8.3 sec in total
844 ms
7.1 sec
375 ms
Welcome to j-wave.co.jp homepage info - get ready to check J WAVE best content for Japan right away, or after learning these important things about j-wave.co.jp
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。
Visit j-wave.co.jpWe analyzed J-wave.co.jp page load time and found that the first response time was 844 ms and then it took 7.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
j-wave.co.jp performance score
name
value
score
weighting
Value4.0 s
22/100
10%
Value35.6 s
0/100
25%
Value16.3 s
0/100
10%
Value6,230 ms
0/100
30%
Value0
100/100
15%
Value20.6 s
2/100
10%
844 ms
318 ms
330 ms
313 ms
477 ms
Our browser made a total of 276 requests to load all elements on the main page. We found that 59% of them (164 requests) were addressed to the original J-wave.co.jp, 7% (20 requests) were made to Pbs.twimg.com and 3% (7 requests) were made to Aladdin.genieesspv.jp. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain J-wave.co.jp.
Page size can be reduced by 851.6 kB (24%)
3.5 MB
2.7 MB
In fact, the total size of J-wave.co.jp main page is 3.5 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.6 MB which makes up the majority of the site volume.
Potential reduce by 88.8 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 88.8 kB or 81% of the original size.
Potential reduce by 164.7 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. J WAVE images are well optimized though.
Potential reduce by 495.6 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 495.6 kB or 70% of the original size.
Potential reduce by 102.5 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. J-wave.co.jp needs all CSS files to be minified and compressed as it can save up to 102.5 kB or 81% of the original size.
Number of requests can be reduced by 96 (37%)
262
166
The browser has sent 262 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J WAVE. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 34 to 1 for JavaScripts and from 27 to 1 for CSS and as a result speed up the page load time.
j-wave.co.jp
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j-wave.co.jp accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
ARIA IDs are not unique
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
Heading elements are not in a sequentially-descending order
Some elements have a [tabindex] value greater than 0
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
<frame> or <iframe> elements do not have a title
Links do not have a discernible name
j-wave.co.jp best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
j-wave.co.jp SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
JA
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise J-wave.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that J-wave.co.jp main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
j-wave.co.jp
Open Graph description is not detected on the main page of J WAVE. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: