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3331.jp

https://3331.jp· First analyzed 12 May 2026· Updated 12 May 2026
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3331.jp
Desktop screenshot of 3331.jp
Mobile screenshot of 3331.jp
Mobile

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Hosting Provider

HETEML

IP Address

157.7.189.64

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS7506

Organization

HETEML

Server

Apache

Nameservers

dns01.muumuu-domain.com.dns02.muumuu-domain.com.

Performance

90

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
1.9 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
22 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
HETEML

Technology Stack

8 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Web Servers

1
Apache

Languages

1
PHPv7.1.33

SEO Analysis

D50/100
13
8
2
Meta Tags7/15
Content8/12
Headings3/8
Technical9/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
3
3331.jp3331.jp

3331

3331は、＜アート×産業×コミュニティ＞の理念のもと、人とまちの創造力を育み、地域を守り、豊かな文化資本を形成する多彩なアートプロジェクトや、アート事業を行う活動体です。

Title Length4 chars

Recommended: 50-60 chars (~22px / 580px)

Description Length86 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (5/6) — critical for accessibility and SEO

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.

Sponsored

AI & LLM Readiness

F34/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
6/25

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:13%
Words:94
Token eff.:Too Short
Sections/1K:60
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
C
62/100
9
Passed
3
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
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.
3 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.
28/100
D
262 mg
CO₂e / view
2.1 MB
Page Weight
50%
Cleaner Than
New Visitor
300 mg
vs
Returning (cached)
150 mg
Annual (10K/mo)
31.5 kg
Emission Segments
Data Center
59 mg
Network
63 mg
Device
141 mg
Resource Breakdown
JavaScript
32.1 KB
Images
1.1 MB
CSS
816.9 KB
Fonts
118.8 KB
HTML
6.5 KB
Green Hosting Not Verified
HETEML
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

48d

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

01.04.2026

Valid Until

30.06.2026

Subject Alternative Names (20)

3331.jp90s-archive.3331.jpaction.3331.jpair.3331.jpalternative-kazukokoike.3331.jpam.3331.jpartfair-dev.3331.jpartfair.3331.jp+12 more

SHA-256 Fingerprint

07:16:E4:91:2F:FC:B6:36:08:8C:4D:7B:68:D3:B0:FF:0B:C5:DC:2C...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
none
content-encoding
📦 Gzip(gzip)
content-length
6364
content-type
text/html; charset=UTF-8
date
Tue, 12 May 2026 11:05:57 GMT
server
Apache
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (2)

mx-proxy501.heteml.jp
mx-proxy502.heteml.jp

Domain Information

3331.jp

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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 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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Hiragino Sans

WCAG AAA
77/100
Readability
/30
18/30

14px · LH 1.80

Hierarchy
/20
15/20

1.07x ratio · ✓ H1→H6

WCAG
/25
24/25

12.63:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

Hiragino Sans

Sans15px

Body Font

Hiragino Sans

Sans14px

Contrast Ratio

12.63:1

WCAG AAA (≥7:1)

Reading Comfort

~49 CPL

Optimal (45–75)
15px
h1
42px
h2
14px
p

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

✅ Optimal line length: ~49 chars/line (ideal 45–75 CPL).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 12.6:1).

✅ 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.

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

GGoogle FontsBuy on MyFonts

Color Palette

8 unique colors
4.2:1 AA Large Light
#f8f8f8
Background· 41.3%
#80747c
Other· 12.6%
#26252d
Primary· 11.8%
#d5cbbb
Secondary· 5.6%
#fcefb8
Accent· 0.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

9 Resources

6
Scripts
3
Styles
4
Async
0
Defer

Top Script Sources

googletagmanager.com(3)local(2)google-analytics.com(1)

Website Identity

3331.jp

Location detected: 🇯🇵 Japanvia tld

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Last analyzed: 12 May 2026 at 11:06

Historical Analysis & Change Tracking