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cerezo.jp

https://cerezo.jp· First analyzed 12 May 2026· Updated 12 May 2026
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cerezo.jp
Desktop screenshot of cerezo.jp
Mobile screenshot of cerezo.jp
Mobile

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Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.21

Site Location

🇯🇵 Japanvia tld

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

ns-869.awsdns-44.net.ns-1172.awsdns-18.org.ns-1801.awsdns-33.co.uk.ns-313.awsdns-39.com.

Performance

86

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%
2.3 MB
250 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Platform
Vercel

Technology Stack

10 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft Clarity

Meta Frameworks

1
Next.js

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Platforms

1
Vercel

SEO Analysis

D58/100
15
9
1
Meta Tags10/15
Content8/12
Headings3/8
Technical14/21
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile1/4
Indexability3/3
C
cerezo.jpcerezo.jp

セレッソ大阪オフィシャルウェブサイト | Cerezo OSAKA

【公式】セレッソ大阪のオフィシャルサイトです。公式サイトでは試合速報やスケジュール、チケット情報、イベント情報、ファンクラブ案内、グッズ情報、チームや選手の最新情報などをご覧いただけます。

Title Length33 chars

Recommended: 50-60 chars (~205px / 580px)

Description Length94 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

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.

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AI & LLM Readiness

F35/100
Bot Access
20/25
Machine Read.
4/25
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
nav
Text ratio:1%
Words:253
Token eff.:Too Short
Sections/1K:4
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 2w
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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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.
B
73/100
12
Passed
4
Critical
3
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
12/15
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
11/15
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.
5 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
55/100
D
236 mg
CO₂e / view
2.3 MB
Page Weight
50%
Cleaner Than
New Visitor
269 mg
vs
Returning (cached)
135 mg
Annual (10K/mo)
28.3 kg
Emission Segments
Data Center
12 mg
Network
69 mg
Device
155 mg
Resource Breakdown
JavaScript
837.8 KB
Images
669.5 KB
CSS
730.9 KB
Fonts
71.9 KB
HTML
14.2 KB
Other
8.9 KB
Green Hosting Verified
Vercel
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

65d

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

17.04.2026

Valid Until

16.07.2026

Subject Alternative Names (1)

www.cerezo.jp

SHA-256 Fingerprint

F3:E9:9A:C8:C4:60:06:79:F0:E7:F3:BE:32:F6:51:91:BA:21:10:6B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age
0
cache-control
🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)
content-encoding
⚡ Brotli(br)
content-type
text/html; charset=utf-8
date
Tue, 12 May 2026 04:11:18 GMT
etag
W/"knza4fdsj820zx"
Good Warning Issue

Email Infrastructure

Google Workspace

Score

45

SPF
DKIM
DMARC

MX Records (5)

alt2.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx.l.google.com
alt3.aspmx.l.google.com

+1 more

Domain Information

cerezo.jp

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
C
60/100
Mobile Friendly2 breakpoints
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Apple Color Emoji

WCAG AA
57/100
Readability
/30
14/30

12px · LH 1.33

Hierarchy
/20
8/20
WCAG
/25
19/25

5.08:1 min contrast

Performance
/25
16/25

1 font · 4 req

Heading Font

Apple Color Emoji

Sans

Body Font

Apple Color Emoji

Sans12px

Contrast Ratio

5.08:1

WCAG AA (≥4.5:1)

Reading Comfort

Single Font Family

left aligned
16px
h2
12px
p

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.1:1).

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

✅ Lean font stack: 1 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFonts

Color Palette

12 unique colors
Light
#ffffff
Text· 11.3%
#db005c
Primary· 25.8%
#0d1829
Accent· 12.5%
#f6bdc9
Accent· 7.5%
#ab1756
Accent· 7.4%
#28516e
Secondary· 6.9%
#1e344b
Secondary· 6.6%
#4c1535
Accent· 6.3%

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

1
MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

3

Categories

5

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

26 Resources

20
Scripts
6
Styles
18
Async
3
Defer

Top Script Sources

googletagmanager.com(6)munchkin.marketo.net(2)cse.google.com(2)connect.facebook.net(2)local(2)

Website Identity

cerezo.jp

Location detected: 🇯🇵 Japanvia tld
📧 Google Workspaceja

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Last analyzed: 12 May 2026 at 04:11

Historical Analysis & Change Tracking