Report Summary

  • 15

    Performance

    Renders faster than
    34% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    47% of websites

  • 75

    SEO

    Google-friendlier than
    41% of websites

j-bus.co.jp

高速バス・夜行/深夜バスの予約なら - 発車オ~ライネット

Page Load Speed

14.5 sec in total

First Response

522 ms

Resources Loaded

13.6 sec

Page Rendered

405 ms

j-bus.co.jp screenshot

About Website

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

東京、大阪、名古屋発着をはじめ、全国400路線以上から選べる高速バス・夜行バスの予約サイト【発車オ~ライネット】。ディズニーやUSJ、空港バス、観光コース等プランも充実!コンビニ発券・クレジット決済、モバイルチケットでバス予約がとても簡単!

Visit j-bus.co.jp

Key Findings

We analyzed J-bus.co.jp page load time and found that the first response time was 522 ms and then it took 14 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-bus.co.jp performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value16.4 s

0/100

10%

TBT (Total Blocking Time)

Value17,830 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value32.4 s

0/100

10%

Network Requests Diagram

j-bus.co.jp

522 ms

hon

4747 ms

Set.css

490 ms

Common.css

868 ms

jquery.dropdown.css

537 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original J-bus.co.jp, 86% (62 requests) were made to Secure.j-bus.co.jp and 6% (4 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (5.3 sec) relates to the external source Secure.j-bus.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 407.2 kB (68%)

Content Size

601.1 kB

After Optimization

194.0 kB

In fact, the total size of J-bus.co.jp main page is 601.1 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. 20% of websites need less resources to load. Javascripts take 419.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 32.2 kB

  • Original 40.8 kB
  • After minification 35.2 kB
  • After compression 8.5 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 5.6 kB, which is 14% 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 32.2 kB or 79% of the original size.

Image Optimization

-42%

Potential reduce by 45.1 kB

  • Original 108.4 kB
  • After minification 63.4 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. Obviously, J Bus needs image optimization as it can save up to 45.1 kB or 42% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-72%

Potential reduce by 302.9 kB

  • Original 419.6 kB
  • After minification 366.6 kB
  • After compression 116.8 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 302.9 kB or 72% of the original size.

CSS Optimization

-83%

Potential reduce by 27.0 kB

  • Original 32.3 kB
  • After minification 21.5 kB
  • After compression 5.3 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-bus.co.jp needs all CSS files to be minified and compressed as it can save up to 27.0 kB or 83% of the original size.

Requests Breakdown

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

Requests Now

70

After Optimization

49

The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J Bus. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

j-bus.co.jp accessibility score

70

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-*] attributes do not match their roles

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

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

j-bus.co.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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

j-bus.co.jp SEO score

75

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 doesn't use 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 J-bus.co.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-bus.co.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 J Bus. 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: