heibonsha.co.jp

https://heibonsha.co.jp· First analyzed 14 May 2026· Updated 14 May 2026

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heibonsha.co.jp

Mobile

Sponsored

Hosting Provider

Sony Network Communications Inc.

IP Address

182.169.74.66

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tokyo, Japan

ASN

AS2527

Organization

Sony Network Communications Inc.

Server

Nginx

Nameservers

regulus.dyna-ns.com.arcturus.dyna-ns.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5 MB

93 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Sony Network Communications Inc.

Technology Stack

5 Technologies Detected

Analytics

Libraries

Web Servers

SEO Analysis

D46/100

Meta Tags4/15

Content12/12

Headings1/8

Technical9/25

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

heibonsha.co.jpheibonsha.co.jp

平凡社

No description available for this page.

Title Length3 chars

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

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

15 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

16,938 URLs

robots.txt

11 rules

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

F33/100

Bot Access

20/25

Machine Read.

12/25

Schema Data

0/25

Citation

1/25

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. lists

Text ratio:22%

Words:749

Token eff.:Optimal

Sections/1K:30.7

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.9w

Canonical URL

Open Graph0/3

Twitter Card0/3

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

11/20

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

Forms & Inputs

10/15

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...

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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

637 mg

CO₂e / view

5.0 MB

Page Weight

15%

Cleaner Than

New Visitor

728 mg

Returning (cached)

364 mg

Annual (10K/mo)

76.5 kg

Emission Segments

Data Center

142 mg

Network

153 mg

Device

342 mg

Resource Breakdown

JavaScript

103.3 KB

Images

4.9 MB

CSS

15.8 KB

HTML

58.6 KB

Green Hosting Not Verified

Sony Network Communications Inc.

9 recommendations

•Carbon footprint recommendation preview...

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Security Score

31%Critical

Interactive

HTTPS

No WAF

170d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Nijimo, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

16.04.2026

Valid Until

31.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.heibonsha.co.jpheibonsha.co.jp

SHA-256 Fingerprint

CC:5B:50:D6:1D:BB:30:31:B4:2C:F2:A2:CB:02:E7:FB:68:2A:0D:AB...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-type

text/html

date

Thu, 14 May 2026 00:06:34 GMT

server

nginx/1.28.0

vary

Accept-Encoding,User-Agent

x-cache-status

HIT

x-frame-options

SAMEORIGIN

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

MX Records (1)

heibonsha-co-jp.mail.protection.outlook.com

Domain Information

heibonsha.co.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

30/100

Not 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.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

ヒラギノ角ゴ Pro W3

WCAG Partial

58/100

Readability

/30

13/30

12px · LH 1.50

Hierarchy

/20

12/20

1x ratio · ✓ H1→H6

WCAG

/25

19/25

3.5:1 min contrast

Performance

/25

14/25

1 font

Heading Font

ヒラギノ角ゴ Pro W3

Sans12px

Body Font

ヒラギノ角ゴ Pro W3

Sans12px

Contrast Ratio

3.5:1

1 issue

Reading Comfort

~80 CPL

Wide lines

12px

20px

12px

Perfect Fourth

Scale

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

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

⚠️ Wide lines: ~80 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.5:1).

✅ 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.

Buy on MyFonts

Color Palette

8 unique colors

2.6:1 Fail Light

#ffffff

Background· 53.49999999999999%

#ac9da1

Secondary· 5.4%

#01010b

Primary· 18.600000000000005%

#132c5c

Accent· 8.8%

#ea025b

Accent· 4.8%

#4f465c

Secondary· 3.9%

#f3f0e7

Secondary· 3.7%

#4e0f37

Accent· 1.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

.(5)googletagmanager.com(3)google-analytics.com(2)platform.twitter.com(2)

Website Identity

heibonsha.co.jp

Location detected: 🇯🇵 Japanvia tld

📧 Microsoft 365

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 14 May 2026 at 00:07

Historical Analysis & Change Tracking