Tools & Wizards About Us
kantei.go.jp screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    45% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

kantei.go.jp

首相官邸ホームページ

Page Load Speed

11.2 sec in total

First Response

13 ms

Resources Loaded

10.4 sec

Page Rendered

747 ms

kantei.go.jp screenshot

About Website

Click here to check amazing Kantei content for Japan. Otherwise, check out these important facts you probably never knew about kantei.go.jp

首相官邸のホームページです。内閣や総理大臣に関する情報をご覧になれます。

Visit kantei.go.jp

Key Findings

We analyzed Kantei.go.jp page load time and found that the first response time was 13 ms and then it took 11.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

kantei.go.jp performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value49.2 s

0/100

25%

SI (Speed Index)

Value17.1 s

0/100

10%

TBT (Total Blocking Time)

Value310 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0.756

6/100

15%

TTI (Time to Interactive)

Value46.6 s

0/100

10%

Network Requests Diagram

kantei.go.jp

13 ms

www.kantei.go.jp

758 ms

common_202204.css

757 ms

swiper.min_202204.css

791 ms

jquery-3.6.0.min_202204.js

768 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 87% of them (74 requests) were addressed to the original Kantei.go.jp, 2% (2 requests) were made to Platform.twitter.com and 2% (2 requests) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (4.5 sec) belongs to the original domain Kantei.go.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (9%)

Content Size

14.2 MB

After Optimization

12.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kantei.go.jp main page is 14.2 MB. 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 a small number of websites need less resources to load. Images take 13.5 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 49.6 kB

  • Original 62.4 kB
  • After minification 62.1 kB
  • After compression 12.9 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. 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 49.6 kB or 79% of the original size.

Image Optimization

-5%

Potential reduce by 729.8 kB

  • Original 13.5 MB
  • After minification 12.7 MB

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. Kantei images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 306.5 kB

  • Original 460.8 kB
  • After minification 458.7 kB
  • After compression 154.4 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 306.5 kB or 66% of the original size.

CSS Optimization

-84%

Potential reduce by 148.0 kB

  • Original 176.4 kB
  • After minification 175.4 kB
  • After compression 28.4 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. Kantei.go.jp needs all CSS files to be minified and compressed as it can save up to 148.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 27 (34%)

Requests Now

80

After Optimization

53

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kantei. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

kantei.go.jp

kantei.go.jp

13 ms

www.kantei.go.jp

www.kantei.go.jp

758 ms

common_202204.css

common_202204.css

757 ms

swiper.min_202204.css

swiper.min_202204.css

791 ms

jquery-3.6.0.min_202204.js

jquery-3.6.0.min_202204.js

768 ms

jquery.easing.min_202204.js

jquery.easing.min_202204.js

739 ms

swiper.min_202204.js

swiper.min_202204.js

738 ms

top_mv.js

top_mv.js

796 ms

common_202204.js

common_202204.js

1457 ms

loader.min.js

loader.min.js

108 ms

top_202204.css

top_202204.css

1471 ms

top_202204.js

top_202204.js

1586 ms

css2

css2

29 ms

widgets.js

widgets.js

95 ms

sdk.js

sdk.js

139 ms

r_icon_arrow.svg

r_icon_arrow.svg

712 ms

r_icon_close_black.svg

r_icon_close_black.svg

722 ms

20231102kaiken_06h_02.png

20231102kaiken_06h_02.png

754 ms

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20240503aisatsu1.jpg

756 ms

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20240503paraguai_1.jpg

726 ms

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801 ms

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1475 ms

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1448 ms

20240502speech_3.jpg

20240502speech_3.jpg

1455 ms

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1468 ms

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1483 ms

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1533 ms

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2168 ms

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2190 ms

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2202 ms

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2207 ms

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2209 ms

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2240 ms

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20240422digitalgyouzaisei_1.jpg

2899 ms

20240422hyoukei_1.jpg

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2903 ms

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2931 ms

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2922 ms

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2948 ms

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2965 ms

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3618 ms

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3619 ms

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3669 ms

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3650 ms

20240413message.jpg

20240413message.jpg

3663 ms

r_img_top_action_02.jpg

r_img_top_action_02.jpg

3678 ms

r_img_top_action_01.jpg

r_img_top_action_01.jpg

4334 ms

r_img_top_action_03.jpg

r_img_top_action_03.jpg

4334 ms

r_img_top_action_04.jpg

r_img_top_action_04.jpg

4366 ms

r_icon_arrow_white.svg

r_icon_arrow_white.svg

4385 ms

bi.js

bi.js

829 ms

top-main-visual.tpl

top-main-visual.tpl

4338 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj75s.ttf

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj75s.ttf

108 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFPYk75s.ttf

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFPYk75s.ttf

161 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

73 ms

r_icon_rss.svg

r_icon_rss.svg

4261 ms

sdk.js

sdk.js

16 ms

112 ms

settings

settings

119 ms

header_202204.tpl

header_202204.tpl

4348 ms

footer_202204.tpl

footer_202204.tpl

4365 ms

r_img_top_guide_pc2.png

r_img_top_guide_pc2.png

4375 ms

r_img_top_guide_sp.png

r_img_top_guide_sp.png

3861 ms

r_icon_noimage.svg

r_icon_noimage.svg

4459 ms

000143679.jpg

000143679.jpg

723 ms

000143680.jpg

000143680.jpg

912 ms

r_logo.png

r_logo.png

716 ms

icon_window.svg

icon_window.svg

711 ms

r_icon_x.svg

r_icon_x.svg

717 ms

r_icon_instagram_white.svg

r_icon_instagram_white.svg

786 ms

r_icon_youtube_white.svg

r_icon_youtube_white.svg

870 ms

r_icon_facebook_white.svg

r_icon_facebook_white.svg

986 ms

r_icon_line_white.svg

r_icon_line_white.svg

1432 ms

r_icon_plusmessage_white.png

r_icon_plusmessage_white.png

1447 ms

r_icon_global.svg

r_icon_global.svg

1433 ms

r_icon_discussion.svg

r_icon_discussion.svg

1518 ms

r_icon_search.svg

r_icon_search.svg

1591 ms

r_icon_discussion_white.svg

r_icon_discussion_white.svg

1730 ms

r_icon_arrow_circle_white.svg

r_icon_arrow_circle_white.svg

2137 ms

r_icon_x_basic.svg

r_icon_x_basic.svg

2147 ms

r_icon_instagram_basic.svg

r_icon_instagram_basic.svg

2157 ms

r_icon_youtube_basic.svg

r_icon_youtube_basic.svg

2318 ms

r_icon_facebook_basic.svg

r_icon_facebook_basic.svg

2295 ms

r_icon_line_basic_round.svg

r_icon_line_basic_round.svg

2431 ms

r_icon_message_basic_round.png

r_icon_message_basic_round.png

2995 ms

logo_jasrac.png

logo_jasrac.png

2872 ms

Accessibility Review

kantei.go.jp accessibility score

100

Accessibility Issues

Best Practices

kantei.go.jp best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

kantei.go.jp SEO score

98

Search Engine Optimization Advices

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

    JA

  • Encoding

    UTF-8

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

kantei.go.jp

Open Graph data is detected on the main page of Kantei. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: