deagostini.jp

https://deagostini.jp· First analyzed 20 May 2026· Updated 20 May 2026

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deagostini.jp

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

52.198.217.79

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tokyo, Japan

ASN

AS16509

Organization

AWS EC2 (ap-northeast-1)

Server

Apache

Nameservers

ns-59.awsdns-07.com.ns-693.awsdns-22.net.ns-1463.awsdns-54.org.ns-1901.awsdns-45.co.uk.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.5 s10%

Speed Index

2.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

8.5 MB

147 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

Advertising

Google Ads Twitter Ads TikTok Pixel Criteo

Libraries

UI Components

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

D52/100

Meta Tags7/15

Content7/12

Headings3/8

Technical16/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

deagostini.jpdeagostini.jp

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Title Length10 chars

Recommended: 50-60 chars (~62px / 580px)

Description Length88 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (28/46) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,000 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

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

F32/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

3/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:2%

Words:125

Token eff.:Too Short

Sections/1K:56

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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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.

64/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

10/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

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

5/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 recommendations

•Accessibility recommendation preview...

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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.

24/100

878 mg

CO₂e / view

8.5 MB

Page Weight

Cleaner Than

New Visitor

1.00 g

Returning (cached)

502 mg

Annual (10K/mo)

105.4 kg

Emission Segments

Data Center

43 mg

Network

258 mg

Device

577 mg

Resource Breakdown

JavaScript

456.0 KB

Images

5.3 MB

CSS

2.7 MB

HTML

43.3 KB

Other

9.3 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

174d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.10.2025

Valid Until

11.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

deagostini.jp

SHA-256 Fingerprint

D8:46:9A:64:D1:7E:90:B2:AD:99:82:E8:C1:A5:7C:CF:0B:85:95:52...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

X-Requested-With,X-ValidationOnly,X-STKN

cache-control

🔴 No Cache(no-cache,no-store,must-revalidate,private)

content-type

text/html;charset=UTF-8

date

Wed, 20 May 2026 10:43:28 GMT

expires

-1

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail-mg10.msaas.jp

Domain Information

deagostini.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

52/100

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,initial-scale=1

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Noto Sans JP

WCAG Partial

56/100

Readability

/30

18/30

14px · LH 1.44

Hierarchy

/20

7/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

15/25

1 font · 3 req

Heading Font

Noto Sans JP

Sans

Body Font

Noto Sans JP

Sans14px

Contrast Ratio

1:1

10 issues

Reading Comfort

Single Font Family

left aligned

30px

14px

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

✅ Optimal line spacing: 1.44 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

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

Buy on MyFontsFluid Type

Color Palette

9 unique colors

14.38:1 AAA Light

#ffffff

Background· 17.6%

#292a2b

Other· 17.3%

#1c1616

Text· 25.400000000000002%

#055662

Primary· 10.2%

#c40a1d

Accent· 7.8%

#5f4441

Secondary· 6.2%

#5a070a

Accent· 5.3%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

TikTok PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(5)analytics.tiktok.com(3)dmp.im-apps.net(2)google-analytics.com(2)d.line-scdn.net(2)

Website Identity

deagostini.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 20 May 2026 at 10:43

Historical Analysis & Change Tracking