Tools & Wizards About Us
kawai-juku.ac.jp screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

kawai-juku.ac.jp

大学受験の予備校・塾 河合塾

Page Load Speed

9.2 sec in total

First Response

527 ms

Resources Loaded

7.8 sec

Page Rendered

936 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 527 ms and then it took 8.7 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

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value19.2 s

0/100

25%

SI (Speed Index)

Value15.3 s

1/100

10%

TBT (Total Blocking Time)

Value6,370 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.053

98/100

15%

TTI (Time to Interactive)

Value27.9 s

0/100

10%

Network Requests Diagram

kawai-juku.ac.jp

527 ms

www.kawai-juku.ac.jp

865 ms

www.kawai-juku.ac.jp

1287 ms

kawai.css

17 ms

device-class-injector.js

40 ms

Our browser made a total of 153 requests to load all elements on the main page. We found that 58% of them (88 requests) were addressed to the original Kawai-juku.ac.jp, 4% (6 requests) were made to Youtube.com and 3% (4 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Dsp.logly.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 571.1 kB (14%)

Content Size

4.1 MB

After Optimization

3.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kawai-juku.ac.jp main page is 4.1 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. Only a small number of websites need less resources to load. Images take 3.5 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 90.0 kB

  • Original 108.6 kB
  • After minification 86.2 kB
  • After compression 18.6 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 22.4 kB, which is 21% 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 90.0 kB or 83% of the original size.

Image Optimization

-7%

Potential reduce by 253.4 kB

  • Original 3.5 MB
  • After minification 3.2 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

-45%

Potential reduce by 227.7 kB

  • Original 508.2 kB
  • After minification 507.7 kB
  • After compression 280.5 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 227.7 kB or 45% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 59.2 kB
  • After minification 59.2 kB
  • After compression 59.2 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 has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 56 (39%)

Requests Now

142

After Optimization

86

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 142 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 37 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

