sun-denshi.co.jp

https://sun-denshi.co.jp· First analyzed 13 May 2026· Updated 13 May 2026

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sun-denshi.co.jp

Mobile

Sponsored

Hosting Provider

SAKURA

IP Address

219.94.155.241

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Osaka, Japan

ASN

AS9371

Organization

SAKURA

Server

Nginx

Nameservers

ns-478.awsdns-59.com.ns-573.awsdns-07.net.ns-1238.awsdns-26.org.ns-1846.awsdns-38.co.uk.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.0 s10%

Speed Index

1.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

12.9 MB

50 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

サン電子HPv1.0Custom

by サン電子

View Theme

Technology Stack

8 Technologies Detected

Analytics

Libraries

UI Components

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

B71/100

Meta Tags7/15

Content9/12

Headings3/8

Technical23/25

E-E-A-T2/7

Images5/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

sun-denshi.co.jpsun-denshi.co.jp

サン電子株式会社

IoT/M2MのITソリューション事業、情報セキュリティのデータインテリジェンス事業、遊技機やゲームコンテンツのアミューズメント事業を展開するサン電子株式会社のホームページです。

Title Length8 chars

Recommended: 50-60 chars (~49px / 580px)

Description Length89 chars

Recommended: 120-160 chars

Issues (1)

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

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

5 rules

Sitemap reference found

Local SEO

Local Search Readiness

17/100

Poor

5 12

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

Sponsored

AI & LLM Readiness

D52/100

Bot Access

20/25

Machine Read.

17/25

Schema Data

6/25

Citation

9/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

def. listsnavheader/footer

Text ratio:5%

Words:316

Token eff.:Optimal

Sections/1K:34.8

Depth:3/5

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbList

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.1w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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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.

75/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

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

9/15

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

ARIA & Roles

1/15

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.

25/100

1.63 g

CO₂e / view

12.9 MB

Page Weight

Cleaner Than

New Visitor

1.86 g

Returning (cached)

932 mg

Annual (10K/mo)

195.6 kg

Emission Segments

Data Center

364 mg

Network

391 mg

Device

875 mg

Resource Breakdown

JavaScript

45.9 KB

Images

885.1 KB

CSS

12.0 MB

Fonts

2.7 KB

HTML

10.2 KB

Green Hosting Not Verified

SAKURA

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

40d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

25.03.2026

Valid Until

23.06.2026

Subject Alternative Names (2)

sun-denshi.co.jpwww.sun-denshi.co.jp

SHA-256 Fingerprint

D8:F7:8E:33:E2:09:3A:8A:B8:2B:BF:C7:3C:D4:2E:82:55:3B:68:D4...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-length

10161

content-type

text/html; charset=UTF-8

date

Wed, 13 May 2026 10:41:28 GMT

server

nginx

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

sun-denshi.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.

65/100

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

Typography & Readability

Helvetica Neue

WCAG Partial

68/100

Readability

/30

15/30

14px · LH 1.86

Hierarchy

/20

15/20

2.29x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

22/25

System fonts

Heading Font

Helvetica Neue

Sans32px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

1:1

14 issues

Reading Comfort

~36 CPL

Narrow lines

32px

24px

28px

14px

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

⚠️ Wide line spacing (1.86). 1.4–1.6 is optimal for body text.

✅ Easy to read: Flesch score 82/100 — accessible to general audiences.

⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.3x larger than body text.

GGoogle FontsFlesch 82

Color Palette

7 unique colors

Light

#ffffff

Background· 66.6%

#104ba0

Primary· 6.4%

#ccf7fa

Accent· 6.2%

#e0e4f4

Secondary· 6%

#a1d0cf

Secondary· 5.1%

#6489c4

Secondary· 4.9%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sun-denshi.co.jp(3)googletagmanager.com(2)cdn.jsdelivr.net(1)

Website Identity

サン電子株式会社

Organization

www.sun-denshi.co.jp/

Location detected: 🇯🇵 Japanvia tld

📧 Google Workspaceja

Social Profiles

Facebook

Sponsored

Last analyzed: 13 May 2026 at 10:42

Historical Analysis & Change Tracking