Report Summary

  • 10

    Performance

    Renders faster than
    31% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    65% of websites

  • 82

    SEO

    Google-friendlier than
    52% of websites

kawai-juku.ac.jp

大学受験の予備校・塾 河合塾

Page Load Speed

12.2 sec in total

First Response

1.6 sec

Resources Loaded

10.5 sec

Page Rendered

186 ms

kawai-juku.ac.jp screenshot

About Website

Click here to check amazing Kawai Juku content for Japan. Otherwise, check out these important facts you probably never knew about kawai-juku.ac.jp

東大・京大・早慶大など難関大や医学部をはじめ数々の大学・高校の合格実績が河合塾の自信です。高卒生や現役生、中高一貫、海外大進学、帰国生、通信制の学生ほか、英語や幼児教育も幅広くサポート。大学受験の予備校・塾、学校法人河合塾の公式サイトです。

Visit kawai-juku.ac.jp

Key Findings

We analyzed Kawai-juku.ac.jp page load time and found that the first response time was 1.6 sec and then it took 10.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

kawai-juku.ac.jp performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value9.1 s

1/100

25%

SI (Speed Index)

Value11.9 s

4/100

10%

TBT (Total Blocking Time)

Value4,130 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.261

47/100

15%

TTI (Time to Interactive)

Value14.8 s

8/100

10%

Network Requests Diagram

kawai-juku.ac.jp

1555 ms

www.kawai-juku.ac.jp

1491 ms

reset.css

545 ms

group.css

375 ms

base.css

717 ms

Our browser made a total of 204 requests to load all elements on the main page. We found that 89% of them (181 requests) were addressed to the original Kawai-juku.ac.jp, 3% (6 requests) were made to Api.flipdesk.jp and 1% (3 requests) were made to Kjp.oo.kawai-juku.ac.jp. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Kawai-juku.ac.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (45%)

Content Size

4.6 MB

After Optimization

2.5 MB

In fact, the total size of Kawai-juku.ac.jp main page is 4.6 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. 50% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 83.6 kB

  • Original 99.5 kB
  • After minification 91.9 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 83.6 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 58.7 kB

  • Original 2.0 MB
  • After minification 2.0 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. Kawai Juku images are well optimized though.

JavaScript Optimization

-74%

Potential reduce by 1.2 MB

  • Original 1.6 MB
  • After minification 1.4 MB
  • After compression 427.3 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 1.2 MB or 74% of the original size.

CSS Optimization

-86%

Potential reduce by 700.3 kB

  • Original 816.0 kB
  • After minification 716.1 kB
  • After compression 115.7 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. Kawai-juku.ac.jp needs all CSS files to be minified and compressed as it can save up to 700.3 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 49 (25%)

Requests Now

200

After Optimization

151

The browser has sent 200 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kawai Juku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

kawai-juku.ac.jp accessibility score

63

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.

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

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

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

kawai-juku.ac.jp best practices score

83

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

kawai-juku.ac.jp 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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kawai-juku.ac.jp 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 Kawai-juku.ac.jp main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

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