4.5 sec in total
693 ms
3.5 sec
323 ms
Visit j-cast.co.jp now to see the best up-to-date J Cast content for Japan and also check out these interesting facts you probably never knew about j-cast.co.jp
ジェイ・キャストのミッションは、コンテンツの新しい可能性を追求すること。優れた企画・編集力をベースに、メディアの特性を生かしたコンテンツ・サービスをご提供します。
Visit j-cast.co.jpWe analyzed J-cast.co.jp page load time and found that the first response time was 693 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
j-cast.co.jp performance score
name
value
score
weighting
Value4.1 s
21/100
10%
Value29.5 s
0/100
25%
Value9.0 s
14/100
10%
Value120 ms
97/100
30%
Value0.215
58/100
15%
Value5.4 s
72/100
10%
693 ms
326 ms
818 ms
490 ms
520 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that 98% of them (63 requests) were addressed to the original J-cast.co.jp, 2% (1 request) were made to J-cast.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain J-cast.co.jp.
Page size can be reduced by 72.4 kB (32%)
227.1 kB
154.7 kB
In fact, the total size of J-cast.co.jp main page is 227.1 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 140.8 kB which makes up the majority of the site volume.
Potential reduce by 22.3 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. This page needs HTML code to be minified as it can gain 4.9 kB, which is 18% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 22.3 kB or 80% of the original size.
Potential reduce by 213 B
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 Cast images are well optimized though.
Potential reduce by 24.1 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 24.1 kB or 85% of the original size.
Potential reduce by 25.8 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-cast.co.jp needs all CSS files to be minified and compressed as it can save up to 25.8 kB or 86% of the original size.
Number of requests can be reduced by 30 (48%)
63
33
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J Cast. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
j-cast.co.jp
693 ms
styles-site.css
326 ms
mt-site.js
818 ms
json.js
490 ms
jinbn_jp_json.js
520 ms
bg-header.jpg
167 ms
header.jpg
496 ms
lang-arrow.gif
168 ms
lang-jp.gif
167 ms
lang-en.gif
331 ms
lang-cn.gif
331 ms
bg-main.gif
330 ms
home.gif
332 ms
topics.gif
333 ms
service.gif
497 ms
elearning.gif
496 ms
mediaservice.gif
497 ms
web.gif
497 ms
products.gif
499 ms
corp.gif
657 ms
bg-sub.gif
657 ms
arrow-main.gif
658 ms
arrow-sub.gif
659 ms
title-case.gif
660 ms
image-elearning.jpg
661 ms
title-elearning.gif
819 ms
el_case00.gif
1144 ms
linkarrow1.gif
819 ms
image-mediaservice.jpg
983 ms
title-mediaservice.gif
824 ms
mb_case00.jpg
1156 ms
image-web.jpg
982 ms
title-web.gif
981 ms
w_case00.jpg
1522 ms
title-topics.gif
1147 ms
label-notice.gif
1146 ms
label-pressrelease.gif
1145 ms
title-feeds.gif
1305 ms
icon-rss.gif
1308 ms
icon-atom.gif
1309 ms
si-com-title.gif
1232 ms
si-com-disc.gif
1162 ms
si-sep1.gif
1310 ms
si-site-tbm.gif
1314 ms
si-site-town.gif
1152 ms
si-prod-title.gif
1152 ms
si-prod-mushinoshirase.gif
1164 ms
si-prod-tachiyomi.gif
1310 ms
si-prod-allu.gif
1311 ms
si-prod-areatargeting.gif
1150 ms
si-satell-title.gif
1148 ms
si-satell-morishita.jpg
1165 ms
si-satell-harada.jpg
1197 ms
si-satell-japanese.jpg
1305 ms
footer-bg.gif
1307 ms
footer-toTop.gif
1150 ms
footer-title-contact.gif
1150 ms
footer-map.gif
1165 ms
privacy3.gif
1200 ms
footer-title-sitemap.gif
1304 ms
selector-main-left.gif
164 ms
selector-main-right.gif
165 ms
selector-sub-left.gif
166 ms
selector-sub-right.gif
166 ms
j-cast.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 input fields do not have accessible names
ARIA toggle fields do not have accessible names
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
Image elements do not have [alt] attributes
Links do not have a discernible name
j-cast.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
j-cast.co.jp SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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-cast.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-cast.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-cast.co.jp
Open Graph description is not detected on the main page of J Cast. 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: