Tools & Wizards About Us
concertsquare.jp screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

concertsquare.jp

コンサートスクウェア（クラシック音楽情報）

Page Load Speed

10.6 sec in total

First Response

565 ms

Resources Loaded

7.9 sec

Page Rendered

2.1 sec

concertsquare.jp screenshot

About Website

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

お得な無料やご招待チケットから一流演奏家まで、地域・ジャンル別で様々なクラシックコンサートを検索できる、コンサートスクウェアというサイトです。

Visit concertsquare.jp

Key Findings

We analyzed Concertsquare.jp page load time and found that the first response time was 565 ms and then it took 10 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

concertsquare.jp performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.3 s

3/100

10%

LCP (Largest Contentful Paint)

Value16.3 s

0/100

25%

SI (Speed Index)

Value11.6 s

4/100

10%

TBT (Total Blocking Time)

Value1,650 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value18.9 s

3/100

10%

Network Requests Diagram

concertsquare.jp

565 ms

concertsquare.jp

755 ms

www.concertsquare.jp

2165 ms

gtm.js

80 ms

css2

65 ms

Our browser made a total of 150 requests to load all elements on the main page. We found that 53% of them (80 requests) were addressed to the original Concertsquare.jp, 10% (15 requests) were made to Storage.googleapis.com and 9% (13 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (2.5 sec) relates to the external source Storage.googleapis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (19%)

Content Size

6.7 MB

After Optimization

5.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Concertsquare.jp main page is 6.7 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 5.7 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 165.8 kB

  • Original 184.8 kB
  • After minification 118.0 kB
  • After compression 19.1 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. This page needs HTML code to be minified as it can gain 66.9 kB, which is 36% 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 165.8 kB or 90% of the original size.

Image Optimization

-16%

Potential reduce by 934.1 kB

  • Original 5.7 MB
  • After minification 4.8 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. Obviously, Concertsquare needs image optimization as it can save up to 934.1 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-25%

Potential reduce by 183.3 kB

  • Original 721.4 kB
  • After minification 721.4 kB
  • After compression 538.2 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 183.3 kB or 25% of the original size.

CSS Optimization

-27%

Potential reduce by 16.4 kB

  • Original 60.2 kB
  • After minification 60.2 kB
  • After compression 43.8 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. Concertsquare.jp needs all CSS files to be minified and compressed as it can save up to 16.4 kB or 27% of the original size.

Requests Breakdown

Number of requests can be reduced by 48 (35%)

Requests Now

139

After Optimization

91

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 139 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Concertsquare. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

concertsquare.jp

concertsquare.jp

565 ms

concertsquare.jp

concertsquare.jp

755 ms

www.concertsquare.jp

www.concertsquare.jp

2165 ms

gtm.js

gtm.js

80 ms

css2

css2

65 ms

font-awesome.min.css

font-awesome.min.css

62 ms

bootstrap.min.css

bootstrap.min.css

53 ms

swiper.min.css

swiper.min.css

74 ms

style.css

style.css

422 ms

adsbygoogle.js

adsbygoogle.js

142 ms

jquery.min.js

jquery.min.js

50 ms

swiper.min.js

swiper.min.js

101 ms

custom.js

custom.js

577 ms

slider.js

slider.js

629 ms

area.js

area.js

709 ms

calendar.js

calendar.js

812 ms

js

js

72 ms

slotcar_library.js

slotcar_library.js

121 ms

show_ads_impl.js

show_ads_impl.js

527 ms

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1498 ms

logo.svg

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336 ms

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516 ms

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icon_support_border.svg

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334 ms

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42 ms

PAJJhLM6sSoWKfWCAAwDAjgbRAAB42mNgYGBkAIIbCZo5IPrmUn0hGA0AO8EFTQAA

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20 ms

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49 ms

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178 ms

ads

ads

461 ms

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1583 ms

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1694 ms

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337 ms

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1716 ms

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117 ms

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831 ms

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493 ms

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1137 ms

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1527 ms

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1812 ms

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1813 ms

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1881 ms

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1710 ms

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1888 ms

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1756 ms

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947 ms

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1716 ms

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940 ms

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1133 ms

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1505 ms

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1619 ms

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1797 ms

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1988 ms

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1864 ms

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1874 ms

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205 ms

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102 ms

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105 ms

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s

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36 ms

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100 ms

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135 ms

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36 ms

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231 ms

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34 ms

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939 ms

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1711 ms

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1747 ms

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1776 ms

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42 ms

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48 ms

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38 ms

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19 ms

activeview

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122 ms

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1437 ms

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9 ms

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118 ms

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15 ms

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activeview

160 ms

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1353 ms

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font

69 ms

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font

69 ms

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1358 ms

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1364 ms

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1370 ms

Accessibility Review

concertsquare.jp accessibility score

69

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

concertsquare.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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

concertsquare.jp SEO score

77

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

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 Concertsquare.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 Concertsquare.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

concertsquare.jp

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