Tools & Wizards About Us
jahee.jp screenshot

Report Summary

  • 47

    Performance

    Renders faster than
    66% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

jahee.jp

日本家庭科教育学会

Page Load Speed

51.9 sec in total

First Response

16 sec

Resources Loaded

35.6 sec

Page Rendered

363 ms

jahee.jp screenshot

About Website

Click here to check amazing Jahee content. Otherwise, check out these important facts you probably never knew about jahee.jp

Visit jahee.jp

Key Findings

We analyzed Jahee.jp page load time and found that the first response time was 16 sec and then it took 35.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 4 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

jahee.jp performance score

47

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value6.0 s

13/100

25%

SI (Speed Index)

Value14.1 s

1/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.218

57/100

15%

TTI (Time to Interactive)

Value10.1 s

26/100

10%

Network Requests Diagram

jahee.jp

16023 ms

base.css

1408 ms

swfobject_modified.js

3899 ms

title_top.jpg

19991 ms

menu_top_on.gif

3240 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that all of those requests were addressed to Jahee.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (20 sec) belongs to the original domain Jahee.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.5 kB (33%)

Content Size

40.4 kB

After Optimization

26.9 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Jahee.jp main page is 40.4 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 23.3 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 13.4 kB

  • Original 16.9 kB
  • After minification 13.8 kB
  • After compression 3.5 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 3.1 kB, which is 18% 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 13.4 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 41 B

  • Original 23.3 kB
  • After minification 23.3 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. Jahee images are well optimized though.

CSS Optimization

-52%

Potential reduce by 104 B

  • Original 199 B
  • After minification 112 B
  • After compression 95 B

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. Jahee.jp needs all CSS files to be minified and compressed as it can save up to 104 B or 52% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

16

After Optimization

16

  • Images
  • CSS

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jahee. According to our analytics all requests are already optimized.

Network Requests Diagram

jahee.jp

jahee.jp

16023 ms

base.css

base.css

1408 ms

swfobject_modified.js

swfobject_modified.js

3899 ms

title_top.jpg

title_top.jpg

19991 ms

menu_top_on.gif

menu_top_on.gif

3240 ms

menu_aisatu_off.gif

menu_aisatu_off.gif

9439 ms

menu_gaiyou_off.gif

menu_gaiyou_off.gif

8427 ms

menu_syupan_off.gif

menu_syupan_off.gif

4005 ms

menu_taikai_off.gif

menu_taikai_off.gif

6010 ms

menu_youbou_off.gif

menu_youbou_off.gif

4922 ms

menu_kenkyu_off.gif

menu_kenkyu_off.gif

5050 ms

menu_jyugyou_off.gif

menu_jyugyou_off.gif

7100 ms

menu_hint_off.gif

menu_hint_off.gif

15163 ms

menu_annai_off.gif

menu_annai_off.gif

6806 ms

menu_link_off.gif

menu_link_off.gif

19964 ms

logo.gif

logo.gif

9327 ms

sp.gif

sp.gif

14417 ms

top_photo.jpg

top_photo.jpg

19961 ms

whatsnew.gif

whatsnew.gif

10189 ms

wn_line.gif

wn_line.gif

10369 ms

wn_end.gif

wn_end.gif

7355 ms

toiawase.jpg

toiawase.jpg

19540 ms

Accessibility Review

jahee.jp accessibility score

84

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

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

jahee.jp best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

jahee.jp SEO score

82

Search Engine Optimization Advices

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

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jahee.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Jahee.jp main page’s claimed encoding is shift_jis. 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

jahee.jp

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