club-quattro.com

https://club-quattro.com· First analyzed 17 May 2026· Updated 17 May 2026

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club-quattro.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.33.235.122

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Apache

CDN

CloudFront

Nameservers

ns-1404.awsdns-47.org.ns-197.awsdns-24.com.ns-2032.awsdns-62.co.uk.ns-984.awsdns-59.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.7 s10%

Speed Index

2.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

23.2 MB

73 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

8 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

C65/100

Meta Tags9/15

Content12/12

Headings3/8

Technical16/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

club-quattro.comclub-quattro.com

CLUB QUATTRO（クラブクアトロ）公式サイト

CLUB QUATTRO(クラブクアトロ)の公式サイトです。クラブクアトロはジャンルや国内外にこだわらず「いい音楽」「いいライブ」をクラブスタイルで楽しむことをコンセプトにした、渋谷・名古屋・梅田・広島の4大都市で運営するライブハウスです。

Title Length26 chars

Recommended: 50-60 chars (~166px / 580px)

Description Length120 chars

Recommended: 120-160 chars

Issues (1)

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

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

35 URLs

robots.txt

Local SEO

Local Search Readiness

14/100

Poor

4 13 1

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

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

17/25

Schema Data

2/25

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

Text ratio:4%

Words:702

Token eff.:Optimal

Structured Data

1 JSON-LD

WebSite

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 1w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

79/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

18/20

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

7/15

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.

38/100

2.40 g

CO₂e / view

23.2 MB

Page Weight

Cleaner Than

New Visitor

2.74 g

Returning (cached)

1.37 g

Annual (10K/mo)

287.6 kg

Emission Segments

Data Center

117 mg

Network

704 mg

Device

1.58 g

Resource Breakdown

JavaScript

96.0 KB

Images

22.8 MB

CSS

222.0 KB

Fonts

30.4 KB

HTML

10.5 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Interactive

HTTPS

No WAF

177d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.04.2026

Valid Until

10.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

club-quattro.comwww.club-quattro.com

SHA-256 Fingerprint

30:22:5E:BF:11:3C:77:50:70:83:90:BD:EC:C9:4F:7C:BF:FF:E3:7E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-encoding

📦 Gzip(gzip)

content-length

10482

content-security-policy

default-src 'self' https://*.cdninstagram.com https://*.sc-c...

content-type

text/html; charset=UTF-8

date

Sun, 17 May 2026 05:44:27 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.club-quattro.com

Domain Information

club-quattro.com

Domain Age

20y 1m

Created

14.04.2006

Expires

14.04.2027

Last Updated

29.03.2026

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

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.

61/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Noto Sans JP

WCAG AAA

76/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

12/20

1x ratio · ✓ H1→H6

WCAG

/25

20/25

16.59:1 min contrast

Performance

/25

20/25

2 fonts · 1 req

Heading Font

Noto Sans JP

Sans16px

Body Font

Noto Sans JP

Sans16px

Contrast Ratio

16.59:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines

16px

50px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 44/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 16.6:1).

✅ 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.

GGoogle Fonts Buy on MyFontsFluid TypeFlesch 44

Color Palette

10 unique colors

3.05:1 AA Large Dark

#343334

Other· 20.8%

#7f7c7f

Other· 4.4%

#401416

Primary· 11.2%

#7e121d

Accent· 6.7%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)googletagmanager.com(2)google-analytics.com(1)sitectl.athp.transer.com(1)

Website Identity

CLUB QUATTRO（クラブクアトロ）公式サイト

20 years old

Location detected: 🇺🇸 United Statesvia ip

GMO Internet Group, Inc. d/b/a Onamae.comja

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 17 May 2026 at 05:44

Historical Analysis & Change Tracking