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ybook.co.jp screenshot

Report Summary

  • 67

    Performance

    Renders faster than
    80% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 48% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

ybook.co.jp

Yokohama Publishers

Page Load Speed

5.8 sec in total

First Response

530 ms

Resources Loaded

4.8 sec

Page Rendered

510 ms

ybook.co.jp screenshot

About Website

Click here to check amazing Ybook content for South Africa. Otherwise, check out these important facts you probably never knew about ybook.co.jp

Visit ybook.co.jp

Key Findings

We analyzed Ybook.co.jp page load time and found that the first response time was 530 ms and then it took 5.3 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

ybook.co.jp performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

58/100

10%

LCP (Largest Contentful Paint)

Value5.2 s

23/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.111

87/100

15%

TTI (Time to Interactive)

Value2.9 s

96/100

10%

Network Requests Diagram

ybook.co.jp

530 ms

logo.html

171 ms

body2.html

330 ms

Toplogo2.jpg

245 ms

Toplogo4.jpg

485 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that all of those requests were addressed to Ybook.co.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (3.6 sec) belongs to the original domain Ybook.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.6 kB (5%)

Content Size

198.2 kB

After Optimization

188.6 kB

  • HTML
  • Images

In fact, the total size of Ybook.co.jp main page is 198.2 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. 20% of websites need less resources to load. Images take 197.6 kB which makes up the majority of the site volume.

HTML Optimization

-42%

Potential reduce by 254 B

  • Original 607 B
  • After minification 576 B
  • After compression 353 B

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 254 B or 42% of the original size.

Image Optimization

-5%

Potential reduce by 9.4 kB

  • Original 197.6 kB
  • After minification 188.2 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. Ybook images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

30

After Optimization

30

  • AJAX
  • Images

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ybook. According to our analytics all requests are already optimized.

Network Requests Diagram

ybook.co.jp

ybook.co.jp

530 ms

logo.html

logo.html

171 ms

body2.html

body2.html

330 ms

Toplogo2.jpg

Toplogo2.jpg

245 ms

Toplogo4.jpg

Toplogo4.jpg

485 ms

Topu11.jpg

Topu11.jpg

349 ms

Topu22.jpg

Topu22.jpg

353 ms

menu2.html

menu2.html

194 ms

Top.htm

Top.htm

496 ms

menu11.jpg

menu11.jpg

177 ms

menu44.jpg

menu44.jpg

175 ms

menu22.jpg

menu22.jpg

177 ms

menu33.jpg

menu33.jpg

179 ms

menu5.jpg

menu5.jpg

295 ms

inte_bg.gif

inte_bg.gif

245 ms

yokotate1.jpg

yokotate1.jpg

247 ms

yokotate4.jpg

yokotate4.jpg

245 ms

yokotate3.jpg

yokotate3.jpg

250 ms

visa1.gif

visa1.gif

354 ms

master2.jpg

master2.jpg

608 ms

1010.gif

1010.gif

417 ms

image6.gif

image6.gif

419 ms

v2ky02.JPG

v2ky02.JPG

593 ms

pjo.jpg

pjo.jpg

777 ms

ehi-hyo.jpg

ehi-hyo.jpg

677 ms

naca2007-2.gif

naca2007-2.gif

763 ms

tai.gif

tai.gif

764 ms

bfsiii2.jpg

bfsiii2.jpg

3622 ms

KITAII-11.gif

KITAII-11.gif

1018 ms

bs2.jpeg

bs2.jpeg

1002 ms

pub5.gif

pub5.gif

936 ms

Accessibility Review

ybook.co.jp accessibility score

79

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

Image elements do not have [alt] attributes

Best Practices

ybook.co.jp best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

ybook.co.jp SEO score

75

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ybook.co.jp can be misinterpreted by Google and other search engines. Our service has detected that English 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 Ybook.co.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

ybook.co.jp

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