listenradio.jp

https://listenradio.jp· First analyzed 19 May 2026· Updated 19 May 2026

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listenradio.jp

Mobile

Sponsored

Hosting Provider

MTI Ltd.

IP Address

202.219.71.67

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS2510

Organization

MTI Ltd.

Server

Microsoft IIS

Nameservers

ns-1056.awsdns-04.org.ns-1648.awsdns-14.co.uk.ns-464.awsdns-58.com.ns-715.awsdns-25.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.0 s10%

Speed Index

2.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

22.1 MB

204 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

JAMstack

⚡ SSG

Frontend

Framework

Astro

Infrastructure

Hosting

MTI Ltd.

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Advertising

Google Ads Google AdSense

Meta Frameworks

Libraries

CSS Frameworks

Fonts

Tag Managers

Web Servers

Frameworks

SEO Analysis

C63/100

Meta Tags8/15

Content11/12

Headings1/8

Technical19/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

listenradio.jplistenradio.jp

ListenRadio(リスラジ)無料でコミュニティFM局の番組が楽しめる

Title Length37 chars

Recommended: 50-60 chars (~227px / 580px)

Description Length37 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (83/92) — critical for accessibility and SEO

8 issues found

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Crawlability

Sitemap

Type: standard

14 URLs

robots.txt

20 rules

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

D51/100

Bot Access

20/25

Machine Read.

16/25

Schema Data

0/25

Citation

15/25

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

nav

Text ratio:7%

Words:1,390

Token eff.:Optimal

Sections/1K:33.1

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary82w

Descriptive Headingsavg 1.6w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

73/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

10/15

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.

3 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.

16/100

2.80 g

CO₂e / view

22.1 MB

Page Weight

Cleaner Than

New Visitor

3.20 g

Returning (cached)

1.60 g

Annual (10K/mo)

336.5 kg

Emission Segments

Data Center

626 mg

Network

673 mg

Device

1.50 g

Resource Breakdown

JavaScript

752.2 KB

Images

4.1 MB

CSS

142.5 KB

Fonts

30.4 KB

HTML

264.5 KB

Other

16.9 MB

Green Hosting Not Verified

MTI Ltd.

10 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

132d

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/1.1

Valid From

27.08.2025

Valid Until

28.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

listenradio.jp

SHA-256 Fingerprint

73:D6:3C:B7:17:EA:90:19:31:CC:9B:42:D4:32:78:87:56:A5:0C:F4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-length

270586

content-type

text/html; charset=utf-8

date

Tue, 19 May 2026 08:06:33 GMT

server

Microsoft-IIS/7.5

x-aspnet-version

4.0.30319

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

listenradio.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

64/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Noto Sans JP

WCAG Partial

62/100

Readability

/30

14/30

12px · LH 1.42

Hierarchy

/20

12/20

1.17x ratio

WCAG

/25

18/25

3.41:1 min contrast

Performance

/25

18/25

1 font · 1 req

Heading Font

Noto Sans JP

Sans14px

Body Font

Noto Sans JP

Sans12px

Contrast Ratio

3.41:1

9 issues

Reading Comfort

Single Font Family

left aligned

14px

27px

12px

Perfect Fifth

Scale

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

✅ Optimal line spacing: 1.42 ratio (ideal range 1.4–1.6).

✅ Easy to read: Flesch score 74/100 — accessible to general audiences.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 3.4:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

GGoogle Fonts Buy on MyFontsFluid Type (rem)Flesch 74

Color Palette

7 unique colors

3.78:1 AA Large Light

#ffffff

Background· 60.7%

#84828d

Other· 5.3%

#c60017

Primary· 18%

#6c020b

Accent· 5.2%

#b3bcc1

Secondary· 4.7%

#ece6e6

Secondary· 3.3%

#96343e

Secondary· 2.9%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(3)local(3)googletagmanager.com(2)ajax.googleapis.com(1)cdn.jsdelivr.net(1)

Website Identity

listenradio.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 19 May 2026 at 08:07

Historical Analysis & Change Tracking