5.5 sec in total
513 ms
4.3 sec
640 ms
Click here to check amazing Sei content for Japan. Otherwise, check out these important facts you probably never knew about sei.co.jp
独創的な研究開発を通じ、環境エネルギー、情報通信、自動車、エレクトロニクス、産業素材の5つの分野で、幅広く事業を展開し、社会インフラの発展に貢献するグローバルカンパニー。
Visit sei.co.jpWe analyzed Sei.co.jp page load time and found that the first response time was 513 ms and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
sei.co.jp performance score
name
value
score
weighting
Value6.6 s
2/100
10%
Value8.0 s
3/100
25%
Value7.6 s
25/100
10%
Value630 ms
47/100
30%
Value0.308
38/100
15%
Value8.0 s
42/100
10%
513 ms
703 ms
1492 ms
6 ms
19 ms
Our browser made a total of 51 requests to load all elements on the main page. We found that 4% of them (2 requests) were addressed to the original Sei.co.jp, 88% (45 requests) were made to Sumitomoelectric.com and 6% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (1.6 sec) relates to the external source Sumitomoelectric.com.
Page size can be reduced by 226.0 kB (19%)
1.2 MB
988.1 kB
In fact, the total size of Sei.co.jp main page is 1.2 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. 40% of websites need less resources to load. Images take 783.5 kB which makes up the majority of the site volume.
Potential reduce by 182.0 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 26.3 kB, which is 13% 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 182.0 kB or 90% of the original size.
Potential reduce by 43.8 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. Sei images are well optimized though.
Potential reduce by 125 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 51 B
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. Sei.co.jp has all CSS files already compressed.
Number of requests can be reduced by 12 (29%)
42
30
The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sei. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.
sei.co.jp
513 ms
sei.co.jp
703 ms
1492 ms
google_tag.script.js
6 ms
css_dhfBo2EonOMmkxevrfydxQkFILT8LvqLD6GpS5OiBg8.css
19 ms
css_9HUaYwEnstkFSqVw-T8Hrs6LQO5vCJW2-C6fMPIPWDo.css
30 ms
typesquare.js
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brand_mark_j.svg
86 ms
Redox.jpg
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Infocommunications.jpg
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main_nav%20-%20industries%20-%20image%201.jpg
90 ms
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90 ms
Industrial%20materials.jpg
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globe.svg
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search.svg
92 ms
close.svg
99 ms
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mid25.jpg
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top_articke.jpg_0.jpg
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916 ms
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top_highlights_id_vol22.jpg
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sei-arrow.svg
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download-blue.svg
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right-blue.svg
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logo_id.jpg
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open-in-new-blue.svg
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publication2.jpg
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chairman.jpg
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456 ms
other.jpg
458 ms
gotop.png
459 ms
footer-bg.jpg
477 ms
sumitomo%20electric%20footer%20logo_0.svg
493 ms
linkedin-white.svg
503 ms
youtube-white.svg
518 ms
GothamSSm-Book_Web.woff
449 ms
GothamSSm-Medium_Web.woff
458 ms
GothamSSm-Light_Web.woff
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page.js
26 ms
GothamSSm-XLight_Web.woff
1026 ms
GothamSSm-Bold_Web.woff
645 ms
GothamSSm-Black_Web.woff
1015 ms
js_ND4AXfg_Nx8lFA7u34EgiPy4rteopEBeVCKkFyT_MAE.js
701 ms
js_-VG2FTof3AhbebHUxP60La3dpzWo7o3pquaa9n3ngjw.js
722 ms
globe-white.svg
727 ms
sm.25.html
15 ms
eso.BRQnzO8v.js
31 ms
sei.co.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.
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
sei.co.jp best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
sei.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 doesn't use legible font sizes
JA
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sei.co.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 Sei.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.
sei.co.jp
Open Graph description is not detected on the main page of Sei. 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: