books.or.jp

https://books.or.jp· First analyzed 10 May 2026· Updated 10 May 2026

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books.or.jp

Mobile

Sponsored

Hosting Provider

SUURI-KEIKAKU CO., LTD.

IP Address

210.236.235.102

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS4725

Organization

SUURI-KEIKAKU CO., LTD.

Server

Apache

Nameservers

ns-904.awsdns-49.net.ns-1443.awsdns-52.org.ns-1764.awsdns-28.co.uk.ns-480.awsdns-60.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.4 s10%

Speed Index

1.9 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6.1 MB

34 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SUURI-KEIKAKU CO., LTD.

Technology Stack

5 Technologies Detected

Analytics

Libraries

CSS Frameworks

Web Servers

SEO Analysis

D54/100

Meta Tags4/15

Content9/12

Headings8/8

Technical11/21

E-E-A-T3/7

Images4/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

books.or.jpbooks.or.jp

本の総合カタログBooks 出版書誌データベース

No description available for this page.

Title Length24 chars

Recommended: 50-60 chars (~148px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

8 issues found

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Local SEO

Local Search Readiness

7/100

Poor

2 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.

7/25

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

header/footer

Text ratio:3%

Words:274

Token eff.:Too Short

Sections/1K:29.2

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1w

Canonical URL

Open Graph0/3

Twitter Card0/3

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.

87/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

18/20

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

10/15

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

1 recommendation

•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.

9/100

770 mg

CO₂e / view

6.1 MB

Page Weight

Cleaner Than

New Visitor

880 mg

Returning (cached)

440 mg

Annual (10K/mo)

92.4 kg

Emission Segments

Data Center

172 mg

Network

185 mg

Device

413 mg

Resource Breakdown

JavaScript

68.3 KB

Images

4.0 KB

CSS

6.0 MB

HTML

55.1 KB

Green Hosting Not Verified

SUURI-KEIKAKU CO., LTD.

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

113d

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

10.03.2026

Valid Until

31.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.books.or.jpbooks.or.jp

SHA-256 Fingerprint

BE:91:AE:27:2E:82:45:84:CF:D4:76:58:16:4A:DA:4C:C9:BF:E9:81...

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

Sun, 10 May 2026 00:03:54 GMT

keep-alive

timeout=5, max=100

server

Apache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.books.or.jp

Domain Information

books.or.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.

53/100

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, minimum-scale=1, user-scalable=yes

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

NotoSansJP-Regular

WCAG Partial

67/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

17/20

2x ratio · ✓ H1→H6

WCAG

/25

14/25

4.32:1 min contrast

Performance

/25

15/25

1 font · 1 req

Heading Font

NotoSansJP-Regular

Sans32px

Body Font

NotoSansJP-Regular

Sans16px

Contrast Ratio

4.32:1

3 issues

Reading Comfort

Single Font Family

left aligned

32px

36px

30px

16px

Minor Second

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 4.3:1).

✅ 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.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

5 unique colors

Light

#ffffff

Background· 41.4%

#fff7e2

Primary· 44.5%

#f3e6c2

Accent· 7.7%

#a35146

Secondary· 3.2%

#cbbaa4

Secondary· 3.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)googletagmanager.com(2)google-analytics.com(1)ajax.googleapis.com(1)

Website Identity

books.or.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 10 May 2026 at 00:04

Historical Analysis & Change Tracking