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irs.co.jp screenshot

Report Summary

  • 5

    Performance

    Renders faster than
    21% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

irs.co.jp

株式会社アイ・アール・エス

Page Load Speed

3.2 sec in total

First Response

570 ms

Resources Loaded

2.5 sec

Page Rendered

133 ms

irs.co.jp screenshot

About Website

Visit irs.co.jp now to see the best up-to-date Irs content for Japan and also check out these interesting facts you probably never knew about irs.co.jp

世界中の競技参加者を対象に、安全で各車輌・カテゴリーに適応する製品を提供致します。取付方法・性能・諸規則に至るまで、経験とノウハウを活かした正確な情報をお伝えすべく心がけております。プロショップ様向けに業販（仕切り価格販売）も行っておりますので、お気軽にお問い合わせ下さい。

Visit irs.co.jp

Key Findings

We analyzed Irs.co.jp page load time and found that the first response time was 570 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

irs.co.jp performance score

5

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value36.3 s

0/100

25%

SI (Speed Index)

Value27.5 s

0/100

10%

TBT (Total Blocking Time)

Value2,720 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.394

26/100

15%

TTI (Time to Interactive)

Value36.8 s

0/100

10%

Network Requests Diagram

irs.co.jp

570 ms

welcome.png

188 ms

jp2.gif

340 ms

hand_lh.gif

344 ms

gengo.gif

372 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Irs.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 Irs.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 11.5 kB (4%)

Content Size

261.9 kB

After Optimization

250.4 kB

  • HTML
  • Images

In fact, the total size of Irs.co.jp main page is 261.9 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. Only 5% of websites need less resources to load. Images take 253.9 kB which makes up the majority of the site volume.

HTML Optimization

-60%

Potential reduce by 4.8 kB

  • Original 8.0 kB
  • After minification 7.5 kB
  • After compression 3.2 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 4.8 kB or 60% of the original size.

Image Optimization

-3%

Potential reduce by 6.7 kB

  • Original 253.9 kB
  • After minification 247.2 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. Irs images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

  • Images

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Irs. According to our analytics all requests are already optimized.

Network Requests Diagram

irs.co.jp

irs.co.jp

570 ms

welcome.png

welcome.png

188 ms

jp2.gif

jp2.gif

340 ms

hand_lh.gif

hand_lh.gif

344 ms

gengo.gif

gengo.gif

372 ms

hand_rh.gif

hand_rh.gif

369 ms

en3.gif

en3.gif

392 ms

top_photo_cusco1.jpg

top_photo_cusco1.jpg

1197 ms

logo_irs_top.png

logo_irs_top.png

524 ms

top_photo_mikeyoung.jpg

top_photo_mikeyoung.jpg

709 ms

Accessibility Review

irs.co.jp accessibility score

69

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

irs.co.jp best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

irs.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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Irs.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Irs.co.jp main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

irs.co.jp

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