cero.gr.jp

https://cero.gr.jp· First analyzed 30 May 2026· Updated 30 May 2026

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cero.gr.jp

Mobile

Sponsored

Hosting Provider

Future Spirits Co., Ltd.

IP Address

219.99.172.135

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS23824

Organization

Future Spirits Co., Ltd.

Server

Apache

Nameservers

dns3.asp-frontier.net.dns1.asp-frontier.net.dns2.asp-frontier.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.7 s10%

Speed Index

4.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

606 KB

89 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Future Spirits Co., Ltd.

Technology Stack

9 Technologies Detected

Analytics

Libraries

UI Components

CSS Frameworks

Icon Libraries

Fonts

Web Servers

Customer Support

SEO Analysis

C69/100

Meta Tags10/15

Content6/12

Headings1/8

Technical21/25

E-E-A-T7/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile1/4

Indexability3/3

cero.gr.jpcero.gr.jp

特定非営利活動法人コンピュータエンターテインメントレーティング機構（公式ホームページ）

特定非営利活動法人コンピュータエンターテインメントレーティング機構のトップページです

Title Length43 chars

Recommended: 50-60 chars (~266px / 580px)

Description Length42 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

24 URLs

robots.txt

5 rules

Local SEO

Local Search Readiness

16/100

Poor

4 14

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.

4/25

Schema Data

8/25

Citation

16/25

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:1%

Words:103

Token eff.:Too Short

Sections/1K:9.7

Depth:2/5

Structured Data

4 JSON-LD

Article×1.2Person×1.3(min)Organization×1.1

Citation Readiness

Opening Summary

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 (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.

61/100

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

5/15

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

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 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.

44/100

75 mg

CO₂e / view

606.3 KB

Page Weight

80%

Cleaner Than

New Visitor

86 mg

Returning (cached)

43 mg

Annual (10K/mo)

9.0 kg

Emission Segments

Data Center

17 mg

Network

18 mg

Device

40 mg

Resource Breakdown

JavaScript

188.4 KB

Images

136.8 KB

CSS

264.8 KB

HTML

15.4 KB

Other

949 B

Green Hosting Not Verified

Future Spirits Co., Ltd.

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

No WAF

80d

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/1.1

Valid From

20.05.2026

Valid Until

18.08.2026

Subject Alternative Names (2)

cero.gr.jpwww.cero.gr.jp

SHA-256 Fingerprint

0B:C5:DA:95:48:B5:98:E7:64:02:F7:20:05:CE:C0:FF:FF:C8:24:D3...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

15497

content-type

text/html; charset=UTF-8

date

Sat, 30 May 2026 19:03:50 GMT

keep-alive

timeout=5, max=100

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.cero.gr.jp

Domain Information

cero.gr.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

33/100

Not 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.

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Hiragino Kaku Gothic Pro + Meiryo

WCAG Partial

49/100

Readability

/30

18/30

14px · LH 1.50

Hierarchy

/20

7/20

WCAG

/25

12/25

2.39:1 min contrast

Performance

/25

12/25

4 fonts · 1 req

Heading Font

Hiragino Kaku Gothic Pro

Sans

Body Font

Meiryo

Sans14px

Contrast Ratio

2.39:1

18 issues

Reading Comfort

Dual Sans-Serif

left aligned

18px

14px

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

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

⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 2.4:1).

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

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

Buy on MyFonts

Color Palette

7 unique colors

Light

#ffffff

Background· 58.300000000000004%

#2690ac

Accent· 6.6%

#ccc6c0

Secondary· 6.5%

#d9eff5

Primary· 5.4%

#351112

Accent· 4.7%

#446279

Secondary· 3.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(16)googletagmanager.com(2)google-analytics.com(1)translate.googleapis.com(1)

Website Identity

特定非営利活動法人コンピュータエンターテインメントレーティング機構

Organization

03-5289-7928

www.cero.gr.jp/

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 30 May 2026 at 19:04

Historical Analysis & Change Tracking