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j-wave.co.jp

J-WAVE 81.3 FM RADIO

Last scanned Jul 26, 2026, 5:47 AM

83

Overall score

Great

Summary

FMラジオ局 J-WAVE 周波数は81.3MHz(東京スカイツリー)、88.3MHz(六本木中継局)。オンエアした楽曲の検索や放送内容、ポッドキャストなど情報満載！radiko(ラジコ)でもラ�… This website uses jQuery hosted on AWS behind CloudFront CDN. SEO is excellent (95/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance good (80/100). Top issue: Meta description longer than 160 characters.

FMラジオ局 J-WAVE 周波数は81.3MHz(東京スカイツリー)、88.3MHz(六本木中継局)。オンエアした楽曲の検索や放送内容、ポッドキャストなど情報満載！radiko(ラジコ)でもラジオがお楽しみいただけます。

United States
Hosted on AWS

Top issues to fix

8 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • TLS certificate expires in 22 days

    Security

    Renew soon or enable auto-renewal to avoid a browser-warning outage.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

+2 more issues — details in the sections below.

95

SEO

1 issue(s) found

80

Performance

1.01 s

65

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

FMラジオ局 J-WAVE 周波数は81.3MHz(東京スカイツリー)、88.3MHz(六本木中継局)。オンエアした楽曲の検索や放送内容、ポッドキャストなど情報満載！radiko(ラジコ)でもラジオがお楽しみいただけます。

FacebookX (Twitter)InstagramYouTube

Meta tags

Title
J-WAVE 81.3 FM RADIO
Description
FMラジオ局 J-WAVE 周波数は81.3MHz(東京スカイツリー)、88.3MHz(六本木中継局)。オンエアした楽曲の検索や放送内容、ポッドキャストなど情報満載！radiko(ラジコ)でもラジオがお楽しみいただけます。
Canonical
https://www.j-wave.co.jp
Language
Charset
utf-8
Viewport
width=device-width,initial-scale=1.0,shrink-to-fit=no
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
J-WAVE 81.3 FM RADIO
og:description
FMラジオ局 J-WAVE 周波数は81.3MHz(東京スカイツリー)、88.3MHz(六本木中継局)。オンエアした楽曲の検索や放送内容、ポッドキャストなど情報満載！radiko(ラジコ)でもラジオがお楽しみいただけます。
og:type
website
og:url
https://www.j-wave.co.jp/

Twitter Card

twitter:card
summary_large_image
twitter:title
J-WAVE 81.3 FM RADIO
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQuery

Hosting & CDN

Hosting provider
AWS
CDN provider
CloudFront
IP address
108.158.61.111
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 108.158.61.111
  • 108.158.61.97
  • 108.158.61.112
  • 108.158.61.122
AAAA
  • 2600:9000:237b:ec00:14:d62f:5280:93a1
  • 2600:9000:237b:3a00:14:d62f:5280:93a1
  • 2600:9000:237b:800:14:d62f:5280:93a1
  • 2600:9000:237b:e600:14:d62f:5280:93a1
  • 2600:9000:237b:7800:14:d62f:5280:93a1
  • 2600:9000:237b:8c00:14:d62f:5280:93a1
  • 2600:9000:237b:3800:14:d62f:5280:93a1
  • 2600:9000:237b:1200:14:d62f:5280:93a1
MX—
TXT—
NS
  • ns-243.awsdns-30.com
  • ns-1787.awsdns-31.co.uk
  • ns-1084.awsdns-07.org
  • ns-1015.awsdns-62.net
CAA—
CNAME
  • d24gxegs71cgui.cloudfront.net
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
GlobalSign nv-sa
Subject
www.j-wave.co.jp
Valid from
Jul 17, 2025
Valid to
Aug 18, 2026
Days until expiry
22
SAN domains
www.j-wave.co.jp, j-wave.co.jp

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 1 · H3 15

Links

37 internal · 7 external · 1 broken

Images

24 total · 0 missing alt

Scripts / Styles

21 scripts · 6 stylesheets

JS / CSS size

393 KB · 333 KB

Page size

63.5 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
60
sitemap.xml
Found
URLs in sitemap
216

SEO issues

  • Meta description longer than 160 characters

Accessibility issues

  • Missing <html lang> attribute

Scan details

Requested URL
https://j-wave.co.jp
Final URL
https://www.j-wave.co.jp/
HTTP status
200
HTTP version
HTTP/2
Response time
1.01 s
HTML size
63.5 KB
Redirect chain
https://j-wave.co.jp → https://www.j-wave.co.jp/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does j-wave.co.jp use?
j-wave.co.jp is built with jQuery.
Is j-wave.co.jp secure (HTTPS)?
Yes. j-wave.co.jp uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Aug 18, 2026.
Who hosts j-wave.co.jp?
j-wave.co.jp is hosted on AWS, behind CloudFront CDN.
What is j-wave.co.jp's SEO score?
j-wave.co.jp scored 95/100 for SEO in the latest analysis (excellent).
What is j-wave.co.jp's overall website score?
j-wave.co.jp has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.