seibundo-shinkosha.net

https://seibundo-shinkosha.net· First analyzed 13 May 2026· Updated 13 May 2026

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Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

52.195.86.208

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Tokyo, Japan

ASN

AS16509

Organization

AWS EC2 (ap-northeast-1)

Server

Apache

Nameservers

04.dnsv.jp.01.dnsv.jp.02.dnsv.jp.03.dnsv.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6.5 MB

161 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.0.5

cms

seibundov1.4Custom

by the WordPress team

View Theme

Technology Stack

13 Technologies Detected

Analytics

Plugins

Confirm Plus Contact Form 7

Cf7 Conditional Fields

Libraries

Other

CSS Frameworks

Tag Managers

Advertising

Web Servers

SEO Analysis

C67/100

Meta Tags9/15

Content12/12

Headings3/8

Technical19/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

seibundo-shinkosha.netseibundo-shinkosha.net

株式会社誠文堂新光社 | あなたの「好き」を、もっと深いところまで。そんな思いで１００年。

No description available for this page.

Title Length45 chars

Recommended: 50-60 chars (~276px / 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
• Most images missing alt text (199/200) — critical for accessibility and SEO

7 issues found

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Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

101 rules

Sitemap reference found

Local SEO

Local Search Readiness

6/100

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

D43/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

13/25

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. listsnav

Text ratio:3%

Words:510

Token eff.:Optimal

Sections/1K:3.9

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary21w

Descriptive Headingsavg 1.4w

Canonical URL

Open Graph2/3

Twitter Card2/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

62/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

13/20

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

0/15

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

4 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.

35/100

672 mg

CO₂e / view

6.5 MB

Page Weight

Cleaner Than

New Visitor

769 mg

Returning (cached)

384 mg

Annual (10K/mo)

80.7 kg

Emission Segments

Data Center

33 mg

Network

198 mg

Device

442 mg

Resource Breakdown

JavaScript

327.1 KB

Images

1.2 MB

CSS

5.0 MB

HTML

13.5 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

87d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.05.2026

Valid Until

08.08.2026

Subject Alternative Names (2)

seibundo-shinkosha.netwww.seibundo-shinkosha.net

SHA-256 Fingerprint

03:63:79:6C:BE:51:B4:FC:75:97:7F:81:C8:4A:68:B4:CE:D5:DE:F2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

none

cache-control

🟡 3s(max-age=3, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Wed, 13 May 2026 08:19:48 GMT

last-modified

Wed, 13 May 2026 07:54:12 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

seibundo-shinkosha.net

Domain Age

19y 4m

Created

10.01.2007

Expires

10.01.2027

Last Updated

25.12.2025

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

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.

60/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Noto Serif JP + 游ゴシック体

WCAG AA

63/100

Readability

/30

18/30

14px · LH 1.80

Hierarchy

/20

7/20

WCAG

/25

22/25

5.47:1 min contrast

Performance

/25

16/25

2 fonts

Heading Font

Noto Serif JP

Serif

Body Font

游ゴシック体

Sans14px

Contrast Ratio

5.47:1

WCAG AA (≥4.5:1)

Reading Comfort

~51 CPL

Optimal (45–75)

40px

14px

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

✅ Optimal line length: ~51 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.5:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 49

Color Palette

7 unique colors

12.02:1 AAA Light

#ffffff

Background· 43.800000000000004%

#3e3435

Secondary· 3.6%

#11171e

Primary· 28.3%

#dfe7e8

Secondary· 6.8%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

seibundo-shinkosha.net(11)googletagmanager.com(4)connect.facebook.net(2)google-analytics.com(1)static.ads-twitter.com(1)

Website Identity

seibundo-shinkosha.net

19 years old

Location detected: 🇯🇵 Japanvia ip

GMO Internet Group, Inc. d/b/a Onamae.comja

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 13 May 2026 at 08:20

Historical Analysis & Change Tracking