Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

tohan.jp

株式会社トーハン

Page Load Speed

4.8 sec in total

First Response

1.1 sec

Resources Loaded

3.5 sec

Page Rendered

225 ms

tohan.jp screenshot

About Website

Visit tohan.jp now to see the best up-to-date Tohan content for Japan and also check out these interesting facts you probably never knew about tohan.jp

株式会社トーハンの公式WEBサイトです。トーハンは出版社と書店、読者を結ぶ出版流通ネットワークを構築しています。

Visit tohan.jp

Key Findings

We analyzed Tohan.jp page load time and found that the first response time was 1.1 sec and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

tohan.jp performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value690 ms

43/100

30%

CLS (Cumulative Layout Shift)

Value0.596

11/100

15%

TTI (Time to Interactive)

Value7.1 s

52/100

10%

Network Requests Diagram

tohan.jp

1055 ms

layout.css

682 ms

contents.css

866 ms

top.css

522 ms

jquery.js

1301 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 90% of them (54 requests) were addressed to the original Tohan.jp, 5% (3 requests) were made to Shutto.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Tohan.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 265.3 kB (28%)

Content Size

956.7 kB

After Optimization

691.3 kB

In fact, the total size of Tohan.jp main page is 956.7 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. 30% of websites need less resources to load. Images take 657.8 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 25.7 kB

  • Original 31.6 kB
  • After minification 25.4 kB
  • After compression 6.0 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 6.3 kB, which is 20% 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 25.7 kB or 81% of the original size.

Image Optimization

-7%

Potential reduce by 49.2 kB

  • Original 657.8 kB
  • After minification 608.6 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. Tohan images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 119.0 kB

  • Original 181.7 kB
  • After minification 174.6 kB
  • After compression 62.7 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 119.0 kB or 66% of the original size.

CSS Optimization

-84%

Potential reduce by 71.5 kB

  • Original 85.5 kB
  • After minification 64.8 kB
  • After compression 14.1 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. Tohan.jp needs all CSS files to be minified and compressed as it can save up to 71.5 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (14%)

Requests Now

58

After Optimization

50

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tohan. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

tohan.jp accessibility score

95

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

<frame> or <iframe> elements do not have a title

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

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.

Best Practices

tohan.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

SEO Factors

tohan.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 Tohan.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 Tohan.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 Tohan. 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: