Tools & Wizards About Us
sei.co.jp screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

sei.co.jp

住友電工 | Connect with Innovation

Page Load Speed

21.2 sec in total

First Response

3.2 sec

Resources Loaded

17.7 sec

Page Rendered

292 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、自動車、情報通信、エレクトロニクス、電線・機材・エネルギー、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 3.2 sec and then it took 18 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

sei.co.jp performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value14.8 s

0/100

25%

SI (Speed Index)

Value11.1 s

6/100

10%

TBT (Total Blocking Time)

Value1,680 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.176

68/100

15%

TTI (Time to Interactive)

Value14.0 s

10/100

10%

Network Requests Diagram

sei.co.jp

3217 ms

elements.css

2054 ms

layouts.css

2658 ms

slick.css

2062 ms

toppage.css

2241 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 Sei.co.jp, 2% (1 request) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (14 sec) belongs to the original domain Sei.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 202.8 kB (15%)

Content Size

1.3 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sei.co.jp main page is 1.3 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. 15% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 25.2 kB

  • Original 31.3 kB
  • After minification 22.9 kB
  • After compression 6.0 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 8.4 kB, which is 27% 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 25.2 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 67.8 kB

  • Original 1.2 MB
  • After minification 1.1 MB

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

-78%

Potential reduce by 57.9 kB

  • Original 74.6 kB
  • After minification 64.6 kB
  • After compression 16.8 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 57.9 kB or 78% of the original size.

CSS Optimization

-83%

Potential reduce by 51.9 kB

  • Original 62.3 kB
  • After minification 50.1 kB
  • After compression 10.4 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 needs all CSS files to be minified and compressed as it can save up to 51.9 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (49%)

Requests Now

63

After Optimization

32

  • Images
  • JavaScript
  • CSS

The browser has sent 63 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 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sei.co.jp

sei.co.jp

3217 ms

elements.css

elements.css

2054 ms

layouts.css

layouts.css

2658 ms

slick.css

slick.css

2062 ms

toppage.css

toppage.css

2241 ms

import.js

import.js

2058 ms

slick.min.js

slick.min.js

2611 ms

toppage.js

toppage.js

2250 ms

jquery-1.7.2.min.js

jquery-1.7.2.min.js

6 ms

jquery.cookie.js

jquery.cookie.js

194 ms

lightbox.js

lightbox.js

197 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

359 ms

commons.js

commons.js

389 ms

bg_header_01.gif

bg_header_01.gif

198 ms

corp-logo.gif

corp-logo.gif

195 ms

btn_contact.png

btn_contact.png

185 ms

btn_lang_ja.png

btn_lang_ja.png

193 ms

btn_lang_en.png

btn_lang_en.png

191 ms

btn_lang_cn.png

btn_lang_cn.png

190 ms

text-size.gif

text-size.gif

367 ms

btn_textsize_s.png

btn_textsize_s.png

374 ms

btn_textsize_m.png

btn_textsize_m.png

374 ms

btn_textsize_l.png

btn_textsize_l.png

382 ms

btn_search.png

btn_search.png

374 ms

gnav-bg.png

gnav-bg.png

386 ms

gnav-company.gif

gnav-company.gif

549 ms

gnav-products.gif

gnav-products.gif

570 ms

gnav-technology.gif

gnav-technology.gif

572 ms

gnav-ir.gif

gnav-ir.gif

563 ms

gnav-csr.gif

gnav-csr.gif

570 ms

gnav-recruit.gif

gnav-recruit.gif

594 ms

slide_bg_01_01.jpg

slide_bg_01_01.jpg

8397 ms

slide_bg_01_02.png

slide_bg_01_02.png

1093 ms

slide_bg_02_01.jpg

slide_bg_02_01.jpg

13970 ms

slide_bg_03_01.jpg

slide_bg_03_01.jpg

13372 ms

slide_bg_03_02.png

slide_bg_03_02.png

7509 ms

topics_bg.png

topics_bg.png

795 ms

bnr_topics_01.jpg

bnr_topics_01.jpg

1074 ms

icn_link1.gif

icn_link1.gif

1278 ms

bnr_topics_02.jpg

bnr_topics_02.jpg

8160 ms

bnr_topics_03.jpg

bnr_topics_03.jpg

10220 ms

ttl_press.gif

ttl_press.gif

7867 ms

icn_rss.gif

icn_rss.gif

8052 ms

icn_link2.gif

icn_link2.gif

8250 ms

icn_other.gif

icn_other.gif

8346 ms

icn_pdf.gif

icn_pdf.gif

8432 ms

icn_personnel.gif

icn_personnel.gif

8537 ms

icn_products.gif

icn_products.gif

9436 ms

icn_ir.gif

icn_ir.gif

8610 ms

ttl_news.gif

ttl_news.gif

9262 ms

bnr_01.jpg

bnr_01.jpg

9621 ms

bnr_02.jpg

bnr_02.jpg

9883 ms

bnr_04.jpg

bnr_04.jpg

9716 ms

bnr_05.jpg

bnr_05.jpg

10030 ms

bnr_03.jpg

bnr_03.jpg

10475 ms

icn_gototop.gif

icn_gototop.gif

9897 ms

bg_footer_01.gif

bg_footer_01.gif

10103 ms

icn_blank.gif

icn_blank.gif

10098 ms

loading.gif

loading.gif

10106 ms

close.png

close.png

10298 ms

btn_prev.png

btn_prev.png

10289 ms

btn_next.png

btn_next.png

10138 ms

btn_dots.png

btn_dots.png

10291 ms

ajax-loader.gif

ajax-loader.gif

10288 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

92

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

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: