Tools & Wizards About Us
ua-book.or.jp screenshot

Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

ua-book.or.jp

一般財団法人 放送大学教育振興会 |

Page Load Speed

3.3 sec in total

First Response

418 ms

Resources Loaded

2.6 sec

Page Rendered

314 ms

ua-book.or.jp screenshot

About Website

Click here to check amazing Ua Book content for Japan. Otherwise, check out these important facts you probably never knew about ua-book.or.jp

放送大学教育振興会では、放送大学のテキストとビデオを発行しています。テキストの購入も可能です。

Visit ua-book.or.jp

Key Findings

We analyzed Ua-book.or.jp page load time and found that the first response time was 418 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

ua-book.or.jp performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.4 s

0/100

25%

SI (Speed Index)

Value18.5 s

0/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.198

62/100

15%

TTI (Time to Interactive)

Value11.5 s

18/100

10%

Network Requests Diagram

ua-book.or.jp

418 ms

basic.css

197 ms

news.html

528 ms

logo.jpg

356 ms

header_agree.gif

372 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that all of those requests were addressed to Ua-book.or.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Ua-book.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.5 kB (11%)

Content Size

119.2 kB

After Optimization

105.7 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Ua-book.or.jp main page is 119.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 101.8 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 9.4 kB

  • Original 12.3 kB
  • After minification 11.2 kB
  • After compression 2.9 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 9.4 kB or 76% of the original size.

Image Optimization

-0%

Potential reduce by 51 B

  • Original 101.8 kB
  • After minification 101.7 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. Ua Book images are well optimized though.

CSS Optimization

-79%

Potential reduce by 4.1 kB

  • Original 5.1 kB
  • After minification 4.3 kB
  • After compression 1.1 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. Ua-book.or.jp needs all CSS files to be minified and compressed as it can save up to 4.1 kB or 79% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

47

After Optimization

47

  • AJAX
  • Images
  • CSS

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ua Book. According to our analytics all requests are already optimized.

Network Requests Diagram

ua-book.or.jp

ua-book.or.jp

418 ms

basic.css

basic.css

197 ms

news.html

news.html

528 ms

logo.jpg

logo.jpg

356 ms

header_agree.gif

header_agree.gif

372 ms

header_privacy.gif

header_privacy.gif

385 ms

header_sitemap.gif

header_sitemap.gif

418 ms

top_image4.jpg

top_image4.jpg

1445 ms

navi01.gif

navi01.gif

532 ms

navi02.gif

navi02.gif

556 ms

navi03.gif

navi03.gif

578 ms

navi04.gif

navi04.gif

626 ms

navi05.gif

navi05.gif

699 ms

navi06.gif

navi06.gif

707 ms

top_news.gif

top_news.gif

739 ms

side_textshop.gif

side_textshop.gif

771 ms

side_bangumi.gif

side_bangumi.gif

835 ms

side_namesearch.gif

side_namesearch.gif

872 ms

side_jenre.gif

side_jenre.gif

884 ms

side_Postcard.gif

side_Postcard.gif

922 ms

side_fax.gif

side_fax.gif

963 ms

side_email.gif

side_email.gif

1043 ms

side_areasearch.gif

side_areasearch.gif

1046 ms

side_link.gif

side_link.gif

1059 ms

pdf_banner.gif

pdf_banner.gif

1107 ms

kyara.gif

kyara.gif

1156 ms

line.gif

line.gif

1268 ms

bg.gif

bg.gif

1035 ms

news.css

news.css

892 ms

header_agree_r.gif

header_agree_r.gif

196 ms

header_link_r.gif

header_link_r.gif

212 ms

header_sitemap_r.gif

header_sitemap_r.gif

187 ms

present_banner_r01.gif

present_banner_r01.gif

179 ms

navi_r01.gif

navi_r01.gif

177 ms

navi_r02.gif

navi_r02.gif

211 ms

navi_r03.gif

navi_r03.gif

352 ms

navi_r04.gif

navi_r04.gif

356 ms

navi_r05.gif

navi_r05.gif

370 ms

navi_r06.gif

navi_r06.gif

388 ms

side_bangumi_r.gif

side_bangumi_r.gif

419 ms

side_namesearch_r.gif

side_namesearch_r.gif

418 ms

side_net_r.gif

side_net_r.gif

526 ms

side_jenre_r.gif

side_jenre_r.gif

533 ms

side_Postcard_r.gif

side_Postcard_r.gif

556 ms

side_fax_r.gif

side_fax_r.gif

581 ms

side_email_r.gif

side_email_r.gif

626 ms

side_areasearch_r.gif

side_areasearch_r.gif

628 ms

pdf_banner_r.gif

pdf_banner_r.gif

701 ms

Accessibility Review

ua-book.or.jp accessibility score

100

Accessibility Issues

Best Practices

ua-book.or.jp best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

ua-book.or.jp SEO score

86

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

Links do not have descriptive text

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

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 Ua-book.or.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 Ua-book.or.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

ua-book.or.jp

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