Tools & Wizards About Us
damnet.or.jp screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 49

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

damnet.or.jp

一般財団法人 日本ダム協会

Page Load Speed

3.6 sec in total

First Response

920 ms

Resources Loaded

2.5 sec

Page Rendered

180 ms

damnet.or.jp screenshot

About Website

Click here to check amazing Damnet content for Japan. Otherwise, check out these important facts you probably never knew about damnet.or.jp

日本ダム協会ホームページでは、ダムに関する様々な情報を提供しています。

Visit damnet.or.jp

Key Findings

We analyzed Damnet.or.jp page load time and found that the first response time was 920 ms and then it took 2.7 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

damnet.or.jp performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

36/100

10%

LCP (Largest Contentful Paint)

Value13.6 s

0/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value1,640 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value15.3 s

7/100

10%

Network Requests Diagram

damnet.or.jp

920 ms

dasujdf.js

538 ms

style.css

566 ms

space1.gif

185 ms

top1.jpg

224 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that all of those requests were addressed to Damnet.or.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Damnet.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.1 kB (54%)

Content Size

115.6 kB

After Optimization

53.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Damnet.or.jp main page is 115.6 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. Only 10% of websites need less resources to load. HTML takes 57.3 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 51.9 kB

  • Original 57.3 kB
  • After minification 40.0 kB
  • After compression 5.4 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. This page needs HTML code to be minified as it can gain 17.4 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 51.9 kB or 91% of the original size.

Image Optimization

-17%

Potential reduce by 9.4 kB

  • Original 57.0 kB
  • After minification 47.6 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. Obviously, Damnet needs image optimization as it can save up to 9.4 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-55%

Potential reduce by 513 B

  • Original 928 B
  • After minification 805 B
  • After compression 415 B

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 513 B or 55% of the original size.

CSS Optimization

-60%

Potential reduce by 215 B

  • Original 359 B
  • After minification 264 B
  • After compression 144 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. Damnet.or.jp needs all CSS files to be minified and compressed as it can save up to 215 B or 60% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (30%)

Requests Now

23

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Damnet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

damnet.or.jp

damnet.or.jp

920 ms

dasujdf.js

dasujdf.js

538 ms

style.css

style.css

566 ms

space1.gif

space1.gif

185 ms

top1.jpg

top1.jpg

224 ms

top2.jpg

top2.jpg

505 ms

yama03_1.jpg

yama03_1.jpg

183 ms

yama03_3.jpg

yama03_3.jpg

333 ms

wwwcount.cgi

wwwcount.cgi

375 ms

ao_back.gif

ao_back.gif

324 ms

back01.jpg

back01.jpg

380 ms

01.gif

01.gif

387 ms

02.gif

02.gif

399 ms

t_damukyoukai2.gif

t_damukyoukai2.gif

513 ms

t_kids.gif

t_kids.gif

567 ms

t_damuzakugaku2.gif

t_damuzakugaku2.gif

586 ms

t_syashin.gif

t_syashin.gif

588 ms

yama01.gif

yama01.gif

602 ms

yama02.gif

yama02.gif

638 ms

yama04.gif

yama04.gif

693 ms

bar.gif

bar.gif

752 ms

wwwcount.cgi

wwwcount.cgi

802 ms

wwwcountTOP.cgi

wwwcountTOP.cgi

1339 ms

yama03_2.jpg

yama03_2.jpg

331 ms

Accessibility Review

damnet.or.jp accessibility score

49

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

damnet.or.jp best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

damnet.or.jp SEO score

69

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

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 Damnet.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 Damnet.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

damnet.or.jp

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