Tools & Wizards About Us

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

i-kahaku.jp

愛媛県総合科学博物館

Page Load Speed

9.3 sec in total

First Response

1.4 sec

Resources Loaded

7.5 sec

Page Rendered

465 ms

About Website

Click here to check amazing I Kahaku content for Japan. Otherwise, check out these important facts you probably never knew about i-kahaku.jp

プラネタリウムの番組案内、家庭でできる実験紹介などコンテンツも充実。

Visit i-kahaku.jp

Key Findings

We analyzed I-kahaku.jp page load time and found that the first response time was 1.4 sec and then it took 8 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

i-kahaku.jp performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.9 s

1/100

10%

LCP (Largest Contentful Paint)

Value12.6 s

0/100

25%

SI (Speed Index)

Value12.5 s

3/100

10%

TBT (Total Blocking Time)

Value810 ms

36/100

30%

CLS (Cumulative Layout Shift)

Value0.353

31/100

15%

TTI (Time to Interactive)

Value14.3 s

9/100

10%

Network Requests Diagram

i-kahaku.jp

1355 ms

analytics.js

363 ms

countdown.js

370 ms

AC_RunActiveContent.js

384 ms

jquery-1.9.0.min.js

1336 ms

Our browser made a total of 140 requests to load all elements on the main page. We found that 66% of them (92 requests) were addressed to the original I-kahaku.jp, 24% (34 requests) were made to Static.xx.fbcdn.net and 4% (6 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain I-kahaku.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 226.8 kB (26%)

Content Size

871.3 kB

After Optimization

644.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of I-kahaku.jp main page is 871.3 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. 50% of websites need less resources to load. Images take 587.8 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 69.8 kB

  • Original 81.7 kB
  • After minification 51.1 kB
  • After compression 11.9 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. This page needs HTML code to be minified as it can gain 30.6 kB, which is 37% 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 69.8 kB or 85% of the original size.

Image Optimization

-3%

Potential reduce by 18.1 kB

  • Original 587.8 kB
  • After minification 569.7 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. I Kahaku images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 138.5 kB

  • Original 201.2 kB
  • After minification 177.1 kB
  • After compression 62.6 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 138.5 kB or 69% of the original size.

CSS Optimization

-61%

Potential reduce by 395 B

  • Original 647 B
  • After minification 442 B
  • After compression 252 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. I-kahaku.jp needs all CSS files to be minified and compressed as it can save up to 395 B or 61% of the original size.

Requests Breakdown

Number of requests can be reduced by 47 (34%)

Requests Now

137

After Optimization

90

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 137 CSS, Javascripts, AJAX and image requests in order to completely render the main page of I Kahaku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

i-kahaku.jp accessibility score

80

Accessibility Issues

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

Definition list items are not wrapped in <dl> elements

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

i-kahaku.jp best practices score

75

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

High

Browser errors were logged to the console

SEO Factors

i-kahaku.jp SEO score

90

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise I-kahaku.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 I-kahaku.jp main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

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