Tools & Wizards About Us
j-sla.or.jp screenshot

Report Summary

  • 80

    Performance

    Renders faster than
    86% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

j-sla.or.jp

全国学校図書館協議会（全国SLA）｜全国学校図書館協議会

Page Load Speed

14.4 sec in total

First Response

4.5 sec

Resources Loaded

9.5 sec

Page Rendered

346 ms

j-sla.or.jp screenshot

About Website

Visit j-sla.or.jp now to see the best up-to-date J Sla content for Japan and also check out these interesting facts you probably never knew about j-sla.or.jp

学校図書館の充実・発展と青少年の読書振興を目的とした公益社団法人です。読書感想文、図書館の情報、推薦図書など、図書館司書の方が必要な図書館の情報をお届けします。

Visit j-sla.or.jp

Key Findings

We analyzed J-sla.or.jp page load time and found that the first response time was 4.5 sec and then it took 9.9 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

j-sla.or.jp performance score

80

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

48/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

72/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.038

100/100

15%

TTI (Time to Interactive)

Value4.2 s

86/100

10%

Network Requests Diagram

j-sla.or.jp

4528 ms

import.css

342 ms

home.css

548 ms

ki201603.jpg

2129 ms

sokuho_ban.jpg

613 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that all of those requests were addressed to J-sla.or.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (5.2 sec) belongs to the original domain J-sla.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 50.4 kB (4%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • CSS

In fact, the total size of J-sla.or.jp main page is 1.3 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. 20% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 15.1 kB

  • Original 19.0 kB
  • After minification 13.5 kB
  • After compression 3.9 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 5.5 kB, which is 29% 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 15.1 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 24.7 kB

  • Original 1.3 MB
  • After minification 1.2 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. J Sla images are well optimized though.

CSS Optimization

-78%

Potential reduce by 10.5 kB

  • Original 13.4 kB
  • After minification 10.3 kB
  • After compression 2.9 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. J-sla.or.jp needs all CSS files to be minified and compressed as it can save up to 10.5 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (20%)

Requests Now

59

After Optimization

47

  • Images
  • CSS

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J Sla. 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 CSS and as a result speed up the page load time.

Network Requests Diagram

j-sla.or.jp

j-sla.or.jp

4528 ms

import.css

import.css

342 ms

home.css

home.css

548 ms

ki201603.jpg

ki201603.jpg

2129 ms

sokuho_ban.jpg

sokuho_ban.jpg

613 ms

btn_naiyo.gif

btn_naiyo.gif

477 ms

l_kikanshi_btn.gif

l_kikanshi_btn.gif

762 ms

kikansi_goannai.gif

kikansi_goannai.gif

525 ms

l_btn1.gif

l_btn1.gif

461 ms

mail-magazine_home-bnr.gif

mail-magazine_home-bnr.gif

757 ms

l_btn2.gif

l_btn2.gif

615 ms

l_btn3.gif

l_btn3.gif

633 ms

l_member_btn.gif

l_member_btn.gif

693 ms

sla_no_hon2011.gif

sla_no_hon2011.gif

1066 ms

2016.gif

2016.gif

3668 ms

9784793300929.jpg

9784793300929.jpg

5150 ms

9784793300912.jpg

9784793300912.jpg

3183 ms

9784793321566.jpg

9784793321566.jpg

3533 ms

btn_event.gif

btn_event.gif

618 ms

btn_shinkan.gif

btn_shinkan.gif

640 ms

tsu201603-a.jpg

tsu201603-a.jpg

3229 ms

tsu201603-b.jpg

tsu201603-b.jpg

2782 ms

tsu201603-c.jpg

tsu201603-c.jpg

3244 ms

tsu201603-d.jpg

tsu201603-d.jpg

3514 ms

pagetop.gif

pagetop.gif

708 ms

search_btn.gif

search_btn.gif

783 ms

bnr_2.gif

bnr_2.gif

936 ms

bnr_3.gif

bnr_3.gif

768 ms

bnr_4.gif

bnr_4.gif

952 ms

bnr_koyomi.gif

bnr_koyomi.gif

1214 ms

yoiehon_bnr.gif

yoiehon_bnr.gif

923 ms

bnr_5.gif

bnr_5.gif

1145 ms

bnr_iasl.jpg

bnr_iasl.jpg

1064 ms

bnr-genki_project.gif

bnr-genki_project.gif

1077 ms

bnr-kifu.gif

bnr-kifu.gif

1268 ms

common.css

common.css

1084 ms

layout.css

layout.css

1189 ms

bg.gif

bg.gif

1552 ms

header_bg.gif

header_bg.gif

184 ms

main_bg.gif

main_bg.gif

172 ms

header.gif

header.gif

637 ms

menu_bg.gif

menu_bg.gif

155 ms

menu_btn.gif

menu_btn.gif

375 ms

bg_kikanshi.gif

bg_kikanshi.gif

309 ms

tit_kikanshi.gif

tit_kikanshi.gif

340 ms

bg_kikanshi_btm.gif

bg_kikanshi_btm.gif

364 ms

l_member_bg.gif

l_member_bg.gif

460 ms

title_slanews.gif

title_slanews.gif

511 ms

list_arrow.gif

list_arrow.gif

547 ms

title_oshirase.gif

title_oshirase.gif

541 ms

title_workshop.gif

title_workshop.gif

613 ms

title_concour.gif

title_concour.gif

679 ms

shinkan_bg.gif

shinkan_bg.gif

708 ms

shinkan_list_bg.gif

shinkan_list_bg.gif

729 ms

shinkan_bottom.gif

shinkan_bottom.gif

766 ms

search_bg.gif

search_bg.gif

793 ms

tsushin_bg.gif

tsushin_bg.gif

850 ms

right_tshushin_subtitle.gif

right_tshushin_subtitle.gif

875 ms

tsushin_bottom.gif

tsushin_bottom.gif

911 ms

main_btm.gif

main_btm.gif

1070 ms

Accessibility Review

j-sla.or.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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

Best Practices

j-sla.or.jp best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

j-sla.or.jp SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

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 J-sla.or.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 J-sla.or.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

j-sla.or.jp

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