4.5 sec in total
762 ms
3.5 sec
231 ms
Welcome to jsea.jp homepage info - get ready to check Jsea best content for Japan right away, or after learning these important things about jsea.jp
人類の宇宙進出を飛躍的に促進する宇宙エレベーター(以下SE)。 20世紀後半まではSFの範疇と考えられていましたが、最大の課題である素材の材料強度に著しい発展が見られたことで、このまま研究開発が進めば「我々の世代で」実現できるのではないか、という期待が高まってきました。 本協会は、2008年よりSE実現に向けた様々な活動を行っています。
Visit jsea.jpWe analyzed Jsea.jp page load time and found that the first response time was 762 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
jsea.jp performance score
name
value
score
weighting
Value6.4 s
2/100
10%
Value14.4 s
0/100
25%
Value12.6 s
3/100
10%
Value480 ms
59/100
30%
Value0.563
12/100
15%
Value17.2 s
4/100
10%
762 ms
347 ms
5 ms
355 ms
371 ms
Our browser made a total of 49 requests to load all elements on the main page. We found that 86% of them (42 requests) were addressed to the original Jsea.jp, 4% (2 requests) were made to Google-analytics.com and 4% (2 requests) were made to Staticxx.facebook.com. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Jsea.jp.
Page size can be reduced by 57.2 kB (64%)
88.9 kB
31.7 kB
In fact, the total size of Jsea.jp main page is 88.9 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. 35% of websites need less resources to load. CSS take 39.4 kB which makes up the majority of the site volume.
Potential reduce by 23.0 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 5.0 kB, which is 16% 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 23.0 kB or 76% of the original size.
Potential reduce by 756 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. Obviously, Jsea needs image optimization as it can save up to 756 B or 43% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 142 B
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. This website has mostly compressed JavaScripts.
Potential reduce by 33.3 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. Jsea.jp needs all CSS files to be minified and compressed as it can save up to 33.3 kB or 85% of the original size.
Number of requests can be reduced by 19 (40%)
48
29
The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jsea. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
jsea.jp
762 ms
import.css
347 ms
jquery.min.js
5 ms
Divclick.js
355 ms
linkscroll.js
371 ms
reset.css
176 ms
layout.css
187 ms
head_foot_side.css
186 ms
main_common.css
393 ms
main_separate.css
348 ms
free.css
358 ms
ga.js
29 ms
bg.gif
193 ms
sponcer20150916.gif
917 ms
head_bg1.gif
182 ms
head_bg_main.gif
355 ms
logo.gif
227 ms
headimg_01.gif
221 ms
head_bg2.gif
220 ms
menu_00.gif
337 ms
menu_01.gif
351 ms
menu_03.gif
360 ms
menu_02.gif
357 ms
menu_04.gif
384 ms
menu_05.gif
508 ms
bg_box_main_column2b.gif
520 ms
top_news00_tit.gif
533 ms
top_news_mark.gif
534 ms
top_news01_tit.gif
545 ms
top_news02_tit.gif
574 ms
top_news03_tit.gif
680 ms
top_news04_tit.gif
696 ms
sidebana_jsea.gif
900 ms
sidebana_jpsec.gif
1010 ms
sidebana_jsetec.gif
1017 ms
sidebana_senews.gif
2030 ms
sidebana_furespilits.gif
2063 ms
sidebana_advp.gif
1068 ms
bot_pagetop.png
1072 ms
all.js
70 ms
__utm.gif
53 ms
sidemenu_bg.gif
552 ms
ya_side.gif
548 ms
bg_footer1.gif
571 ms
bg_footer2.gif
598 ms
bg_footer3.gif
686 ms
82 ms
xd_arbiter.php
31 ms
xd_arbiter.php
62 ms
jsea.jp accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
jsea.jp best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
jsea.jp SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jsea.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that Jsea.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.
jsea.jp
Open Graph description is not detected on the main page of Jsea. 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: