Tools & Wizards About Us
corejapan.net screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

corejapan.net

【2025年最新】プロテインが激安のコアジャパン

Page Load Speed

7 sec in total

First Response

1.2 sec

Resources Loaded

4.9 sec

Page Rendered

815 ms

corejapan.net screenshot

About Website

Welcome to corejapan.net homepage info - get ready to check Corejapan best content for Japan right away, or after learning these important things about corejapan.net

【プロテイン激安】高タンパク質のホエイ、ソイ、カゼインプロテインを国内最安値レベルでご提供！初心者から上級者まで、プロテイン選びに迷ったら「おすすめ」商品もチェック。あなたのフィットネスライフを強力サポート！

Visit corejapan.net

Key Findings

We analyzed Corejapan.net page load time and found that the first response time was 1.2 sec and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

corejapan.net performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

11/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

3/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value760 ms

39/100

30%

CLS (Cumulative Layout Shift)

Value0.724

6/100

15%

TTI (Time to Interactive)

Value9.0 s

34/100

10%

Network Requests Diagram

www.corejapan.net

1245 ms

cross-border-cart.css

342 ms

index.css

253 ms

top.css

544 ms

jquery.min.js

32 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 11% of them (6 requests) were addressed to the original Corejapan.net, 63% (35 requests) were made to Img09.shop-pro.jp and 9% (5 requests) were made to Img.shop-pro.jp. The less responsive or slowest element that took the longest time to load (2.8 sec) relates to the external source Img09.shop-pro.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 191.9 kB (19%)

Content Size

1.0 MB

After Optimization

825.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Corejapan.net main page is 1.0 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. 30% of websites need less resources to load. Images take 788.1 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 58.6 kB

  • Original 74.5 kB
  • After minification 71.6 kB
  • After compression 15.9 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 58.6 kB or 79% of the original size.

Image Optimization

-5%

Potential reduce by 40.7 kB

  • Original 788.1 kB
  • After minification 747.4 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. Corejapan images are well optimized though.

JavaScript Optimization

-54%

Potential reduce by 68.4 kB

  • Original 125.5 kB
  • After minification 121.9 kB
  • After compression 57.2 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 68.4 kB or 54% of the original size.

CSS Optimization

-84%

Potential reduce by 24.2 kB

  • Original 28.9 kB
  • After minification 16.5 kB
  • After compression 4.6 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. Corejapan.net needs all CSS files to be minified and compressed as it can save up to 24.2 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (43%)

Requests Now

54

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Corejapan. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.corejapan.net

www.corejapan.net

1245 ms

cross-border-cart.css

cross-border-cart.css

342 ms

index.css

index.css

253 ms

top.css

top.css

544 ms

jquery.min.js

jquery.min.js

32 ms

main.css

main.css

507 ms

coin-slider.js

coin-slider.js

218 ms

widget.js

widget.js

63 ms

cart.js

cart.js

344 ms

product_stock.js

product_stock.js

343 ms

li.php

li.php

328 ms

li.php

li.php

335 ms

search_button.gif

search_button.gif

88 ms

ja_follow_me-c.png

ja_follow_me-c.png

167 ms

icons29.gif

icons29.gif

173 ms

icons15.gif

icons15.gif

320 ms

cart_button.gif

cart_button.gif

86 ms

sp.gif

sp.gif

87 ms

rss.gif

rss.gif

87 ms

atom.gif

atom.gif

87 ms

bg.gif

bg.gif

250 ms

PA01041461.gif

PA01041461.gif

88 ms

bnr_kingmass.jpg

bnr_kingmass.jpg

850 ms

cp_point5.png

cp_point5.png

704 ms

bnr_main_big.png

bnr_main_big.png

1106 ms

97350378_th.jpg

97350378_th.jpg

393 ms

92582805_th.jpg

92582805_th.jpg

356 ms

91960484_th.jpg

91960484_th.jpg

509 ms

90868037_th.png

90868037_th.png

733 ms

94559524_th.jpg

94559524_th.jpg

639 ms

bnr_champ.png

bnr_champ.png

1594 ms

bunner201203_big.png

bunner201203_big.png

1716 ms

kodama.jpg

kodama.jpg

1131 ms

cp_point7.gif

cp_point7.gif

1063 ms

7020034.jpg

7020034.jpg

1146 ms

8657475.jpg

8657475.jpg

1518 ms

6116616.jpg

6116616.jpg

1459 ms

hajimete.png

hajimete.png

1383 ms

qrcode.jpg

qrcode.jpg

1184 ms

bunner01.png

bunner01.png

1428 ms

pay.gif

pay.gif

1636 ms

7020034_th.jpg

7020034_th.jpg

1469 ms

25639712_th.jpg

25639712_th.jpg

1521 ms

18727166_th.jpg

18727166_th.jpg

1511 ms

97389250_th.png

97389250_th.png

1563 ms

75419151_th.jpg

75419151_th.jpg

1585 ms

analytics.js

analytics.js

12 ms

bodybg2.png

bodybg2.png

2792 ms

header_bg2.png

header_bg2.png

1794 ms

h3_bg.png

h3_bg.png

1833 ms

qaqq.gif

qaqq.gif

1855 ms

qaq.gif

qaq.gif

1928 ms

qaa.gif

qaa.gif

2027 ms

collect

collect

27 ms

arrow01.png

arrow01.png

1952 ms

bld0001_producs.jpg

bld0001_producs.jpg

218 ms

Accessibility Review

corejapan.net accessibility score

48

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.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

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

corejapan.net best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

corejapan.net SEO score

82

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    EUC-JP

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

corejapan.net

Open Graph data is detected on the main page of Corejapan. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: