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coscom.co.jp screenshot

Report Summary

  • 94

    Performance

    Renders faster than
    93% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

coscom.co.jp

Learn Japanese on the Web

Page Load Speed

4.2 sec in total

First Response

523 ms

Resources Loaded

3.5 sec

Page Rendered

140 ms

coscom.co.jp screenshot

About Website

Click here to check amazing Coscom content for Australia. Otherwise, check out these important facts you probably never knew about coscom.co.jp

Learn Japanese Online - You can learn Japanese Conversation, Kanji, Hiragana Katakana and Phrases Online

Visit coscom.co.jp

Key Findings

We analyzed Coscom.co.jp page load time and found that the first response time was 523 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

coscom.co.jp performance score

94

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value2.2 s

95/100

25%

SI (Speed Index)

Value4.5 s

72/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.067

96/100

15%

TTI (Time to Interactive)

Value2.0 s

99/100

10%

Network Requests Diagram

coscom.co.jp

523 ms

coscom.co.jp

717 ms

www.coscom.co.jp

889 ms

topjss_indextop202401.css

172 ms

logo7webtoppage.png

341 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that all of those requests were addressed to Coscom.co.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Coscom.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 57.6 kB (22%)

Content Size

261.5 kB

After Optimization

203.9 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Coscom.co.jp main page is 261.5 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. 25% of websites need less resources to load. Images take 242.6 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 11.7 kB

  • Original 15.4 kB
  • After minification 14.6 kB
  • After compression 3.7 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 11.7 kB or 76% of the original size.

Image Optimization

-18%

Potential reduce by 44.7 kB

  • Original 242.6 kB
  • After minification 197.9 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. Obviously, Coscom needs image optimization as it can save up to 44.7 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-33%

Potential reduce by 1.2 kB

  • Original 3.5 kB
  • After minification 3.5 kB
  • After compression 2.3 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. Coscom.co.jp needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 33% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

28

After Optimization

28

  • Images
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coscom. According to our analytics all requests are already optimized.

Network Requests Diagram

coscom.co.jp

coscom.co.jp

523 ms

coscom.co.jp

coscom.co.jp

717 ms

www.coscom.co.jp

www.coscom.co.jp

889 ms

topjss_indextop202401.css

topjss_indextop202401.css

172 ms

logo7webtoppage.png

logo7webtoppage.png

341 ms

topbtn_eng2.png

topbtn_eng2.png

512 ms

topbtn_jp1.png

topbtn_jp1.png

514 ms

top-learnjp.gif

top-learnjp.gif

513 ms

imagetop20240507_70yy.png

imagetop20240507_70yy.png

514 ms

tenki20240506_3.png

tenki20240506_3.png

683 ms

enpitsu.gif

enpitsu.gif

684 ms

jpfont.gif

jpfont.gif

684 ms

imagetop_20240506.png

imagetop_20240506.png

686 ms

pr501top_ejp123.png

pr501top_ejp123.png

855 ms

pr501top_atonce.png

pr501top_atonce.png

857 ms

pr501top_250vb.png

pr501top_250vb.png

1025 ms

pr501top_2001kanji.png

pr501top_2001kanji.png

858 ms

img_ipad301_250vb_topleft.png

img_ipad301_250vb_topleft.png

987 ms

img_ipad301_atonce_topleft.png

img_ipad301_atonce_topleft.png

990 ms

img_top_book_250vb.png

img_top_book_250vb.png

1027 ms

topimage01_exword.png

topimage01_exword.png

1028 ms

topimage02_kana.png

topimage02_kana.png

1030 ms

topimage03_niku.png

topimage03_niku.png

1163 ms

topimage04a_hashi.png

topimage04a_hashi.png

1167 ms

topimage04b_yama.png

topimage04b_yama.png

1195 ms

topimage05_kanji.png

topimage05_kanji.png

1198 ms

top_pakipic.gif

top_pakipic.gif

1198 ms

obi_speaker.png

obi_speaker.png

1031 ms

obi_megane.png

obi_megane.png

1166 ms

speaker.gif

speaker.gif

1173 ms

megane25.gif

megane25.gif

1195 ms

Accessibility Review

coscom.co.jp accessibility score

73

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.

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

Best Practices

coscom.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

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

coscom.co.jp SEO score

92

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Coscom.co.jp can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Coscom.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

coscom.co.jp

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