shogakukan.co.jp

https://shogakukan.co.jp· First analyzed 22 Apr 2026· Updated 22 Apr 2026

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shogakukan.co.jp

Mobile

Sponsored

Hosting Provider

SUURI-KEIKAKU CO., LTD.

IP Address

210.236.234.22

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS4725

Organization

SUURI-KEIKAKU CO., LTD.

Server

Nginx

Nameservers

ns-1861.awsdns-40.co.uk.ns-243.awsdns-30.com.ns-592.awsdns-10.net.ns-1071.awsdns-05.org.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.9 s10%

Speed Index

3.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

8.1 MB

86 requests

Image Optimization

Fastly Image Optimizer

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SUURI-KEIKAKU CO., LTD.

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Analytics

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

D47/100

Meta Tags7/15

Content3/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile1/4

Indexability3/3

shogakukan.co.jpshogakukan.co.jp

小学館

小学館公式サイト総合トップページ。小学館の会社情報、新刊案内、小学館が運営しているウェブコンテンツ、サービス、その他事業の詳しい内容、採用情報などを掲載。コミック・雑誌・書籍の検索もできます。

Title Length3 chars

Recommended: 50-60 chars (~18px / 580px)

Description Length96 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (1 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

11 issues found

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Crawlability

Sitemap

robots.txt

4 rules

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

F26/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

5/25

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

Text ratio:0%

Words:282

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

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.

2 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.

2/100

1.02 g

CO₂e / view

8.1 MB

Page Weight

Cleaner Than

New Visitor

1.17 g

Returning (cached)

586 mg

Annual (10K/mo)

123.0 kg

Emission Segments

Data Center

229 mg

Network

246 mg

Device

550 mg

Resource Breakdown

JavaScript

1.9 MB

Images

5.1 MB

CSS

52.0 KB

Fonts

907 B

HTML

1.0 MB

Green Hosting Not Verified

SUURI-KEIKAKU CO., LTD.

10 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

160d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Japan Registry Services Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

04.09.2025

Valid Until

30.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.shogakukan.co.jpshogakukan.co.jp

SHA-256 Fingerprint

67:81:35:9B:8A:79:94:40:F3:59:5B:E4:83:82:38:6C:BD:51:99:CB...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

connection

keep-alive

content-type

text/html; charset=utf-8

date

Wed, 22 Apr 2026 18:02:39 GMT

server

nginx

transfer-encoding

chunked

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx.securemx.jp

Domain Information

shogakukan.co.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

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.

74/100

Mobile Friendly54 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Hiragino Kaku Gothic ProN

WCAG Partial

56/100

Readability

/30

14/30

12px · LH 1.67

Hierarchy

/20

12/20

1.17x ratio · ✓ H1→H6

WCAG

/25

12/25

1:1 min contrast

Performance

/25

18/25

1 font · 1 req

Heading Font

Hiragino Kaku Gothic ProN

Sans14px

Body Font

Hiragino Kaku Gothic ProN

Sans12px

Contrast Ratio

1:1

4 issues

Reading Comfort

~48 CPL

Optimal (45–75)

14px

20px

12px

Augmented Fourth

Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~48 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

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

GGoogle Fonts Buy on MyFonts

Color Palette

11 unique colors

3.8:1 AA Large Light

#ffffff

Primary· 55.5%

#818387

Other· 4.2%

#1c84d8

Accent· 8.3%

#bddae2

Secondary· 6.2%

#ac2a27

Accent· 5.7%

#3dbced

Accent· 5.2%

#283c6b

Secondary· 3.8%

#dfc1a6

Secondary· 3.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)local(2)in.treasuredata.com(1)sync.im-apps.net(1)cf.im-apps.net(1)

Website Identity

shogakukan.co.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 22 Apr 2026 at 18:04

Historical Analysis & Change Tracking