Tools & Wizards About Us
des.co.jp screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

des.co.jp

Denka デンカエラストリューション株式会社 | コンパウンド、熱膨張性ゴム、水膨張ゴム、粘着テープ、ストレーナー

Page Load Speed

8.1 sec in total

First Response

536 ms

Resources Loaded

7.3 sec

Page Rendered

202 ms

des.co.jp screenshot

About Website

Welcome to des.co.jp homepage info - get ready to check Des best content right away, or after learning these important things about des.co.jp

コンパウンド、熱膨張性ゴム、水膨張ゴム、粘着テープ、ストレーナー、各種工業用ゴム製品の製造・加工・販売しているDenka デンカエラストリューション株式会社のウェブサイト。所在地は群馬県高崎市。

Visit des.co.jp

Key Findings

We analyzed Des.co.jp page load time and found that the first response time was 536 ms and then it took 7.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

des.co.jp performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value14.2 s

0/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value150 ms

94/100

30%

CLS (Cumulative Layout Shift)

Value0.492

17/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

des.co.jp

536 ms

des.co.jp

699 ms

www.des.co.jp

2431 ms

js

62 ms

crk.css

179 ms

Our browser made a total of 91 requests to load all elements on the main page. We found that 96% of them (87 requests) were addressed to the original Des.co.jp, 2% (2 requests) were made to Cdnjs.cloudflare.com and 1% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Des.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 116.5 kB (4%)

Content Size

2.6 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Des.co.jp main page is 2.6 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. 50% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 17.8 kB

  • Original 22.4 kB
  • After minification 21.4 kB
  • After compression 4.6 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 17.8 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 30.9 kB

  • Original 2.5 MB
  • After minification 2.4 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. Des images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 63.0 kB

  • Original 106.6 kB
  • After minification 106.6 kB
  • After compression 43.7 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 63.0 kB or 59% of the original size.

CSS Optimization

-35%

Potential reduce by 4.8 kB

  • Original 13.8 kB
  • After minification 13.5 kB
  • After compression 9.0 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. Des.co.jp needs all CSS files to be minified and compressed as it can save up to 4.8 kB or 35% of the original size.

Requests Breakdown

Number of requests can be reduced by 27 (31%)

Requests Now

88

After Optimization

61

  • Images
  • JavaScript
  • CSS

The browser has sent 88 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Des. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

