Tools & Wizards About Us
seiritsu.ac.jp screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 81% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

seiritsu.ac.jp

成立学園中学・高等学校

Page Load Speed

5.8 sec in total

First Response

609 ms

Resources Loaded

4.3 sec

Page Rendered

896 ms

seiritsu.ac.jp screenshot

About Website

Welcome to seiritsu.ac.jp homepage info - get ready to check Seiritsu best content for Japan right away, or after learning these important things about seiritsu.ac.jp

東京都北区にある成立学園中学・高等学校は将来の目標を具体的に達成する「見える学力」と、幅広い教養を身につけ”発信力”を育成する「見えない学力」を共に育て、生涯学び続けるための足腰を自ら鍛える力を養います。

Visit seiritsu.ac.jp

Key Findings

We analyzed Seiritsu.ac.jp page load time and found that the first response time was 609 ms and then it took 5.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

seiritsu.ac.jp performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

11/100

10%

LCP (Largest Contentful Paint)

Value25.6 s

0/100

25%

SI (Speed Index)

Value9.4 s

12/100

10%

TBT (Total Blocking Time)

Value1,430 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.016

100/100

15%

TTI (Time to Interactive)

Value17.4 s

4/100

10%

Network Requests Diagram

seiritsu.ac.jp

609 ms

seiritsu.ac.jp

856 ms

gtm.js

67 ms

css2

34 ms

css2

53 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 73% of them (36 requests) were addressed to the original Seiritsu.ac.jp, 12% (6 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Seiritsu.ac.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 762.8 kB (10%)

Content Size

7.8 MB

After Optimization

7.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Seiritsu.ac.jp main page is 7.8 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. Only a small number of websites need less resources to load. Images take 7.5 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 66.7 kB

  • Original 74.8 kB
  • After minification 52.9 kB
  • After compression 8.1 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 21.9 kB, which is 29% 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 66.7 kB or 89% of the original size.

Image Optimization

-9%

Potential reduce by 695.8 kB

  • Original 7.5 MB
  • After minification 6.8 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. Seiritsu images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 74 B

  • Original 98.0 kB
  • After minification 98.0 kB
  • After compression 97.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 203 B

  • Original 67.4 kB
  • After minification 67.4 kB
  • After compression 67.2 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. Seiritsu.ac.jp has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 8 (20%)

Requests Now

40

After Optimization

32

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Seiritsu. 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 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

seiritsu.ac.jp

seiritsu.ac.jp

609 ms

seiritsu.ac.jp

seiritsu.ac.jp

856 ms

gtm.js

gtm.js

67 ms

css2

css2

34 ms

css2

css2

53 ms

swiper-bundle.min.css

swiper-bundle.min.css

236 ms

styles.css

styles.css

615 ms

logo.png

logo.png

579 ms

jquery.min.js

jquery.min.js

23 ms

swiper-bundle.min.js

swiper-bundle.min.js

784 ms

common.js

common.js

601 ms

mv_title.png

mv_title.png

1067 ms

topBanner.jpg

topBanner.jpg

1067 ms

topics_pic04.jpg

topics_pic04.jpg

1361 ms

topics_pic03.jpg

topics_pic03.jpg

1420 ms

topics_pic02.png

topics_pic02.png

824 ms

20240318_01.jpg

20240318_01.jpg

1561 ms

20240325_01.jpg

20240325_01.jpg

1863 ms

20240507_31.jpg

20240507_31.jpg

2265 ms

learn_content01_pic.png

learn_content01_pic.png

1671 ms

learn_content02_pic.png

learn_content02_pic.png

1735 ms

learn_content03_pic.png

learn_content03_pic.png

1820 ms

life_content01_pic.png

life_content01_pic.png

1749 ms

life_content02_pic.png

life_content02_pic.png

1865 ms

life_content03_pic.png

life_content03_pic.png

1926 ms

footer_bnr_01.jpg

footer_bnr_01.jpg

1949 ms

footer_bnr_04.png

footer_bnr_04.png

2030 ms

footer_bnr_02.png

footer_bnr_02.png

2046 ms

footer_bnr_03.png

footer_bnr_03.png

2067 ms

footer_bnr_05.png

footer_bnr_05.png

2130 ms

footer_bnr_06.png

footer_bnr_06.png

2152 ms

footer_bnr_07.png

footer_bnr_07.png

2237 ms

js

js

70 ms

analytics.js

analytics.js

18 ms

collect

collect

68 ms

mv.png

mv.png

1787 ms

sprite.png

sprite.png

1605 ms

learn_pic.png

learn_pic.png

1841 ms

Learning.png

Learning.png

1675 ms

life_pic.png

life_pic.png

2177 ms

SchoolLife.png

SchoolLife.png

1810 ms

sns-bg.png

sns-bg.png

2203 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj75s.ttf

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj75s.ttf

118 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFCMj75s.ttf

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFCMj75s.ttf

275 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFPYk75s.ttf

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFPYk75s.ttf

317 ms

icons.woff

icons.woff

1744 ms

8vIU7ww63mVu7gtR-kwKxNvkNOjw-jHgTYo.ttf

8vIU7ww63mVu7gtR-kwKxNvkNOjw-jHgTYo.ttf

194 ms

8vIU7ww63mVu7gtR-kwKxNvkNOjw-uTnTYo.ttf

8vIU7ww63mVu7gtR-kwKxNvkNOjw-uTnTYo.ttf

192 ms

8vIU7ww63mVu7gtR-kwKxNvkNOjw-tbnTYo.ttf

8vIU7ww63mVu7gtR-kwKxNvkNOjw-tbnTYo.ttf

193 ms

Accessibility Review

seiritsu.ac.jp accessibility score

93

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

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

seiritsu.ac.jp best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

Page has valid source maps

SEO Factors

seiritsu.ac.jp SEO score

91

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 Seiritsu.ac.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 Seiritsu.ac.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

seiritsu.ac.jp

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