vessel.co.jp

https://vessel.co.jp· First analyzed 17 May 2026· Updated 17 May 2026

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vessel.co.jp

Mobile

Sponsored

Hosting Provider

UCOM Corp.

IP Address

113.36.225.20

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tarumachi, Japan

ASN

AS17506

Organization

UCOM Corp.

Server

Nginx

Nameservers

ns3.xserver.jp.ns2.xserver.jp.ns5.xserver.jp.ns4.xserver.jp.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

4.1 s10%

Speed Index

5.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3 MB

93 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

UCOM Corp.

Technology Stack

7 Technologies Detected

Analytics

Libraries

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

D49/100

Meta Tags5/15

Content9/12

Headings3/8

Technical11/21

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

vessel.co.jpvessel.co.jp

株式会社ベッセル｜VESSEL こたえるかなえる

ドライバー、ビット・ソケット、エアーツールなどの締めつけ工具から、工場内での静電気対策品まで幅広い商品群情報を満載

Title Length25 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length57 chars

Recommended: 120-160 chars

Issues (1)

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

11 issues found

Upgrade to view details

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

data-nosnippet

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:3%

Words:330

Token eff.:Optimal

Sections/1K:48.5

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary16w

Descriptive Headingsavg 1.4w

Canonical URL

Open Graph3/3

Twitter Card0/3

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.

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

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

6/15

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.

11/100

384 mg

CO₂e / view

3.0 MB

Page Weight

30%

Cleaner Than

New Visitor

438 mg

Returning (cached)

219 mg

Annual (10K/mo)

46.0 kg

Emission Segments

Data Center

86 mg

Network

92 mg

Device

206 mg

Resource Breakdown

JavaScript

49.3 KB

Images

2.9 MB

CSS

27.7 KB

HTML

7.8 KB

Other

8.3 KB

Green Hosting Not Verified

UCOM Corp.

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

52d

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/2

Valid From

10.04.2026

Valid Until

09.07.2026

Subject Alternative Names (2)

vessel.co.jpwww.vessel.co.jp

SHA-256 Fingerprint

3C:66:5C:30:2A:85:29:4B:45:E1:06:EA:B2:9B:06:10:76:88:E6:E4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sun, 17 May 2026 10:55:31 GMT

server

nginx

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

vessel.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.

51/100

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, minimum-scale=1, maximum-scale=1, user-scalable=no, shrink-to-fit=no

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

ヒラギノ角ゴ Pro W3

WCAG AA

56/100

Readability

/30

16/30

16px · LH 1.80

Hierarchy

/20

6/20

WCAG

/25

18/25

5.04:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

ヒラギノ角ゴ Pro W3

Sans

Body Font

ヒラギノ角ゴ Pro W3

Sans16px

Contrast Ratio

5.04:1

WCAG AA (≥4.5:1)

Reading Comfort

~43 CPL

Narrow lines

30px

24px

14px

16px

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.0:1).

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

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

Buy on MyFontsFlesch 53

Color Palette

5 unique colors

3.59:1 AA Large Light

#ffffff

Background· 70.8%

#898781

Other· 6.6%

#4a2f30

Primary· 5.5%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(5)local(4)cse.google.com(2)connect.facebook.net(2)google-analytics.com(2)

Website Identity

vessel.co.jp

Location detected: 🇯🇵 Japanvia tld

📧 Google Workspaceja

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 17 May 2026 at 10:56

Historical Analysis & Change Tracking

vessel.co.jp

株式会社ベッセル｜VESSEL こたえる かなえる

Accessibility

Carbon Footprint

Mobile Compatibility

Color Palette

vessel.co.jp

株式会社ベッセル｜VESSEL こたえるかなえる