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jaco.co.jp screenshot

Report Summary

  • 73

    Performance

    Renders faster than
    83% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

jaco.co.jp

総合認証機関JACO 株式会社日本環境認証機構 認証サイト

Page Load Speed

4.1 sec in total

First Response

726 ms

Resources Loaded

3.2 sec

Page Rendered

164 ms

jaco.co.jp screenshot

About Website

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

安全・安心な社会づくりに「認証」で貢献します。 これから認証取得をお考えのお客様はこちら 新規認証取得のお客様

Visit jaco.co.jp

Key Findings

We analyzed Jaco.co.jp page load time and found that the first response time was 726 ms and then it took 3.4 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

jaco.co.jp performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value210 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.3 s

85/100

10%

Network Requests Diagram

jaco.co.jp

726 ms

common.css

331 ms

base.css

332 ms

top.css

346 ms

rollover.js

350 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that all of those requests were addressed to Jaco.co.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Jaco.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 128.6 kB (44%)

Content Size

294.4 kB

After Optimization

165.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jaco.co.jp main page is 294.4 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. 25% of websites need less resources to load. Images take 120.4 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 14.7 kB

  • Original 19.8 kB
  • After minification 18.1 kB
  • After compression 5.1 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 14.7 kB or 74% of the original size.

Image Optimization

-2%

Potential reduce by 2.7 kB

  • Original 120.4 kB
  • After minification 117.8 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. Jaco images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 68.0 kB

  • Original 103.7 kB
  • After minification 101.1 kB
  • After compression 35.8 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 68.0 kB or 66% of the original size.

CSS Optimization

-86%

Potential reduce by 43.3 kB

  • Original 50.4 kB
  • After minification 28.9 kB
  • After compression 7.1 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. Jaco.co.jp needs all CSS files to be minified and compressed as it can save up to 43.3 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (16%)

Requests Now

62

After Optimization

52

  • Images
  • JavaScript
  • CSS

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jaco. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jaco.co.jp

jaco.co.jp

726 ms

common.css

common.css

331 ms

base.css

base.css

332 ms

top.css

top.css

346 ms

rollover.js

rollover.js

350 ms

clickrollover.js

clickrollover.js

354 ms

jquery-1.7.2.min.js

jquery-1.7.2.min.js

931 ms

inlinebg.js

inlinebg.js

493 ms

jquery.imageNavigation.js

jquery.imageNavigation.js

494 ms

default.css

default.css

190 ms

common_layout.css

common_layout.css

374 ms

class.css

class.css

201 ms

120515trans.css

120515trans.css

328 ms

header_bg.jpg

header_bg.jpg

178 ms

header_logo.gif

header_logo.gif

166 ms

header_txt.gif

header_txt.gif

174 ms

header_inq.gif

header_inq.gif

166 ms

btn_search.gif

btn_search.gif

178 ms

gnavi_01_ov.gif

gnavi_01_ov.gif

188 ms

gnavi_02.gif

gnavi_02.gif

329 ms

gnavi_03.gif

gnavi_03.gif

330 ms

gnavi_04.gif

gnavi_04.gif

347 ms

gnavi_05.gif

gnavi_05.gif

353 ms

top_mainimg_btn_01.gif

top_mainimg_btn_01.gif

353 ms

top_mainimg_btn_02.gif

top_mainimg_btn_02.gif

373 ms

top_mainimg_btn_03.gif

top_mainimg_btn_03.gif

493 ms

top_mainimg_btn_04.gif

top_mainimg_btn_04.gif

493 ms

top_mainimg_01.jpg

top_mainimg_01.jpg

691 ms

top_mainimg_02.jpg

top_mainimg_02.jpg

705 ms

top_mainimg_03.jpg

top_mainimg_03.jpg

706 ms

top_mainimg_04.jpg

top_mainimg_04.jpg

560 ms

top_service_h.gif

top_service_h.gif

657 ms

top_info_h.gif

top_info_h.gif

656 ms

green_dotoline_346.gif

green_dotoline_346.gif

746 ms

top_topics_h.gif

top_topics_h.gif

820 ms

top_link_h.gif

top_link_h.gif

821 ms

top_rgt_btn_01.gif

top_rgt_btn_01.gif

863 ms

top_rgt_btn_03.gif

top_rgt_btn_03.gif

881 ms

arrow01.gif

arrow01.gif

882 ms

top_btm_btn_01.gif

top_btm_btn_01.gif

932 ms

top_btm_btn_02.gif

top_btm_btn_02.gif

984 ms

top_btm_btn_03.gif

top_btm_btn_03.gif

984 ms

top_btm_btn_04.gif

top_btm_btn_04.gif

1035 ms

top_btm_btn_05.gif

top_btm_btn_05.gif

1057 ms

topagetop.gif

topagetop.gif

1058 ms

footer_bg.gif

footer_bg.gif

1121 ms

copyright.gif

copyright.gif

1147 ms

arrow02.gif

arrow02.gif

1148 ms

top_mainimg_btn_01_on.gif

top_mainimg_btn_01_on.gif

1207 ms

top_mainimg_btn_02_on.gif

top_mainimg_btn_02_on.gif

1074 ms

top_mainimg_btn_03_on.gif

top_mainimg_btn_03_on.gif

1075 ms

top_mainimg_btn_04_on.gif

top_mainimg_btn_04_on.gif

1141 ms

gnavi_02_ov.gif

gnavi_02_ov.gif

179 ms

gnavi_03_ov.gif

gnavi_03_ov.gif

166 ms

gnavi_04_ov.gif

gnavi_04_ov.gif

174 ms

gnavi_05_ov.gif

gnavi_05_ov.gif

166 ms

top_rgt_btn_01_ov.gif

top_rgt_btn_01_ov.gif

178 ms

top_rgt_btn_03_ov.gif

top_rgt_btn_03_ov.gif

188 ms

top_btm_btn_01_ov.gif

top_btm_btn_01_ov.gif

329 ms

top_btm_btn_02_ov.gif

top_btm_btn_02_ov.gif

330 ms

top_btm_btn_03_ov.gif

top_btm_btn_03_ov.gif

347 ms

top_btm_btn_04_ov.gif

top_btm_btn_04_ov.gif

354 ms

top_btm_btn_05_ov.gif

top_btm_btn_05_ov.gif

354 ms

Accessibility Review

jaco.co.jp accessibility score

72

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Best Practices

jaco.co.jp best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

jaco.co.jp SEO score

71

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

    JA

  • Encoding

    SHIFT_JIS

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

jaco.co.jp

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