Access gakken.co.jp. ホーム | 株式会社学研ホールディングス

name

value

score

weighting

FCP (First Contentful Paint)

Value14.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value51.9 s

0/100

25%

SI (Speed Index)

Value27.8 s

0/100

10%

TBT (Total Blocking Time)

Value1,830 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.28

43/100

15%

TTI (Time to Interactive)

Value56.6 s

0/100

10%

gakken.co.jp

538 ms

www.gakken.co.jp

1062 ms

index.html

2 ms

index.html

682 ms

base.2023-10-30-11-52-17-060.cache.css

250 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 91% of them (61 requests) were addressed to the original Gakken.co.jp, 3% (2 requests) were made to Fonts.gstatic.com and 1% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Gakken.co.jp.

Content Size

8.5 MB

After Optimization

8.1 MB

In fact, the total size of Gakken.co.jp main page is 8.5 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 7.9 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 285.7 kB

Original 316.7 kB
After minification 297.7 kB
After compression 31.0 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. 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 285.7 kB or 90% of the original size.

Image Optimization

-1%

Potential reduce by 97.1 kB

Original 7.9 MB
After minification 7.8 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. Gakken images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 12.5 kB

Original 165.1 kB
After minification 164.9 kB
After compression 152.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-28%

Potential reduce by 32.4 kB

Original 114.2 kB
After minification 114.2 kB
After compression 81.8 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.co.jp needs all CSS files to be minified and compressed as it can save up to 32.4 kB or 28% of the original size.

Requests Now

After Optimization

The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gakken. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

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

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

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

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

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

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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/).

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 Gakken.co.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 Gakken.co.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

gakken.co.jp

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

Report Summary

Performance

Accessibility

Best Practices

SEO

ホーム | 株式会社学研ホールディングス

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

gakken.co.jp

www.gakken.co.jp

index.html

index.html

base.2023-10-30-11-52-17-060.cache.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

gakken.co.jp

www.gakken.co.jp

index.html

index.html

base.2023-10-30-11-52-17-060.cache.css

layout.2023-11-09-16-59-28-568.cache.css

styles.2023-12-19-11-22-39-085.cache.css

edited.2024-03-21-15-33-37-062.cache.css

init-behaviour.2022-09-16-16-38-56-669.cache.js

start.2024-03-27-18-24-20-360.cache.js

custom.2024-03-27-18-24-29-208.cache.js

js

ss_search.css

yearSuffixPrefix.js

changeTabBasic.js

newIconBasic.js

css2

rou8die.js

p.gif

pdf.png

20240430_08.webp

20240430_07.webp

20240430_06.webp

TOP_FCC.jpg

top_info.jpg

about.jpg

top_info.jpg

top_service_sp.jpg

top_sustainability.jpg

top_ir.jpg

top_adoption.jpg

0830-409_1.jpg

0039-2%20(1).jpg

0830-662.jpg

0830-846.jpg

0019-2%20(2).jpg

banner_kosodate_600x240.jpg

kyouikusougoukennkuyujyo.jpg

banner.jpg

gakken-kagakusouzou-kenkyujyo.jpg

E3_gakken-no-hoikuyouhin-oyakokan.jpg

kidsnet.png

hES36X5pHAIBjmS84VL0Bue83nUMR2kN.ttf