5.6%
#60ba7f
Secondary· 4.5%
#6d6f94
Secondary· 4%
#e0d9d7
Secondary· 3.8%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

2
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

Advertising

3
Facebook PixelMid-Market
TikTok PixelMid-Market
Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

3

Categories

6

Total Tools

1

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

23 Resources

20
Scripts
3
Styles
20
Async
0
Defer

Top Script Sources

googletagmanager.com(5)analytics.tiktok.com(4)dsp.logly.co.jp(2)clarity.ms(2)connect.facebook.net(2)

Website Identity

kawai-juku.ac.jp

Location detected: 🇯🇵 Japanvia tld
📧 Microsoft 365ja

Sponsored

Last analyzed: 16 May 2026 at 21:53

Historical Analysis & Change Tracking