Tools & Wizards About Us
amazon.co.jp screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    67% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

amazon.co.jp

Amazon | 本, ファッション, 家電から食品まで | アマゾン

Page Load Speed

2.2 sec in total

First Response

197 ms

Resources Loaded

1.7 sec

Page Rendered

339 ms

amazon.co.jp screenshot

About Website

Click here to check amazing Amazon content for Japan. Otherwise, check out these important facts you probably never knew about amazon.co.jp

Amazon.co.jp 公式サイト。アマゾンで本, 日用品, ファッション, 食品, ベビー用品, カー用品ほか一億種の商品をいつでもお安く。通常配送無料(一部を除く)

Visit amazon.co.jp

Key Findings

We analyzed Amazon.co.jp page load time and found that the first response time was 197 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

amazon.co.jp performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

47/100

25%

SI (Speed Index)

Value8.5 s

18/100

10%

TBT (Total Blocking Time)

Value480 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.116

85/100

15%

TTI (Time to Interactive)

Value11.7 s

17/100

10%

Network Requests Diagram

amazon.co.jp

197 ms

www.amazon.co.jp

1013 ms

61uoydiTrtL._RC%7C01h78L-cgLL.css,21e1xEhXt1L.css_.css

52 ms

AmazonUI-d79a3dc623694428712bee1706fdbec9dde39c1d._V2_.css

36 ms

AmazonGatewayHerotatorJS-3ab0c90e530e4d1fbf2f125cc4924b9fea64a0c2._V2_.css

5 ms

Our browser made a total of 219 requests to load all elements on the main page. We found that 2% of them (4 requests) were addressed to the original Amazon.co.jp, 67% (147 requests) were made to Ecx.images-amazon.com and 19% (41 requests) were made to G-ec2.images-amazon.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Amazon.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 4.3 MB (28%)

Content Size

15.4 MB

After Optimization

11.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Amazon.co.jp main page is 15.4 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. 85% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 9.8 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 543.2 kB

  • Original 655.5 kB
  • After minification 607.4 kB
  • After compression 112.2 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 543.2 kB or 83% of the original size.

Image Optimization

-1%

Potential reduce by 87.6 kB

  • Original 9.8 MB
  • After minification 9.8 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. Amazon images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 2.2 MB

  • Original 3.1 MB
  • After minification 3.0 MB
  • After compression 862.6 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 2.2 MB or 72% of the original size.

CSS Optimization

-81%

Potential reduce by 1.4 MB

  • Original 1.8 MB
  • After minification 1.7 MB
  • After compression 338.8 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. Amazon.co.jp needs all CSS files to be minified and compressed as it can save up to 1.4 MB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (10%)

Requests Now

217

After Optimization

196

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 217 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Amazon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

amazon.co.jp

amazon.co.jp

197 ms

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1013 ms

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52 ms

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36 ms

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5 ms

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6 ms

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8 ms

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171 ms

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Accessibility Review

amazon.co.jp accessibility score

94

Accessibility Issues

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

amazon.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

amazon.co.jp SEO score

91

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Amazon.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 Amazon.co.jp main page’s claimed encoding is shift_jis. 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

amazon.co.jp

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