taishukan.co.jp

https://taishukan.co.jp· First analyzed 21 May 2026· Updated 21 May 2026

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taishukan.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

asns2.customer.ne.jp.asns1.customer.ne.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.2 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

552 KB

79 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Shopify

ecommerce

Shopify Theme

Technology Stack

9 Technologies Detected

Analytics

Libraries

UI Components

CSS Frameworks

Fonts

Web Servers

Languages

SEO Analysis

C61/100

Meta Tags5/15

Content12/12

Headings3/8

Technical17/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

taishukan.co.jptaishukan.co.jp

株式会社大修館書店

1918年の創業以来、「後世に残る良書の出版」という理念の基に、辞書・教科書・専門書・専門雑誌等を出版しています。

Title Length9 chars

Recommended: 50-60 chars (~55px / 580px)

Description Length57 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

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Crawlability

Sitemap

Type: standard

6,684 URLs

robots.txt

56 rules

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

12/25

Machine Read.

11/25

Schema Data

0/25

Citation

12/25

AI Bot Access

6/14 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:7%

Words:923

Token eff.:Optimal

Sections/1K:3.3

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary700w

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

14/20

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

9/15

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.

2 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.

37/100

68 mg

CO₂e / view

551.9 KB

Page Weight

80%

Cleaner Than

New Visitor

78 mg

Returning (cached)

39 mg

Annual (10K/mo)

8.2 kg

Emission Segments

Data Center

15 mg

Network

16 mg

Device

37 mg

Resource Breakdown

JavaScript

283.6 KB

CSS

100.3 KB

Fonts

59.2 KB

HTML

108.8 KB

Green Hosting Not Verified

Sony Network Communications Inc.

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

238d

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

15.12.2025

Valid Until

14.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.taishukan.co.jptaishukan.co.jp

SHA-256 Fingerprint

CD:ED:82:AF:C2:E6:04:D8:E6:EF:B7:D2:CB:09:CD:3E:9B:B0:34:C6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔵 Public(public)

content-type

text/html; charset=utf-8

date

Thu, 21 May 2026 15:10:40 GMT

expires

-1

pragma

no-cache

server

nginx/1.28.0

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

v2301-228.mailsecure.jp

Domain Information

taishukan.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.

49/100

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.

Viewport

width=device-width, initial-scale=1.0

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system

WCAG Partial

59/100

Readability

/30

12/30

13px · LH 1.20

Hierarchy

/20

11/20

1.15x ratio · ✓ H1→H6

WCAG

/25

16/25

2.72:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Sans15px

Body Font

-apple-system

Sans13px

Contrast Ratio

2.72:1

1 issue

Reading Comfort

~40 CPL

Narrow lines

15px

26px

13px

Major Sixth

Scale

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.20). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.7:1).

✅ 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.

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle Fonts

Color Palette

7 unique colors

Light

#ffffff

Background· 56.5%

#43aad5

Primary· 11.4%

#322854

Secondary· 5.6%

#cadad7

Secondary· 5.1%

#7b8ca4

Secondary· 3.9%

#7eb4cc

Secondary· 1.9%

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(6)googletagmanager.com(3)google-analytics.com(2)

Website Identity

taishukan.co.jp

Location detected: 🇯🇵 Japanvia tld

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Last analyzed: 21 May 2026 at 15:11

Historical Analysis & Change Tracking