kawai-juku.ac.jp

kawai-juku.ac.jp

527 ms

www.kawai-juku.ac.jp

www.kawai-juku.ac.jp

865 ms

www.kawai-juku.ac.jp

www.kawai-juku.ac.jp

1287 ms

kawai.css

kawai.css

17 ms

device-class-injector.js

device-class-injector.js

40 ms

satelliteLib-12db19e5a61a2a054804506bd498ce74b001c43c.js

satelliteLib-12db19e5a61a2a054804506bd498ce74b001c43c.js

107 ms

sitetop.css

sitetop.css

57 ms

recommendations.js

recommendations.js

64 ms

sync_suggest.js

sync_suggest.js

1710 ms

jquery-3.2.1.min.js

jquery-3.2.1.min.js

54 ms

velocity-1.5.0.min.js

velocity-1.5.0.min.js

47 ms

pubsub.min.js

pubsub.min.js

61 ms

course-local-navi.js

course-local-navi.js

50 ms

kawai.bundle.js

kawai.bundle.js

63 ms

search-result-page.js

search-result-page.js

64 ms

front-common-parts.js

front-common-parts.js

71 ms

read-event-html.js

read-event-html.js

69 ms

entry-interaction.js

entry-interaction.js

91 ms

EX98bd53d32e3144c8924617864af3132b-libraryCode_source.min.js

EX98bd53d32e3144c8924617864af3132b-libraryCode_source.min.js

233 ms

js

js

344 ms

ytag.js

ytag.js

1326 ms

seg.js

seg.js

1809 ms

lt.js

lt.js

341 ms

uwt.js

uwt.js

323 ms

fbevents.js

fbevents.js

343 ms

bat.js

bat.js

341 ms

events.js

events.js

342 ms

obtp.js

obtp.js

339 ms

logo_kawaijuku-group_small.gif

logo_kawaijuku-group_small.gif

265 ms

Sis8qxsbmmQ

Sis8qxsbmmQ

463 ms

logo_kawaijuku.png

logo_kawaijuku.png

187 ms

img_header_lead.png

img_header_lead.png

188 ms

spr_32.png

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178 ms

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177 ms

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179 ms

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227 ms

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401 ms

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248 ms

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401 ms

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250 ms

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251 ms

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418 ms

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419 ms

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415 ms

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mv_art2023_sp.jpg

418 ms

mv_cosmo_pc.jpg

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570 ms

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566 ms

mv_kikoku_pc.jpg

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462 ms

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524 ms

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520 ms

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mv_sc-jhschool_sp.jpg

465 ms

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mv_manavis2024-06_pc.jpg

565 ms

mv_manavis2024-06_sp.jpg

mv_manavis2024-06_sp.jpg

701 ms

image.jsp

image.jsp

728 ms

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727 ms

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704 ms

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729 ms

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727 ms

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729 ms

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1165 ms

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img_box-001_01.png

1168 ms

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1167 ms

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1171 ms

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1158 ms

rd

rd

39 ms

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990 ms

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995 ms

tokyo_igrttksjyynmdqrbjisxebqeitcjnirj.jpg

tokyo_igrttksjyynmdqrbjisxebqeitcjnirj.jpg

993 ms

kyoto_swwgxvdsbjaknmbexiqlyowrwiubqrai.jpg

kyoto_swwgxvdsbjaknmbexiqlyowrwiubqrai.jpg

994 ms

medical_njfkoboubitkkwscpeiuihdggaptjuti.jpg

medical_njfkoboubitkkwscpeiuihdggaptjuti.jpg

989 ms

img_h-university_index_menu_hokkaido_hvhreohetbxkwsnctmarpmmixwgldbst.jpg

img_h-university_index_menu_hokkaido_hvhreohetbxkwsnctmarpmmixwgldbst.jpg

990 ms

dest5.html

dest5.html

224 ms

id

id

325 ms

img_h-university_index_menu_tohoku_txvubqrphwqhyolngnsvamftsrjhpjzp.jpg

img_h-university_index_menu_tohoku_txvubqrphwqhyolngnsvamftsrjhpjzp.jpg

939 ms

img_h-university_index_menu_nagoya_cvldnhwfetcqmlxruesrlkjxrcqdhvxs.jpg

img_h-university_index_menu_nagoya_cvldnhwfetcqmlxruesrlkjxrcqdhvxs.jpg

927 ms

img_h-university_index_menu_osaka_mxnkvypnzxtnikktjorqrhglzllsoled.jpg

img_h-university_index_menu_osaka_mxnkvypnzxtnikktjorqrhglzllsoled.jpg

931 ms

err.gif

err.gif

1449 ms

main.MTIyYzc3NzllMA.js

main.MTIyYzc3NzllMA.js

105 ms

img_h-university_index_menu_hiroshima_mieebvbovkzgoomskpetonhxthsxwmmd.jpg

img_h-university_index_menu_hiroshima_mieebvbovkzgoomskpetonhxthsxwmmd.jpg

818 ms

err.gif

err.gif

1517 ms

js

js

77 ms

js

js

178 ms

js

js

176 ms

www-player.css

www-player.css

34 ms

www-embed-player.js

www-embed-player.js

132 ms

base.js

base.js

337 ms

img_h-university_index_menu_kyushu_ndfiiwpkkftgtgrlwqmuzmcfvepgiojn.jpg

img_h-university_index_menu_kyushu_ndfiiwpkkftgtgrlwqmuzmcfvepgiojn.jpg

779 ms

waseda_lkibovtlzzkxhewhgyphlrcckbcdhktu.jpg

waseda_lkibovtlzzkxhewhgyphlrcckbcdhktu.jpg

776 ms

keio_hkigqlnsyybcucnjaensyrcrrfwmnfbv.jpg

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762 ms

image.jsp

image.jsp

761 ms

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764 ms

adsct

adsct

747 ms

adsct

adsct

761 ms

image.jsp

image.jsp

759 ms

adsct

adsct

746 ms

adsct

adsct

754 ms

ibs:dpid=411&dpuuid=ZjYzlwAAAIvbdgN_

ibs:dpid=411&dpuuid=ZjYzlwAAAIvbdgN_

89 ms

image.jsp

image.jsp

717 ms

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716 ms

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663 ms

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621 ms

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617 ms

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617 ms

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482 ms

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479 ms

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478 ms

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457 ms

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458 ms

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459 ms

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458 ms

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457 ms

ad_status.js

ad_status.js

333 ms

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280 ms

jRYISRuM9q7e_xyYaLp_fsq3qnLjbNevd8JDa-bOkpI.js

jRYISRuM9q7e_xyYaLp_fsq3qnLjbNevd8JDa-bOkpI.js

248 ms

embed.js

embed.js

125 ms

hs_mirai_ppxqmngqirmyyiwewatyrdxjndwlxtyz.png

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137 ms

spr_64.png

spr_64.png

133 ms

privacy_mark.png

privacy_mark.png

128 ms

spr_84.png

spr_84.png

92 ms

logo_kawaijuku-group.png

logo_kawaijuku-group.png

92 ms

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KFOmCnqEu92Fr1Mu4mxP.ttf

87 ms

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98 ms

Create

Create

145 ms

id

id

139 ms

c4gde0vi3x.js

c4gde0vi3x.js

1040 ms

so_sg.js

so_sg.js

211 ms

im-uid.js

im-uid.js

42 ms

adsct

adsct

26 ms

GenerateIT

GenerateIT

20 ms

adsct

adsct

107 ms

get

get

187 ms

s07491021382156

s07491021382156

10 ms

js

js

729 ms

pixel.js

pixel.js

228 ms

p

p

688 ms

smallest.png

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23 ms

sosync

sosync

180 ms

19 ms

pixel

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49 ms

v2

v2

3 ms

sync

sync

692 ms

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33 ms

54 ms

pixel

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19 ms

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20 ms

sync

sync

769 ms

log_event

log_event

17 ms

sd

sd

12 ms

Pug

Pug

22 ms

hs

hs

690 ms

um

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38 ms

tap.php

tap.php

19 ms

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

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

High

Browser errors were logged to the console

High

Page has valid source maps

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

kawai-juku.ac.jp

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