chikumashobo.co.jp

https://chikumashobo.co.jp· First analyzed 05 May 2026· Updated 05 May 2026

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chikumashobo.co.jp

Mobile

Sponsored

Hosting Provider

Yahoo Japan Corporation

IP Address

210.152.127.66

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Kitakyushu, Japan

ASN

AS4694

Organization

Yahoo Japan Corporation

Server

Apache

Nameservers

skydns13.otsuka-office365.jp.skydns11.otsuka-office365.jp.skydns12.otsuka-office365.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.9 s10%

Speed Index

2.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5.9 MB

115 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Yahoo Japan Corporation

Technology Stack

9 Technologies Detected

Libraries

UI Components

Analytics

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

D50/100

Meta Tags5/15

Content0/12

Headings3/8

Technical14/21

E-E-A-T0/7

Images6/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

chikumashobo.co.jpchikumashobo.co.jp

筑摩書房

筑摩書房の公式ウェブサイト。新刊案内、書籍検索、パブ情報、採用情報、イベントや文学賞の案内。

Title Length4 chars

Recommended: 50-60 chars (~24px / 580px)

Description Length46 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (4 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

6 issues found

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Local SEO

Local Search Readiness

11/100

Poor

3 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F36/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

0/25

Citation

11/25

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

nav

Text ratio:1%

Words:232

Token eff.:Too Short

Sections/1K:4.3

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

64/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

17/20

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

Forms & Inputs

2/15

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

3/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

9/15

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.

16/100

747 mg

CO₂e / view

5.9 MB

Page Weight

Cleaner Than

New Visitor

853 mg

Returning (cached)

427 mg

Annual (10K/mo)

89.6 kg

Emission Segments

Data Center

167 mg

Network

179 mg

Device

401 mg

Resource Breakdown

JavaScript

529.5 KB

Images

4.2 MB

CSS

632.8 KB

HTML

413.2 KB

Other

121.0 KB

Green Hosting Not Verified

Yahoo Japan Corporation

10 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

118d

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

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

31.07.2025

Valid Until

31.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.chikumashobo.co.jpchikumashobo.co.jp

SHA-256 Fingerprint

9F:3F:F0:C6:69:75:62:E4:98:F9:F2:9B:F8:94:31:63:F3:F5:0E:39...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-type

text/html; charset=UTF-8

date

Tue, 05 May 2026 00:56:55 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

server

Apache

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

MX Records (1)

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

Domain Information

chikumashobo.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.

76/100

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

Typography & Readability

YakuHanJPs

WCAG Partial

63/100

Readability

/30

16/30

14px · LH 1.80

Hierarchy

/20

11/20

1.14x ratio · ✓ H1→H6

WCAG

/25

18/25

1.7:1 min contrast

Performance

/25

18/25

2 fonts · 6 req

Heading Font

YakuHanJPs

Sans16px

Body Font

YakuHanJPs

Sans14px

Contrast Ratio

1.7:1

10 issues

Reading Comfort

Single Font Family

left aligned

16px

12px

22px

10px

14px

Major Second

Scale

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

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.7:1).

✅ 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.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

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

Buy on MyFontsFluid Type (rem)

Color Palette

8 unique colors

Light

#ffffff

Background· 50.199999999999996%

#eddebd

Primary· 6.2%

#4f2021

Secondary· 6.1%

#f2d79e

Accent· 5.7%

#8a6a6f

Secondary· 5.2%

#c0b5a5

Secondary· 4.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)googletagmanager.com(1)code.jquery.com(1)unpkg.com(1)cdn.jsdelivr.net(1)

Website Identity

chikumashobo.co.jp

〒111-8755東京都台東区蔵前2-5-3

Location detected: 🇯🇵 Japanvia tld

📧 Microsoft 365jp

Sponsored

Last analyzed: 05 May 2026 at 00:57

Historical Analysis & Change Tracking