libro-koseisha.co.jp

https://libro-koseisha.co.jp· First analyzed 04 Jun 2026· Updated 04 Jun 2026

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Mobile

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Hosting Provider

Oracle Cloud

oracle.com/cloud

IP Address

151.145.71.17

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tokyo, Japan

ASN

AS31898

Organization

Oracle Cloud Infrastructure (ap-tokyo-1)

Server

Apache

Nameservers

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint

451 ms10%

Speed Index

586 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

75 KB

141 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPressv6.9.4

Infrastructure

Hosting

Oracle Cloud

Technology Stack

11 Technologies Detected

Plugins

Wordpress Popular Posts

CSS Frameworks

Analytics

UI Components

Icon Libraries

Web Servers

Languages

SEO Analysis

C63/100

Meta Tags13/15

Content7/12

Headings1/8

Technical19/25

E-E-A-T0/7

Images3/7

Links4/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

libro-koseisha.co.jplibro-koseisha.co.jp

皓星社（こうせいしゃ）図書出版とデータベース | 皓星社（こうせいしゃ）図書出版とデータベース

出版社・皓星社（こうせいしゃ）のサイトです。人文社会科学系の書籍を出版しています。創業は1979年。シリーズ紙礫、挿絵叢書、中学生から読める！、月光叢書、ハンセン病文学全集、等。雑誌記事索引データベース「ざっさくプラス」を提供。

Title Length48 chars

Recommended: 50-60 chars (~295px / 580px)

Description Length114 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

11 URLs

11 sub-sitemaps

robots.txt

4 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

F35/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

7/25

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. listsnavheader/footer

Text ratio:3%

Words:159

Token eff.:Too Short

Sections/1K:37.7

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph2/3

Twitter Card1/3

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.

71/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

20/20

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

11/15

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.

43/100

A+

9 mg

CO₂e / view

75.0 KB

Page Weight

95%

Cleaner Than

New Visitor

11 mg

Returning (cached)

5 mg

Annual (10K/mo)

1.1 kg

Emission Segments

Data Center

2 mg

Network

2 mg

Device

5 mg

Resource Breakdown

HTML

75.0 KB

Green Hosting Not Verified

Oracle Cloud

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

72d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

17.05.2026

Valid Until

15.08.2026

Subject Alternative Names (1)

libro-koseisha.co.jp

SHA-256 Fingerprint

D3:E5:16:4D:47:65:E6:C8:C9:AC:85:72:69:99:0B:2F:50:70:BF:62...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-type

text/html; charset=UTF-8

date

Thu, 04 Jun 2026 15:50:52 GMT

keep-alive

timeout=5, max=100

link

<https://libro-koseisha.co.jp/wp-json/>; rel="https://api.w....

server

Apache/2.4.37 (Oracle Linux Server) OpenSSL/1.1.1k mod_perl/...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

smtp.google.com

Domain Information

libro-koseisha.co.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.

69/100

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

Times New Roman

WCAG AAA

79/100

Readability

/30

22/30

16px · LH --

Hierarchy

/20

19/20

2x ratio · ✓ H1→H6

WCAG

/25

24/25

9.4:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~36 CPL

Narrow lines

32px

24px

19px

16px

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

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

✅ 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

6 unique colors

Light

#ffffff

Background· 95.60000000000001%

#9999d6

Primary· 0.9%

#c3c5e5

Secondary· 0.9%

#3a39d3

Accent· 0.8%

#dedded

Secondary· 0.5%

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

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

libro-koseisha.co.jp(6)googletagmanager.com(1)platform.twitter.com(1)

Website Identity