Report Summary

  • 26

    Performance

    Renders faster than
    46% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    86% of websites

  • 92

    SEO

    Google-friendlier than
    79% of websites

vitamin-i.jp

株式会社ビタミンiファクトリー

Page Load Speed

5.1 sec in total

First Response

761 ms

Resources Loaded

4.2 sec

Page Rendered

156 ms

vitamin-i.jp screenshot

About Website

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

ドキドキを、成長のちからに。ビタミンiファクトリーは、「へんしんバイク」や「自転車教室」などを通して、夢を叶えられる大人へ、社会へ変えていきます。

Visit vitamin-i.jp

Key Findings

We analyzed Vitamin-i.jp page load time and found that the first response time was 761 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

vitamin-i.jp performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value14.6 s

0/100

25%

SI (Speed Index)

Value11.9 s

4/100

10%

TBT (Total Blocking Time)

Value460 ms

62/100

30%

CLS (Cumulative Layout Shift)

Value0.411

24/100

15%

TTI (Time to Interactive)

Value10.2 s

25/100

10%

Network Requests Diagram

vitamin-i.jp

761 ms

index.css

343 ms

smartRollover.js

344 ms

scrollsmoothly.js

519 ms

jquery.js

1217 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 91% of them (31 requests) were addressed to the original Vitamin-i.jp, 3% (1 request) were made to J1.ax.xrea.com and 3% (1 request) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Vitamin-i.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 112.1 kB (7%)

Content Size

1.5 MB

After Optimization

1.4 MB

In fact, the total size of Vitamin-i.jp main page is 1.5 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. 25% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 6.2 kB

  • Original 9.0 kB
  • After minification 7.2 kB
  • After compression 2.9 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 1.9 kB, which is 21% 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 6.2 kB or 68% of the original size.

Image Optimization

-0%

Potential reduce by 3.8 kB

  • Original 1.3 MB
  • After minification 1.3 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. Vitamin I images are well optimized though.

JavaScript Optimization

-56%

Potential reduce by 61.0 kB

  • Original 109.8 kB
  • After minification 106.7 kB
  • After compression 48.7 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 61.0 kB or 56% of the original size.

CSS Optimization

-88%

Potential reduce by 41.0 kB

  • Original 46.7 kB
  • After minification 36.8 kB
  • After compression 5.7 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. Vitamin-i.jp needs all CSS files to be minified and compressed as it can save up to 41.0 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (31%)

Requests Now

32

After Optimization

22

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vitamin I. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

vitamin-i.jp accessibility score

77

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

vitamin-i.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

vitamin-i.jp SEO score

92

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 doesn't use 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 Vitamin-i.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 Vitamin-i.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 Vitamin I. 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: