5.7 sec in total
930 ms
4.6 sec
177 ms
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.jpWe analyzed Doyukan.co.jp page load time and found that the first response time was 930 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
doyukan.co.jp performance score
name
value
score
weighting
Value4.7 s
13/100
10%
Value14.6 s
0/100
25%
Value8.9 s
16/100
10%
Value2,060 ms
8/100
30%
Value0.02
100/100
15%
Value13.9 s
10/100
10%
930 ms
1054 ms
1058 ms
1061 ms
1488 ms
Our browser made a total of 29 requests to load all elements on the main page. We found that 93% of them (27 requests) were addressed to the original Doyukan.co.jp, 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Doyukan.co.jp.
Page size can be reduced by 120.3 kB (15%)
811.0 kB
690.6 kB
In fact, the total size of Doyukan.co.jp main page is 811.0 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. 15% of websites need less resources to load. Images take 659.6 kB which makes up the majority of the site volume.
Potential reduce by 14.4 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 14.4 kB or 75% of the original size.
Potential reduce by 17.3 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. Doyukan images are well optimized though.
Potential reduce by 76.5 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 76.5 kB or 66% of the original size.
Potential reduce by 12.2 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 12.2 kB or 76% of the original size.
Number of requests can be reduced by 3 (11%)
28
25
The browser has sent 28 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 4 to 1 for JavaScripts and as a result speed up the page load time.
doyukan.co.jp
930 ms
screen.css
1054 ms
home.css
1058 ms
global.css
1061 ms
mootools-1.2-core.js
1488 ms
mootools-1.2-more.js
1314 ms
flowplayer-3.2.6.min.js
565 ms
urchin.js
6 ms
doyukan_logo.png
236 ms
inquery.gif
207 ms
fuzoroi2015.jpg
367 ms
zennouhau2015.jpg
395 ms
kakomon2016.jpg
374 ms
banner01.jpg
591 ms
koretan2016.jpg
2387 ms
quickkakomon2015.jpg
476 ms
header.gif
204 ms
bullet-allow.png
207 ms
home-background.jpg
1188 ms
bg-promotion.png
1333 ms
panel-1.png
207 ms
panel-2.png
214 ms
panel-3.png
1333 ms
panel-4.png
361 ms
panel-5.png
376 ms
panel-6.png
410 ms
news-bar.png
426 ms
global.gif
540 ms
__utm.gif
2 ms
doyukan.co.jp accessibility score
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
<frame> or <iframe> elements do not have a title
Form elements do not have associated labels
doyukan.co.jp best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Registers an unload listener
Browser errors were logged to the console
doyukan.co.jp SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
robots.txt is not valid
JA
JA
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.
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: