Tools & Wizards About Us
gakken-juku.com screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

gakken-juku.com

【公式】個別指導の学習塾なら学研CAIスクール

Page Load Speed

6.1 sec in total

First Response

412 ms

Resources Loaded

5.3 sec

Page Rendered

383 ms

gakken-juku.com screenshot

About Website

Click here to check amazing Gakken Juku content for Japan. Otherwise, check out these important facts you probably never knew about gakken-juku.com

学研CAIスクールの公式サイト。安心してお通いいただける60年間の教育実績から生まれた「学研の塾」です。学校の授業がもっとよくわかる学研の個別指導。

Visit gakken-juku.com

Key Findings

We analyzed Gakken-juku.com page load time and found that the first response time was 412 ms and then it took 5.7 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

gakken-juku.com performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value15.5 s

0/100

25%

SI (Speed Index)

Value9.2 s

13/100

10%

TBT (Total Blocking Time)

Value730 ms

40/100

30%

CLS (Cumulative Layout Shift)

Value0.237

53/100

15%

TTI (Time to Interactive)

Value15.0 s

7/100

10%

Network Requests Diagram

gakken-juku.com

412 ms

gakken-juku.com

908 ms

gtm.js

88 ms

common.css

349 ms

jquery.min.js

36 ms

Our browser made a total of 108 requests to load all elements on the main page. We found that 93% of them (100 requests) were addressed to the original Gakken-juku.com, 4% (4 requests) were made to Googletagmanager.com and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Gakken-juku.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 905.8 kB (55%)

Content Size

1.6 MB

After Optimization

735.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Gakken-juku.com main page is 1.6 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. 45% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 25.5 kB

  • Original 32.8 kB
  • After minification 26.0 kB
  • After compression 7.4 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 6.8 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 25.5 kB or 78% of the original size.

Image Optimization

-55%

Potential reduce by 809.7 kB

  • Original 1.5 MB
  • After minification 665.2 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. Obviously, Gakken Juku needs image optimization as it can save up to 809.7 kB or 55% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-44%

Potential reduce by 44.9 kB

  • Original 102.2 kB
  • After minification 96.2 kB
  • After compression 57.3 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 44.9 kB or 44% of the original size.

CSS Optimization

-81%

Potential reduce by 25.8 kB

  • Original 31.7 kB
  • After minification 27.4 kB
  • After compression 6.0 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. Gakken-juku.com needs all CSS files to be minified and compressed as it can save up to 25.8 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (18%)

Requests Now

106

After Optimization

87

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 106 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gakken 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 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

