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prcm.jp

https://prcm.jp· First analyzed 20 May 2026· Updated 20 May 2026
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prcm.jp
Desktop screenshot of prcm.jp
Mobile screenshot of prcm.jp
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.164.206.102

Site Location

🇯🇵 Japanvia tld

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

UploadServer

CDN

CloudFront

Nameservers

ns-1910.awsdns-46.co.uk.ns-517.awsdns-00.net.ns-1291.awsdns-33.org.ns-147.awsdns-18.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
301 ms10%
Speed Index
391 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
46 KB
26 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

1 Technologies Detected

CSS Frameworks

1
Tailwind CSS

SEO Analysis

D54/100
14
10
0
Meta Tags9/15
Content9/12
Headings8/8
Technical10/21
E-E-A-T0/7
Images5/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
P
prcm.jpprcm.jp

プリ画像 by GMO サービス終了のお知らせ

「プリ画像」は、2024年6月26日（水）12:00をもちまして、サービスを終了いたしました。ご利用のみなさまへご迷惑をおかけしますこと、深くお詫び申し上げます。今まで「プリ画像」をご利用いただいたみなさまには、心より感謝を申し上げます。ありがとうございました。

Title Length23 chars

Recommended: 50-60 chars (~151px / 580px)

Description Length131 chars

Recommended: 120-160 chars

Issues (0)

    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

    F36/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    0/25
    Citation
    3/25

    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
    def. listsheader/footer
    Text ratio:8%
    Words:315
    Token eff.:Optimal
    Sections/1K:6.3
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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.
    A
    83/100
    12
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    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
    4/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    77/100
    A+
    5 mg
    CO₂e / view
    46.1 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    5 mg
    vs
    Returning (cached)
    3 mg
    Annual (10K/mo)
    564 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    1 mg
    Device
    3 mg
    Resource Breakdown
    Images
    42.7 KB
    HTML
    3.4 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    162d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    GlobalSign nv-sa

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    14.04.2026

    Valid Until

    30.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    prcm.jp

    SHA-256 Fingerprint

    DF:DB:C5:0F:B7:E1:56:1C:A6:44:46:CE:AB:8E:F1:EE:16:47:6D:DF...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    0
    cache-control
    🟡 1 Hours(public, max-age=3600)
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html
    date
    Wed, 20 May 2026 14:27:26 GMT
    etag
    W/"0fa5e9d8047cb26c8fb2d38389d6d156"
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    25

    SPF
    DKIM
    DMARC

    Domain Information

    prcm.jp

    DNSSEC
    Not Enabled

    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
    63/100
    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, initial-scale=1.0
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Arial

    WCAG Partial
    77/100
    Readability
    /30
    26/30

    16px · LH 1.60

    Hierarchy
    /20
    13/20

    1.25x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1.64:1 min contrast

    Performance
    /25
    22/25

    System fonts

    Heading Font

    Arial

    Sans20px

    Body Font

    Arial

    Sans16px

    Contrast Ratio

    1.64:1

    5 issues

    Reading Comfort

    ~51 CPL

    Optimal (45–75)
    20px
    h1
    20px
    h2
    16px
    p
    Minor Second
    Scale

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

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ✅ Optimal line length: ~51 chars/line (ideal 45–75 CPL).

    ⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.6:1).

    ✅ 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.

    Color Palette

    9 unique colors
    Light
    #ffffff
    Background· 90.69999999999999%
    #043250
    Accent· 2.3%
    #f5374e
    Primary· 1.4%
    #e0e9e7
    Secondary· 1.2%
    #90aba8
    Secondary· 1.1%
    #ceadaf
    Secondary· 0.9%
    #668185
    Secondary· 0.9%
    #7c505d
    Secondary· 0.3%

    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

    Sponsored

    Scripts & Styles

    8 Resources

    5
    Scripts
    3
    Styles
    3
    Async
    1
    Defer

    Top Script Sources

    cache.img.gmo.jp(3)gmo-cybersecurity.com(1)seal.atlas.globalsign.com(1)

    Website Identity

    prcm.jp

    Location detected: 🇯🇵 Japanvia tld
    ja

    Sponsored

    Last analyzed: 20 May 2026 at 14:27

    Historical Analysis & Change Tracking