Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

metrocf.or.jp

公益財団法人メトロ文化財団

Page Load Speed

9.2 sec in total

First Response

1.1 sec

Resources Loaded

7.7 sec

Page Rendered

420 ms

metrocf.or.jp screenshot

About Website

Visit metrocf.or.jp now to see the best up-to-date Metrocf content and also check out these interesting facts you probably never knew about metrocf.or.jp

メトロ文化財団は、地下鉄博物館事業の運営を中心に、地下鉄を中心とする交通文化の普及と醸成を図るための事業、地下鉄利用者等に対する交通マナーの高揚を図るための事業等を推進し、東京メトログループにおける社会貢献活動の一翼を担う企業財団として、東京メトロの旅客及び一般公衆を対象とする鉄道事業に関係する公益事業の充実に努めております。

Visit metrocf.or.jp

Key Findings

We analyzed Metrocf.or.jp page load time and found that the first response time was 1.1 sec and then it took 8.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

metrocf.or.jp performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

8/100

10%

LCP (Largest Contentful Paint)

Value11.9 s

0/100

25%

SI (Speed Index)

Value17.8 s

0/100

10%

TBT (Total Blocking Time)

Value990 ms

28/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value21.0 s

1/100

10%

Network Requests Diagram

metrocf.or.jp

1061 ms

common.css

920 ms

lightbox.css

441 ms

index.css

596 ms

common.js

964 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 97% of them (69 requests) were addressed to the original Metrocf.or.jp, 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (5.8 sec) belongs to the original domain Metrocf.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 249.8 kB (11%)

Content Size

2.4 MB

After Optimization

2.1 MB

In fact, the total size of Metrocf.or.jp main page is 2.4 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 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 13.6 kB

  • Original 18.4 kB
  • After minification 16.5 kB
  • After compression 4.7 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. 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 13.6 kB or 74% of the original size.

Image Optimization

-4%

Potential reduce by 78.9 kB

  • Original 2.1 MB
  • After minification 2.1 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. Metrocf images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 122.6 kB

  • Original 183.3 kB
  • After minification 177.2 kB
  • After compression 60.7 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 122.6 kB or 67% of the original size.

CSS Optimization

-83%

Potential reduce by 34.7 kB

  • Original 41.6 kB
  • After minification 29.2 kB
  • After compression 7.0 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. Metrocf.or.jp needs all CSS files to be minified and compressed as it can save up to 34.7 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (9%)

Requests Now

70

After Optimization

64

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

Accessibility Review

metrocf.or.jp accessibility score

86

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.

Best Practices

metrocf.or.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

High

Page has valid source maps

SEO Factors

metrocf.or.jp SEO score

82

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

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Metrocf.or.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 Metrocf.or.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 Metrocf. 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: