Tools & Wizards About Us

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 89

    SEO

    Google-friendlier than
    66% of websites

historychannel.co.jp

日本・世界の歴史＆エンタメ | THE HISTORY CHANNEL JAPAN　ヒストリーチャンネル

Page Load Speed

5.2 sec in total

First Response

578 ms

Resources Loaded

4.3 sec

Page Rendered

310 ms

About Website

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

ヒストリーチャンネルは、上質な番組を放送する世界最大で日本唯一の歴史＆エンターテインメント専門チャンネルです。

Visit historychannel.co.jp

Key Findings

We analyzed Historychannel.co.jp page load time and found that the first response time was 578 ms and then it took 4.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

historychannel.co.jp performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value41.8 s

0/100

25%

SI (Speed Index)

Value13.5 s

2/100

10%

TBT (Total Blocking Time)

Value520 ms

56/100

30%

CLS (Cumulative Layout Shift)

Value0.084

93/100

15%

TTI (Time to Interactive)

Value23.6 s

1/100

10%

Network Requests Diagram

historychannel.co.jp

578 ms

www.historychannel.co.jp

783 ms

common.css

465 ms

ga.js

344 ms

lib.js

903 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 89% of them (72 requests) were addressed to the original Historychannel.co.jp, 2% (2 requests) were made to Google-analytics.com and 2% (2 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Historychannel.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 235.3 kB (15%)

Content Size

1.6 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Historychannel.co.jp main page is 1.6 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. 40% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 27.6 kB

  • Original 35.3 kB
  • After minification 30.0 kB
  • After compression 7.7 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 5.3 kB, which is 15% 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 27.6 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 53.9 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. HISTORY CHANNEL images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 133.9 kB

  • Original 234.1 kB
  • After minification 231.4 kB
  • After compression 100.3 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 133.9 kB or 57% of the original size.

CSS Optimization

-84%

Potential reduce by 19.9 kB

  • Original 23.8 kB
  • After minification 18.0 kB
  • After compression 3.9 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. Historychannel.co.jp needs all CSS files to be minified and compressed as it can save up to 19.9 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (33%)

Requests Now

76

After Optimization

51

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of HISTORY CHANNEL. 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 as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

historychannel.co.jp accessibility score

90

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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.

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

Links do not have a discernible name

Best Practices

historychannel.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

High

Browser errors were logged to the console

SEO Factors

historychannel.co.jp SEO score

89

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

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

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Historychannel.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Historychannel.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

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