daido.co.jp

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

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daido.co.jp

Mobile

Sponsored

Hosting Provider

SAKURA

IP Address

153.120.92.226

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Osaka, Japan

ASN

AS7684

Organization

SAKURA

Server

Apache

Nameservers

ns.daido.co.jp.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

382 ms10%

Speed Index

497 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

98 KB

89 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SAKURA

Technology Stack

11 Technologies Detected

Analytics

Frameworks

Libraries

Other

UI Components

Fonts

Tag Managers

Advertising

Web Servers

SEO Analysis

C61/100

Meta Tags7/15

Content9/12

Headings3/8

Technical15/25

E-E-A-T0/7

Images5/7

Links5/5

URL5/5

Social3/5

Freshness2/4

Mobile4/4

Indexability3/3

daido.co.jpdaido.co.jp

大同特殊鋼

「モノづくりは、未来づくり」大同特殊鋼のコーポレートサイトです。企業情報、製品情報、株主・投資家情報、社会・環境活動などの情報をご覧いただけます。

Title Length5 chars

Recommended: 50-60 chars (~31px / 580px)

Description Length73 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,511 URLs

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

3/100

Poor

1 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

D41/100

Bot Access

20/25

Machine Read.

10/25

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

navheader/footer

Text ratio:7%

Words:388

Token eff.:Optimal

Sections/1K:105.7

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.5w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

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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.

60/100

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

7/15

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

6/15

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

ARIA & Roles

4/15

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.

57/100

A+

12 mg

CO₂e / view

98.4 KB

Page Weight

95%

Cleaner Than

New Visitor

14 mg

Returning (cached)

7 mg

Annual (10K/mo)

1.5 kg

Emission Segments

Data Center

3 mg

Network

3 mg

Device

7 mg

Resource Breakdown

HTML

70.4 KB

Other

28.0 KB

Green Hosting Not Verified

SAKURA

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

226d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

02.12.2025

Valid Until

02.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.daido.co.jpdaido.co.jp

SHA-256 Fingerprint

B1:EB:77:3A:10:B8:40:DF:EF:C8:B1:2D:85:6E:87:82:07:9A:60:9E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

Content-Type

access-control-allow-origin

https://www.daido.co.jp

connection

Keep-Alive

content-security-policy

img-src * data:; frame-src 'self' 'unsafe-inline' 'unsafe-ev...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxa-00a42001.gslb.pphosted.com

mxb-00a42001.gslb.pphosted.com

Domain Information

daido.co.jp

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

67/100

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=1.0

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Yu Gothic

WCAG Partial

58/100

Readability

/30

20/30

16px · LH 1.88

Hierarchy

/20

8/20

WCAG

/25

12/25

3.59:1 min contrast

Performance

/25

18/25

2 fonts · 4 req

Heading Font

Yu Gothic

Sans

Body Font

Yu Gothic

Sans16px

Contrast Ratio

3.59:1

1 issue

Reading Comfort

~44 CPL

Narrow lines

34px

16px

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

⚠️ Wide line spacing (1.88). 1.4–1.6 is optimal for body text.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.6:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

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

GGoogle Fonts Buy on MyFonts

Color Palette

7 unique colors

5.66:1 AA Light

#eaeaea

Background· 27.8%

#655856

Secondary· 7.1%

#e0fcfc

Primary· 23%

#91bab2

Secondary· 8.1%

#b9d8db

Secondary· 7.3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

29 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)googletagmanager.com(6)img.ak.impact-ad.jp(2)penta.a.one.impact-ad.jp(1)static.ads-twitter.com(1)

Website Identity

daido.co.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

X (Twitter)Instagram

Sponsored

Last analyzed: 21 May 2026 at 00:32

Historical Analysis & Change Tracking