Tools & Wizards About Us

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

naui.co.jp

ダイビングライセンス（Cカード）取得、スクールはNAUI

Page Load Speed

7.7 sec in total

First Response

631 ms

Resources Loaded

6.1 sec

Page Rendered

967 ms

About Website

Click here to check amazing Naui content for Japan. Otherwise, check out these important facts you probably never knew about naui.co.jp

NAUIは、「最愛の人を任せられる信頼」をテーマにダイビングを提供しています。ダイビングスクール、Cカード(通称：ダイビングライセンス）取得は、お任せください！

Visit naui.co.jp

Key Findings

We analyzed Naui.co.jp page load time and found that the first response time was 631 ms and then it took 7.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

naui.co.jp performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value8.8 s

1/100

25%

SI (Speed Index)

Value7.8 s

24/100

10%

TBT (Total Blocking Time)

Value290 ms

80/100

30%

CLS (Cumulative Layout Shift)

Value0.146

77/100

15%

TTI (Time to Interactive)

Value8.2 s

41/100

10%

Network Requests Diagram

naui.co.jp

631 ms

naui.co.jp

1268 ms

reset.css

491 ms

base.css

527 ms

baseMedia.css

561 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 92% of them (54 requests) were addressed to the original Naui.co.jp, 3% (2 requests) were made to Fonts.googleapis.com and 3% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (3.7 sec) belongs to the original domain Naui.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 495.5 kB (6%)

Content Size

8.7 MB

After Optimization

8.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Naui.co.jp main page is 8.7 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. 45% of websites need less resources to load. Images take 8.4 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 42.3 kB

  • Original 48.5 kB
  • After minification 32.0 kB
  • After compression 6.2 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 16.5 kB, which is 34% 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 42.3 kB or 87% of the original size.

Image Optimization

-4%

Potential reduce by 303.3 kB

  • Original 8.4 MB
  • After minification 8.1 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. Naui images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 94.5 kB

  • Original 137.8 kB
  • After minification 136.4 kB
  • After compression 43.3 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 94.5 kB or 69% of the original size.

CSS Optimization

-79%

Potential reduce by 55.3 kB

  • Original 70.0 kB
  • After minification 59.2 kB
  • After compression 14.7 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. Naui.co.jp needs all CSS files to be minified and compressed as it can save up to 55.3 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (27%)

Requests Now

52

After Optimization

38

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Naui. 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 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

naui.co.jp accessibility score

94

Accessibility Issues

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

naui.co.jp best practices score

83

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

SEO Factors

naui.co.jp SEO score

100

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

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Naui.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 Naui.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 data is detected on the main page of Naui. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: