Tools & Wizards About Us
doyukan.co.jp screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    45% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

doyukan.co.jp

経営・経済・図書出版　同友館

Page Load Speed

3.3 sec in total

First Response

357 ms

Resources Loaded

2.8 sec

Page Rendered

109 ms

doyukan.co.jp screenshot

About Website

Welcome to doyukan.co.jp homepage info - get ready to check Doyukan best content for Japan right away, or after learning these important things about doyukan.co.jp

中小企業の経営書に特化した出版社である同友館ウェブサイトでは、全ての同友館出版物がオンラインでご購入頂けます。経営書の著者によるセミナーや、セミナーの動画配信も行っています。

Visit doyukan.co.jp

Key Findings

We analyzed Doyukan.co.jp page load time and found that the first response time was 357 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 55% of websites can load faster.

Performance Metrics

doyukan.co.jp performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value16.7 s

0/100

25%

SI (Speed Index)

Value9.6 s

11/100

10%

TBT (Total Blocking Time)

Value1,040 ms

26/100

30%

CLS (Cumulative Layout Shift)

Value0.023

100/100

15%

TTI (Time to Interactive)

Value14.6 s

8/100

10%

Network Requests Diagram

doyukan.co.jp

357 ms

www.doyukan.co.jp

881 ms

screen.css

342 ms

home2.css

504 ms

global.css

514 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 66% of them (27 requests) were addressed to the original Doyukan.co.jp, 12% (5 requests) were made to Youtube.com and 5% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (881 ms) belongs to the original domain Doyukan.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 119.9 kB (14%)

Content Size

835.2 kB

After Optimization

715.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Doyukan.co.jp main page is 835.2 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. 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 455.1 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 18.5 kB

  • Original 23.3 kB
  • After minification 16.2 kB
  • After compression 4.8 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 7.0 kB, which is 30% 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 18.5 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 7.7 kB

  • Original 455.1 kB
  • After minification 447.4 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. Doyukan images are well optimized though.

JavaScript Optimization

-28%

Potential reduce by 79.0 kB

  • Original 279.4 kB
  • After minification 278.0 kB
  • After compression 200.4 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 79.0 kB or 28% of the original size.

CSS Optimization

-19%

Potential reduce by 14.6 kB

  • Original 77.4 kB
  • After minification 73.5 kB
  • After compression 62.8 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. Doyukan.co.jp needs all CSS files to be minified and compressed as it can save up to 14.6 kB or 19% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (30%)

Requests Now

37

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Doyukan. 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 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

doyukan.co.jp

doyukan.co.jp

357 ms

www.doyukan.co.jp

www.doyukan.co.jp

881 ms

screen.css

screen.css

342 ms

home2.css

home2.css

504 ms

global.css

global.css

514 ms

mootools-1.2-core.js

mootools-1.2-core.js

861 ms

mootools-1.2-more.js

mootools-1.2-more.js

692 ms

flowplayer-3.2.6.min.js

flowplayer-3.2.6.min.js

713 ms

urchin.js

urchin.js

16 ms

header.gif

header.gif

191 ms

doyukan_logo.png

doyukan_logo.png

190 ms

inquery.gif

inquery.gif

191 ms

bullet-allow.png

bullet-allow.png

215 ms

home-background-02.jpg

home-background-02.jpg

838 ms

fuzoroi2023.jpg

fuzoroi2023.jpg

215 ms

kaisharyoku.jpg

kaisharyoku.jpg

480 ms

shokuninzukan.new.jpg

shokuninzukan.new.jpg

481 ms

jirei4zenchizennou2024.jpg

jirei4zenchizennou2024.jpg

480 ms

30jirei4goukakutentoppa2023.jpg

30jirei4goukakutentoppa2023.jpg

609 ms

zennouhau2023.jpg

zennouhau2023.jpg

481 ms

kakomon2024.jpg

kakomon2024.jpg

521 ms

Atkinson1.jpg

Atkinson1.jpg

522 ms

Atkinson2.jpg

Atkinson2.jpg

522 ms

9FNOc-47RNI

9FNOc-47RNI

137 ms

panel-1.png

panel-1.png

584 ms

panel-2.png

panel-2.png

686 ms

panel-3.png

panel-3.png

687 ms

news-bar.png

news-bar.png

687 ms

global.gif

global.gif

689 ms

__utm.gif

__utm.gif

17 ms

www-player.css

www-player.css

9 ms

www-embed-player.js

www-embed-player.js

30 ms

base.js

base.js

55 ms

ad_status.js

ad_status.js

147 ms

9Z66e_kIUHiT36NNaH3ECtVnZbQwRKz1JAady_W2534.js

9Z66e_kIUHiT36NNaH3ECtVnZbQwRKz1JAady_W2534.js

94 ms

embed.js

embed.js

31 ms

id

id

17 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

111 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

111 ms

Create

Create

105 ms

GenerateIT

GenerateIT

15 ms

Accessibility Review

doyukan.co.jp accessibility score

79

Accessibility Issues

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

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

High

Form elements do not have associated labels

Best Practices

doyukan.co.jp best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

doyukan.co.jp SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    SHIFT-JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Doyukan.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 Doyukan.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

doyukan.co.jp

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