gakken-juku.com

gakken-juku.com

412 ms

gakken-juku.com

gakken-juku.com

908 ms

gtm.js

gtm.js

88 ms

common.css

common.css

349 ms

jquery.min.js

jquery.min.js

36 ms

script.js

script.js

507 ms

jquery.flatheights.js

jquery.flatheights.js

512 ms

script.js

script.js

736 ms

top.css

top.css

523 ms

imgchange.js

imgchange.js

594 ms

gtm.js

gtm.js

46 ms

logo.png

logo.png

211 ms

head_ttl_tel.png

head_ttl_tel.png

213 ms

logo_educa_nw.png

logo_educa_nw.png

183 ms

head_btn_entry3.png

head_btn_entry3.png

213 ms

head_btn_apply.png

head_btn_apply.png

183 ms

gnavi_home_on.png

gnavi_home_on.png

212 ms

gnavi_school_off.png

gnavi_school_off.png

340 ms

gnavi_course_off.png

gnavi_course_off.png

351 ms

gnavi_idea_off.png

gnavi_idea_off.png

354 ms

gnavi_about_off.png

gnavi_about_off.png

408 ms

gnavi_qa_off.png

gnavi_qa_off.png

409 ms

gnavi_apply_off.png

gnavi_apply_off.png

404 ms

top_main_btn_pre.png

top_main_btn_pre.png

511 ms

top_main_btn_nxt.png

top_main_btn_nxt.png

519 ms

dotto_gry.gif

dotto_gry.gif

523 ms

dash_md.png

dash_md.png

603 ms

top_main_btn_entry2.png

top_main_btn_entry2.png

609 ms

top_main_btn_apply2.png

top_main_btn_apply2.png

610 ms

top_ttl_tel.png

top_ttl_tel.png

686 ms

summer_camp2024_main_img.jpg

summer_camp2024_main_img.jpg

1024 ms

top_main_e-learning.jpg

top_main_e-learning.jpg

1200 ms

top_main_gra_b.jpg

top_main_gra_b.jpg

1389 ms

top_main_gra_a2.jpg

top_main_gra_a2.jpg

1415 ms

top_main_btn_gd_off.png

top_main_btn_gd_off.png

814 ms

top_main_btn_mv_off.png

top_main_btn_mv_off.png

864 ms

bg_dot_gw_lg.png

bg_dot_gw_lg.png

1015 ms

dash_blk_rw.gif

dash_blk_rw.gif

1039 ms

dec_crc_ar.gif

dec_crc_ar.gif

1218 ms

dotto_md.gif

dotto_md.gif

1192 ms

top_entaply_bg_ttl.png

top_entaply_bg_ttl.png

1216 ms

top_entaply_bg.png

top_entaply_bg.png

1529 ms

top_entaply_bnr_summer2024.png

top_entaply_bnr_summer2024.png

1372 ms

top_entaply_bnr_tk.png

top_entaply_bnr_tk.png

1395 ms

icn_pen.png

icn_pen.png

1421 ms

top_gd_bg_lnk.png

top_gd_bg_lnk.png

1543 ms

top_gd_bg_lnk_tp.png

top_gd_bg_lnk_tp.png

1585 ms

analytics.js

analytics.js

48 ms

gtm.js

gtm.js

46 ms

top_gd_ttl_pt1.png

top_gd_ttl_pt1.png

1398 ms

top_gd_1_gra1.jpg

top_gd_1_gra1.jpg

1439 ms

top_gd_ttl_pt2.png

top_gd_ttl_pt2.png

1444 ms

collect

collect

17 ms

top_gd_1_gra2.jpg

top_gd_1_gra2.jpg

1491 ms

top_gd_2_gras.jpg

top_gd_2_gras.jpg

1506 ms

top_gd_2_bg.png

top_gd_2_bg.png

1538 ms

js

js

69 ms

top_gd_ttl_jn.png

top_gd_ttl_jn.png

1447 ms

top_gd_ttl_ht.png

top_gd_ttl_ht.png

1470 ms

top_gd_4_gra.jpg

top_gd_4_gra.jpg

1472 ms

icn_smaile.png

icn_smaile.png

1466 ms

top_follow_gra.png

top_follow_gra.png

1479 ms

dotto_grys.gif

dotto_grys.gif

1517 ms

icn_src.png

icn_src.png

1471 ms

icn_map.png

icn_map.png

1502 ms

side_map_gra.png

side_map_gra.png

1508 ms

side_map_btn_hk_off.png

side_map_btn_hk_off.png

1436 ms

side_map_btn_hr_off.png

side_map_btn_hr_off.png

1448 ms

side_map_btn_kn_off.png

side_map_btn_kn_off.png

1492 ms

side_map_btn_kt_off.png

side_map_btn_kt_off.png

1493 ms

side_map_btn_cb_off.png

side_map_btn_cb_off.png

1411 ms

side_map_btn_cg_off.png

side_map_btn_cg_off.png

1369 ms

side_map_btn_ks_off.png

side_map_btn_ks_off.png

1239 ms

icn_home.png

icn_home.png

1239 ms

btn_src_s.png

btn_src_s.png

1238 ms

icn_mn_grys.png

icn_mn_grys.png

1185 ms

icn_news.png

icn_news.png

1227 ms

dash_gryb.gif

dash_gryb.gif

1217 ms

top_summer2024_banner_img.png

top_summer2024_banner_img.png

1207 ms

bnr_gdls.png

bnr_gdls.png

1061 ms

bnr_chrome2.png

bnr_chrome2.png

1070 ms

top_campaign_bnr_asugaku.jpg

top_campaign_bnr_asugaku.jpg

1181 ms

side_bnr_qa.png

side_bnr_qa.png

1182 ms

side_lnk_ttl.png

side_lnk_ttl.png

1207 ms

side_bnr_gakken.png

side_bnr_gakken.png

1074 ms

side_bnr_kidsnet.png

side_bnr_kidsnet.png

1093 ms

side_bnr_gakuseito.png

side_bnr_gakuseito.png

1063 ms

side_bnr_saiencekids.png

side_bnr_saiencekids.png

1188 ms

foot_bg.png

foot_bg.png

1316 ms

foot_bg_pagetp.png

foot_bg_pagetp.png

1150 ms

dec_crc_ar_wh.gif

dec_crc_ar_wh.gif

1133 ms

dec_wh.gif

dec_wh.gif

1097 ms

foot_logo_n.png

foot_logo_n.png

1092 ms

gnavi_school_on.png

gnavi_school_on.png

1188 ms

gnavi_course_on.png

gnavi_course_on.png

1126 ms

gnavi_idea_on.png

gnavi_idea_on.png

1161 ms

gnavi_about_on.png

gnavi_about_on.png

1166 ms

gnavi_qa_on.png

gnavi_qa_on.png

1157 ms

gnavi_apply_on.png

gnavi_apply_on.png

1180 ms

top_main_btn_gd_on.png

top_main_btn_gd_on.png

1134 ms

top_main_btn_mv_on.png

top_main_btn_mv_on.png

1150 ms

side_map_btn_hk_on.png

side_map_btn_hk_on.png

1137 ms

side_map_btn_hr_on.png

side_map_btn_hr_on.png

1199 ms

side_map_btn_kn_on.png

side_map_btn_kn_on.png

1189 ms

side_map_btn_kt_on.png

side_map_btn_kt_on.png

1172 ms

side_map_btn_cb_on.png

side_map_btn_cb_on.png

1107 ms

side_map_btn_cg_on.png

side_map_btn_cg_on.png

1119 ms

side_map_btn_ks_on.png

side_map_btn_ks_on.png

1137 ms

Accessibility Review

gakken-juku.com accessibility score

84

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

gakken-juku.com 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

gakken-juku.com SEO score

76

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

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 doesn't use 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 Gakken-juku.com 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 Gakken-juku.com 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

gakken-juku.com

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