Tools & Wizards About Us
slamjapan.com screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

slamjapan.com

バスケットボールショップ SLAM -バスケットシューズ・ウェア・アクセサリを販売するバスケ専門店-

Page Load Speed

13.6 sec in total

First Response

518 ms

Resources Loaded

12.1 sec

Page Rendered

1 sec

slamjapan.com screenshot

About Website

Welcome to slamjapan.com homepage info - get ready to check SLAM Japan best content for Japan right away, or after learning these important things about slamjapan.com

バスケットボールの専門店！シューズ・ウェアはもちろんボール・サポーターなどアクセサリも充実。バスケットボール用品ならなんでも揃う バスケットボールショップSLAM スラム のオンラインサイトです。AND1、K1Xの品揃えは日本一!!人気の海外ブランドCROSSOVER CULTUREやDeuce、Brandblackを始め、NIKE、Jordan、UNDER ARMOUR、AKTR、ballaho...

Visit slamjapan.com

Key Findings

We analyzed Slamjapan.com page load time and found that the first response time was 518 ms and then it took 13.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

slamjapan.com performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.6 s

0/100

25%

SI (Speed Index)

Value14.5 s

1/100

10%

TBT (Total Blocking Time)

Value220 ms

87/100

30%

CLS (Cumulative Layout Shift)

Value0.389

26/100

15%

TTI (Time to Interactive)

Value10.6 s

23/100

10%

Network Requests Diagram

slamjapan.com

518 ms

slamjapan.com

686 ms

www.slamjapan.com

1058 ms

siteindex.css

354 ms

search_list.js

515 ms

Our browser made a total of 313 requests to load all elements on the main page. We found that 96% of them (299 requests) were addressed to the original Slamjapan.com, 1% (4 requests) were made to Seal.alphassl.com and 1% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Slamjapan.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 287.6 kB (11%)

Content Size

2.6 MB

After Optimization

2.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Slamjapan.com 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. 70% of websites need less resources to load. Images take 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-94%

Potential reduce by 245.9 kB

  • Original 262.8 kB
  • After minification 173.6 kB
  • After compression 17.0 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. This page needs HTML code to be minified as it can gain 89.2 kB, which is 34% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 245.9 kB or 94% of the original size.

Image Optimization

-0%

Potential reduce by 1.2 kB

  • Original 2.3 MB
  • After minification 2.3 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. SLAM Japan images are well optimized though.

JavaScript Optimization

-46%

Potential reduce by 39.2 kB

  • Original 85.8 kB
  • After minification 85.8 kB
  • After compression 46.7 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 39.2 kB or 46% of the original size.

CSS Optimization

-24%

Potential reduce by 1.3 kB

  • Original 5.3 kB
  • After minification 5.1 kB
  • After compression 4.0 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. Slamjapan.com needs all CSS files to be minified and compressed as it can save up to 1.3 kB or 24% of the original size.

Requests Breakdown

Number of requests can be reduced by 47 (15%)

Requests Now

308

After Optimization

261

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 308 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SLAM Japan. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

slamjapan.com

slamjapan.com

518 ms

slamjapan.com

slamjapan.com

686 ms

www.slamjapan.com

www.slamjapan.com

1058 ms

siteindex.css

siteindex.css

354 ms

search_list.js

search_list.js

515 ms

jquery_tooltip01.js

jquery_tooltip01.js

696 ms

main.js

main.js

522 ms

jquery.jcarousel.min.js

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526 ms

skin.css

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ui.core.js

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57 ms

base.css

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54 ms

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m_mness.png

1193 ms

m_wilson.png

m_wilson.png

1070 ms

m_q4.png

m_q4.png

1065 ms

m_tachikara.png

m_tachikara.png

1063 ms

m_ua.png

m_ua.png

1091 ms

m_adidas.png

m_adidas.png

1077 ms

m_puma.png

m_puma.png

1193 ms

m_and1.png

m_and1.png

1068 ms

m_nba.png

m_nba.png

1065 ms

m_mcdavid.png

m_mcdavid.png

1060 ms

m_aso.png

m_aso.png

1090 ms

m_bauerfind.png

m_bauerfind.png

1075 ms

m_slam.png

m_slam.png

1189 ms

m_bga.png

m_bga.png

1072 ms

m_original.png

m_original.png

1066 ms

sidemenu_background.jpg

sidemenu_background.jpg

1063 ms

tel_order20230614.jpg

tel_order20230614.jpg

1070 ms

naha_shop20230614.jpg

naha_shop20230614.jpg

1068 ms

acce_map.jpg

acce_map.jpg

1051 ms

footer_bg.jpg

footer_bg.jpg

1063 ms

tab.png

tab.png

1065 ms

404error.php

404error.php

179 ms

Accessibility Review

slamjapan.com accessibility score

41

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.

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

Form elements do not have associated labels

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

slamjapan.com 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

slamjapan.com SEO score

75

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

High

robots.txt is not valid

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

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Slamjapan.com 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 Slamjapan.com 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

slamjapan.com

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