Access tennis-japan.co.jp. テニスジャパン本店 |

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value6.2 s

11/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value2,870 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.057

98/100

15%

TTI (Time to Interactive)

Value9.3 s

32/100

10%

tennis-japan.co.jp

566 ms

www.tennis-japan.co.jp

714 ms

GlobalFont.css

168 ms

Our browser made a total of 3 requests to load all elements on the main page. We found that all of those requests were addressed to Tennis-japan.co.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (714 ms) belongs to the original domain Tennis-japan.co.jp.

Content Size

2.4 kB

After Optimization

768 B

In fact, the total size of Tennis-japan.co.jp main page is 2.4 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. CSS take 1.8 kB which makes up the majority of the site volume.

HTML Optimization

-36%

Potential reduce by 213 B

Original 596 B
After minification 596 B
After compression 383 B

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 213 B or 36% of the original size.

CSS Optimization

-78%

Potential reduce by 1.4 kB

Original 1.8 kB
After minification 976 B
After compression 385 B

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. Tennis-japan.co.jp needs all CSS files to be minified and compressed as it can save up to 1.4 kB or 78% of the original size.

Requests Now

After Optimization

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tennis Japan. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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

High

Image elements do not have [alt] attributes

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/).

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

JA
Language Claimed

N/A
Encoding

EUC-JP

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

tennis-japan.co.jp

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