Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

tohan.jp

株式会社トーハン

Page Load Speed

24.9 sec in total

First Response

1.1 sec

Resources Loaded

22.7 sec

Page Rendered

1.1 sec

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 23.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 13 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

tohan.jp performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value29.5 s

0/100

25%

SI (Speed Index)

Value13.0 s

2/100

10%

TBT (Total Blocking Time)

Value390 ms

69/100

30%

CLS (Cumulative Layout Shift)

Value0.158

74/100

15%

TTI (Time to Interactive)

Value11.8 s

17/100

10%

Network Requests Diagram

www.tohan.jp

1141 ms

js

62 ms

css2

28 ms

style.min.css

496 ms

default.css

337 ms

Our browser made a total of 89 requests to load all elements on the main page. We found that 61% of them (54 requests) were addressed to the original Tohan.jp, 27% (24 requests) were made to Www1.e-hon.ne.jp and 4% (4 requests) were made to Cdn.jsdelivr.net. The less responsive or slowest element that took the longest time to load (20.1 sec) relates to the external source Www1.e-hon.ne.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 321.8 kB (4%)

Content Size

8.1 MB

After Optimization

7.8 MB

In fact, the total size of Tohan.jp main page is 8.1 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 8.0 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 72.1 kB

  • Original 84.3 kB
  • After minification 76.5 kB
  • After compression 12.1 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 72.1 kB or 86% of the original size.

Image Optimization

-3%

Potential reduce by 238.3 kB

  • Original 8.0 MB
  • After minification 7.7 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. Tohan images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 561 B

  • Original 32.1 kB
  • After minification 32.1 kB
  • After compression 31.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-28%

Potential reduce by 10.8 kB

  • Original 38.8 kB
  • After minification 38.8 kB
  • After compression 28.0 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 10.8 kB or 28% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (30%)

Requests Now

69

After Optimization

48

The browser has sent 69 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 5 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

tohan.jp accessibility score

85

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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>).

Best Practices

tohan.jp best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

tohan.jp SEO score

91

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