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rbc.co.jp

https://rbc.co.jp· First analyzed 21 May 2026· Updated 21 May 2026
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rbc.co.jp
Desktop screenshot of rbc.co.jp
Mobile screenshot of rbc.co.jp
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

13.33.235.111

Site Location

🇯🇵 Japanvia tld

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Apache

CDN

CloudFront

Nameservers

ns-1664.awsdns-16.co.uk.ns-404.awsdns-50.com.ns-796.awsdns-35.net.ns-1527.awsdns-62.org.

Performance

89

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
2.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
16.1 MB
235 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
RBC_responsiveCustom

Technology Stack

21 Technologies Detected

Advertising

4
Google AdsGoogle AdSenseCriteoOutbrain

Plugins

4
Stripe PaymentsWp To TwitterWp PagenaviEasy Fancybox

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

UI Components

2
Slick CarouselFancybox

Icon Libraries

2
Font AwesomeMaterial Icons

Libraries

1
jQueryv2.2.4

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Payments

1
Square

Web Servers

1
Apache

SEO Analysis

C69/100
21
8
0
Meta Tags5/15
Content10/12
Headings6/8
Technical19/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
R
rbc.co.jprbc.co.jp

トップページ｜RBC 琉球放送

RBC 琉球放送の公式サイトです。沖縄のニュース、テレビおよびラジオの番組案内、イベント情報等をお届けいたします。

Title Length15 chars

Recommended: 50-60 chars (~93px / 580px)

Description Length57 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    109 URLs

    109 sub-sitemaps

    robots.txt

    4 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    11/100
    Poor
    3 12 2

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

    Sponsored

    AI & LLM Readiness

    D43/100
    Bot Access
    20/25
    Machine Read.
    9/25
    Schema Data
    0/25
    Citation
    14/25

    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
    def. lists
    Text ratio:10%
    Words:9,147
    Token eff.:Excessive
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary205w
    Descriptive Headingsavg 1w
    Canonical URL
    Open Graph2/3
    Twitter Card2/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    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.
    D
    59/100
    10
    Passed
    4
    Critical
    4
    Warnings
    Images & Alt Text
    10/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    14/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    7/15
    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
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    4 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.
    36/100
    F
    1.67 g
    CO₂e / view
    16.1 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    1.91 g
    vs
    Returning (cached)
    954 mg
    Annual (10K/mo)
    200.2 kg
    Emission Segments
    Data Center
    82 mg
    Network
    490 mg
    Device
    1.10 g
    Resource Breakdown
    JavaScript
    647.9 KB
    Images
    15.4 MB
    CSS
    48.4 KB
    Fonts
    66.9 KB
    HTML
    24.9 KB
    Other
    5.2 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    8 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    35d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    DigiCert Inc

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    27.05.2025

    Valid Until

    25.06.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    www.rbc.co.jprbc.co.jp

    SHA-256 Fingerprint

    73:C5:46:F7:05:30:45:67:12:D6:D1:1C:62:49:62:90:86:A1:33:BE...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    content-encoding
    📦 Gzip(gzip)
    content-length
    25163
    content-type
    text/html; charset=UTF-8
    date
    Thu, 21 May 2026 13:39:30 GMT
    link
    <https://www.rbc.co.jp/>; rel=shortlink
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (5)

    aspmx.l.google.com
    alt2.aspmx.l.google.com
    alt1.aspmx.l.google.com
    aspmx3.googlemail.com

    +1 more

    Domain Information

    rbc.co.jp

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    Privacy policy page linked
    Legitimate interest basis mentioned

    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.
    B
    71/100
    Mobile Friendly11 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=1300
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans

    WCAG Partial
    62/100
    Readability
    /30
    16/30

    12px · LH 1.33

    Hierarchy
    /20
    13/20

    1.46x ratio

    WCAG
    /25
    15/25

    3.56:1 min contrast

    Performance
    /25
    18/25

    2 fonts · 4 req

    Heading Font

    Open Sans

    Sans18px

    Body Font

    Open Sans

    Sans12px

    Contrast Ratio

    3.56:1

    2 issues

    Reading Comfort

    ~39 CPL

    Narrow lines
    18px
    h1
    24px
    h2
    18px
    h3
    12px
    p
    Minor Second
    Scale

    ❌ 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.

    ⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.6:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

    GGoogle FontsFlesch 66

    Color Palette

    9 unique colors
    5.74:1 AA Dark
    #666666
    Other· 48.800000000000004%
    #ffffff
    Background· 18.4%
    #0a0816
    Primary· 7.1%
    #5c2314
    Accent· 5.8%
    #350b29
    Accent· 4.3%
    #4a555f
    Secondary· 3.2%
    #727f8f
    Secondary· 2.1%

    Business & Marketing Stack

    5 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    Advertising

    1
    Google AdsEnterprise

    Ad platforms and retargeting pixels

    Social Media

    1
    Twitter/X WidgetsFree

    Social widgets and sharing tools

    3

    Categories

    5

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Ad Networks

    Google AdSenseGoogle Ad ManagerMedia.netSovrnPubMaticOpenXIndex ExchangePrebid.js

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    12
    Async
    0
    Defer

    Top Script Sources

    anymind360.com(3)rbc.co.jp(3)securepubads.g.doubleclick.net(3)pagead2.googlesyndication.com(2)googletagmanager.com(2)

    Website Identity

    rbc.co.jp

    ©琉球放送 株式会社 All Rights Reserved.

    Location detected: 🇯🇵 Japanvia tld
    📧 Google Workspaceja

    Sponsored

    Last analyzed: 21 May 2026 at 13:40

    Historical Analysis & Change Tracking

    rbc.co.jp Technology Stack - Built With jQuery, Slick Carousel, Fancybox, Tailwind CSS, Font Awesome | StackOptic | StackOptic