des.co.jp

des.co.jp

536 ms

des.co.jp

des.co.jp

699 ms

www.des.co.jp

www.des.co.jp

2431 ms

js

js

62 ms

crk.css

crk.css

179 ms

top.css

top.css

352 ms

drawer.min.css

drawer.min.css

515 ms

sp.css

sp.css

518 ms

rollover.js

rollover.js

518 ms

pagetop.js

pagetop.js

527 ms

jquery.min.js

jquery.min.js

27 ms

plugins.js

plugins.js

530 ms

top.js

top.js

545 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

684 ms

jquery.bxslider.css

jquery.bxslider.css

688 ms

drawer.min.js

drawer.min.js

688 ms

iscroll.js

iscroll.js

31 ms

bootstrap.min.js

bootstrap.min.js

41 ms

base.css

base.css

524 ms

common.css

common.css

530 ms

style.css

style.css

551 ms

en.gif

en.gif

175 ms

logo_denka.gif

logo_denka.gif

175 ms

btnProducts.gif

btnProducts.gif

172 ms

btnSystem.gif

btnSystem.gif

176 ms

btnFaq.gif

btnFaq.gif

173 ms

btnCompany.gif

btnCompany.gif

182 ms

btnNews.gif

btnNews.gif

344 ms

btnContact.gif

btnContact.gif

344 ms

main01.jpg

main01.jpg

1032 ms

main02.jpg

main02.jpg

1039 ms

main03.jpg

main03.jpg

1055 ms

main04.jpg

main04.jpg

905 ms

thumb_bg.png

thumb_bg.png

514 ms

main_btn_bg.jpg

main_btn_bg.jpg

687 ms

btn_compound.png

btn_compound.png

854 ms

btn_wpm.png

btn_wpm.png

860 ms

btn_refractory.png

btn_refractory.png

1027 ms

btn_pressmolding.png

btn_pressmolding.png

1033 ms

main_products.gif

main_products.gif

1086 ms

main_btn_compound.jpg

main_btn_compound.jpg

1198 ms

main_btn_wpm.jpg

main_btn_wpm.jpg

1202 ms

main_btn_refractory.jpg

main_btn_refractory.jpg

1205 ms

main_btn_pressmolding.jpg

main_btn_pressmolding.jpg

1210 ms

main_btn_sponge.jpg

main_btn_sponge.jpg

1230 ms

main_btn_gum.jpg

main_btn_gum.jpg

1269 ms

main_btn_other.jpg

main_btn_other.jpg

1371 ms

sp_main01.jpg

sp_main01.jpg

1546 ms

sp_main02.jpg

sp_main02.jpg

1888 ms

sp_main03.jpg

sp_main03.jpg

1388 ms

sp_main04.jpg

sp_main04.jpg

1409 ms

title_news.gif

title_news.gif

1450 ms

news_icon.gif

news_icon.gif

1541 ms

title_mainbusiness.gif

title_mainbusiness.gif

1562 ms

contact_bg.jpg

contact_bg.jpg

1587 ms

production_btn.jpg

production_btn.jpg

1633 ms

recruit_btn.jpg

recruit_btn.jpg

1664 ms

faq_btn.jpg

faq_btn.jpg

1548 ms

contact_btn.jpg

contact_btn.jpg

1566 ms

foot_contact_bg.jpg

foot_contact_bg.jpg

1595 ms

foot_contact_btn.jpg

foot_contact_btn.jpg

1644 ms

pagetop.gif

pagetop.gif

1712 ms

btn_compound_on.png

btn_compound_on.png

1713 ms

btn_wpm_on.png

btn_wpm_on.png

1569 ms

btn_refractory_on.png

btn_refractory_on.png

1602 ms

btn_pressmolding_on.png

btn_pressmolding_on.png

1487 ms

foot_bg.jpg

foot_bg.jpg

1371 ms

foot_icon.png

foot_icon.png

1209 ms

print.css

print.css

175 ms

btnProducts_o.gif

btnProducts_o.gif

175 ms

btnSystem_o.gif

btnSystem_o.gif

174 ms

btnFaq_o.gif

btnFaq_o.gif

173 ms

btnCompany_o.gif

btnCompany_o.gif

177 ms

btnNews_o.gif

btnNews_o.gif

172 ms

btnContact_o.gif

btnContact_o.gif

182 ms

btn_compound_o.png

btn_compound_o.png

345 ms

btn_wpm_o.png

btn_wpm_o.png

346 ms

btn_refractory_o.png

btn_refractory_o.png

346 ms

btn_pressmolding_o.png

btn_pressmolding_o.png

354 ms

main_btn_compound_o.jpg

main_btn_compound_o.jpg

353 ms

main_btn_wpm_o.jpg

main_btn_wpm_o.jpg

364 ms

main_btn_refractory_o.jpg

main_btn_refractory_o.jpg

515 ms

main_btn_pressmolding_o.jpg

main_btn_pressmolding_o.jpg

518 ms

main_btn_sponge_o.jpg

main_btn_sponge_o.jpg

519 ms

main_btn_gum_o.jpg

main_btn_gum_o.jpg

528 ms

main_btn_other_o.jpg

main_btn_other_o.jpg

527 ms

production_btn_o.jpg

production_btn_o.jpg

546 ms

recruit_btn_o.jpg

recruit_btn_o.jpg

687 ms

faq_btn_o.jpg

faq_btn_o.jpg

690 ms

contact_btn_o.jpg

contact_btn_o.jpg

690 ms

foot_contact_btn_o.jpg

foot_contact_btn_o.jpg

700 ms

Accessibility Review

des.co.jp accessibility score

87

Accessibility Issues

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

des.co.jp best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

des.co.jp SEO score

79

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Des.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 Des.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

des.co.jp

Open Graph description is not detected on the main page of Des. 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: