Tools & Wizards About Us
sei.co.jp screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

sei.co.jp

住友電工 | Connect with Innovation

Page Load Speed

5.5 sec in total

First Response

513 ms

Resources Loaded

4.3 sec

Page Rendered

640 ms

sei.co.jp screenshot

About Website

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.jp

Key Findings

We 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.

Performance Metrics

sei.co.jp performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

3/100

25%

SI (Speed Index)

Value7.6 s

25/100

10%

TBT (Total Blocking Time)

Value630 ms

47/100

30%

CLS (Cumulative Layout Shift)

Value0.308

38/100

15%

TTI (Time to Interactive)

Value8.0 s

42/100

10%

Network Requests Diagram

sei.co.jp

513 ms

sei.co.jp

703 ms

1492 ms

google_tag.script.js

6 ms

css_dhfBo2EonOMmkxevrfydxQkFILT8LvqLD6GpS5OiBg8.css

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 Optimization Overview & Recommendations

Page size can be reduced by 226.0 kB (19%)

Content Size

1.2 MB

After Optimization

988.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

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.

HTML Optimization

-90%

Potential reduce by 182.0 kB

  • Original 203.0 kB
  • After minification 176.7 kB
  • After compression 21.0 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.

Image Optimization

-6%

Potential reduce by 43.8 kB

  • Original 783.5 kB
  • After minification 739.7 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. Sei images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 121 B

  • Original 132.5 kB
  • After minification 132.5 kB
  • After compression 132.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 51 B

  • Original 95.1 kB
  • After minification 95.1 kB
  • After compression 95.1 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. Sei.co.jp has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (29%)

Requests Now

42

After Optimization

30

  • AJAX
  • Images
  • JavaScript
  • CSS

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.

Network Requests Diagram

sei.co.jp

sei.co.jp

513 ms

sei.co.jp

sei.co.jp

703 ms

1492 ms

google_tag.script.js

google_tag.script.js

6 ms

css_dhfBo2EonOMmkxevrfydxQkFILT8LvqLD6GpS5OiBg8.css

css_dhfBo2EonOMmkxevrfydxQkFILT8LvqLD6GpS5OiBg8.css

19 ms

css_9HUaYwEnstkFSqVw-T8Hrs6LQO5vCJW2-C6fMPIPWDo.css

css_9HUaYwEnstkFSqVw-T8Hrs6LQO5vCJW2-C6fMPIPWDo.css

30 ms

typesquare.js

typesquare.js

402 ms

brand_mark_j.svg

brand_mark_j.svg

86 ms

Redox.jpg

Redox.jpg

697 ms

Infocommunications.jpg

Infocommunications.jpg

414 ms

main_nav%20-%20industries%20-%20image%201.jpg

main_nav%20-%20industries%20-%20image%201.jpg

90 ms

%E3%82%A8%E3%83%AC%E3%82%AF%E3%83%88%E3%83%AD%E3%83%8B%E3%82%AF%E3%82%B9%E4%BA%8B%E6%A5%AD.jpg

%E3%82%A8%E3%83%AC%E3%82%AF%E3%83%88%E3%83%AD%E3%83%8B%E3%82%AF%E3%82%B9%E4%BA%8B%E6%A5%AD.jpg

90 ms

Industrial%20materials.jpg

Industrial%20materials.jpg

88 ms

globe.svg

globe.svg

96 ms

search.svg

search.svg

92 ms

close.svg

close.svg

99 ms

search.svg

search.svg

94 ms

mid25.jpg

mid25.jpg

1173 ms

top_articke.jpg_0.jpg

top_articke.jpg_0.jpg

107 ms

202408_top_article.jpg

202408_top_article.jpg

116 ms

%E7%A0%94%E7%A9%B6%E9%96%8B%E7%99%BA%E3%83%93%E3%82%B8%E3%83%A7%E3%83%B3%E5%8B%95%E7%94%BB.jpg

%E7%A0%94%E7%A9%B6%E9%96%8B%E7%99%BA%E3%83%93%E3%82%B8%E3%83%A7%E3%83%B3%E5%8B%95%E7%94%BB.jpg

916 ms

img-7.jpg

img-7.jpg

782 ms

J204-%E8%A1%A8%E7%B4%99_800.jpg

J204-%E8%A1%A8%E7%B4%99_800.jpg

420 ms

top_highlights_id_vol22.jpg

top_highlights_id_vol22.jpg

423 ms

sei-arrow.svg

sei-arrow.svg

425 ms

download-blue.svg

download-blue.svg

426 ms

%E7%A4%BE%E9%95%B7%E3%83%96%E3%83%AD%E3%82%B0.jpg

%E7%A4%BE%E9%95%B7%E3%83%96%E3%83%AD%E3%82%B0.jpg

428 ms

right-blue.svg

right-blue.svg

429 ms

logo_id.jpg

logo_id.jpg

438 ms

open-in-new-blue.svg

open-in-new-blue.svg

440 ms

publication2.jpg

publication2.jpg

451 ms

chairman.jpg

chairman.jpg

454 ms

%E3%82%B9%E3%83%9D%E3%83%BC%E3%83%84%E6%94%AF%E6%8F%B4.jpg

%E3%82%B9%E3%83%9D%E3%83%BC%E3%83%84%E6%94%AF%E6%8F%B4.jpg

456 ms

other.jpg

other.jpg

458 ms

gotop.png

gotop.png

459 ms

footer-bg.jpg

footer-bg.jpg

477 ms

sumitomo%20electric%20footer%20logo_0.svg

sumitomo%20electric%20footer%20logo_0.svg

493 ms

linkedin-white.svg

linkedin-white.svg

503 ms

youtube-white.svg

youtube-white.svg

518 ms

GothamSSm-Book_Web.woff

GothamSSm-Book_Web.woff

449 ms

GothamSSm-Medium_Web.woff

GothamSSm-Medium_Web.woff

458 ms

GothamSSm-Light_Web.woff

GothamSSm-Light_Web.woff

1563 ms

page.js

page.js

26 ms

GothamSSm-XLight_Web.woff

GothamSSm-XLight_Web.woff

1026 ms

GothamSSm-Bold_Web.woff

GothamSSm-Bold_Web.woff

645 ms

GothamSSm-Black_Web.woff

GothamSSm-Black_Web.woff

1015 ms

js_ND4AXfg_Nx8lFA7u34EgiPy4rteopEBeVCKkFyT_MAE.js

js_ND4AXfg_Nx8lFA7u34EgiPy4rteopEBeVCKkFyT_MAE.js

701 ms

js_-VG2FTof3AhbebHUxP60La3dpzWo7o3pquaa9n3ngjw.js

js_-VG2FTof3AhbebHUxP60La3dpzWo7o3pquaa9n3ngjw.js

722 ms

globe-white.svg

globe-white.svg

727 ms

sm.25.html

sm.25.html

15 ms

eso.BRQnzO8v.js

eso.BRQnzO8v.js

31 ms

Accessibility Review

sei.co.jp accessibility score

91

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

sei.co.jp best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

sei.co.jp SEO score

86

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Document doesn't use legible font sizes

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    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.

Social Sharing Optimization

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: