Tools & Wizards About Us
zen-sk.co.jp screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

zen-sk.co.jp

善設計のホームページへようこそ｜東京都大田区仲池上2-19-11　お問い合わせ：03-3752-7801

Page Load Speed

4.2 sec in total

First Response

580 ms

Resources Loaded

3.5 sec

Page Rendered

113 ms

zen-sk.co.jp screenshot

About Website

Visit zen-sk.co.jp now to see the best up-to-date Zen Sk content and also check out these interesting facts you probably never knew about zen-sk.co.jp

東京都大田区で　構造設計、耐震診断、耐震設計、新築設計、Iインスペクション等を手がける設計事務所です。

Visit zen-sk.co.jp

Key Findings

We analyzed Zen-sk.co.jp page load time and found that the first response time was 580 ms and then it took 3.6 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

zen-sk.co.jp performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

63/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value750 ms

39/100

30%

CLS (Cumulative Layout Shift)

Value0.014

100/100

15%

TTI (Time to Interactive)

Value9.4 s

30/100

10%

Network Requests Diagram

zen-sk.co.jp

580 ms

zen-sk.co.jp

798 ms

mt.js

520 ms

on.js

204 ms

default.css

402 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 54% of them (30 requests) were addressed to the original Zen-sk.co.jp, 32% (18 requests) were made to Platform.twitter.com and 4% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (798 ms) belongs to the original domain Zen-sk.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 52.5 kB (21%)

Content Size

244.6 kB

After Optimization

192.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zen-sk.co.jp main page is 244.6 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. 45% of websites need less resources to load. Images take 157.4 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 15.3 kB

  • Original 20.2 kB
  • After minification 15.6 kB
  • After compression 4.9 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 4.7 kB, which is 23% 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 15.3 kB or 76% of the original size.

Image Optimization

-0%

Potential reduce by 65 B

  • Original 157.4 kB
  • After minification 157.3 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. Zen Sk images are well optimized though.

JavaScript Optimization

-55%

Potential reduce by 35.6 kB

  • Original 64.3 kB
  • After minification 64.3 kB
  • After compression 28.8 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 35.6 kB or 55% of the original size.

CSS Optimization

-57%

Potential reduce by 1.5 kB

  • Original 2.7 kB
  • After minification 2.4 kB
  • After compression 1.2 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. Zen-sk.co.jp needs all CSS files to be minified and compressed as it can save up to 1.5 kB or 57% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (54%)

Requests Now

48

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zen Sk. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zen-sk.co.jp

zen-sk.co.jp

580 ms

zen-sk.co.jp

zen-sk.co.jp

798 ms

mt.js

mt.js

520 ms

on.js

on.js

204 ms

default.css

default.css

402 ms

top.css

top.css

518 ms

base.js

base.js

517 ms

mt.js

mt.js

706 ms

gtm.js

gtm.js

76 ms

logo.gif

logo.gif

235 ms

20161217_140024-thumb-150xauto-249.jpg

20161217_140024-thumb-150xauto-249.jpg

232 ms

s-IMG_5613-thumb-150xauto-242.jpg

s-IMG_5613-thumb-150xauto-242.jpg

440 ms

ut01-thumb-150xauto-222.jpg

ut01-thumb-150xauto-222.jpg

440 ms

001-DSCN9453-thumb-150xauto-198.jpg

001-DSCN9453-thumb-150xauto-198.jpg

406 ms

zensekkei.gif

zensekkei.gif

236 ms

tel.gif

tel.gif

231 ms

stripe.gif

stripe.gif

235 ms

navi_off.gif

navi_off.gif

439 ms

navi_on.gif

navi_on.gif

406 ms

top_1.jpg

top_1.jpg

572 ms

top_2.jpg

top_2.jpg

588 ms

top_3.jpg

top_3.jpg

747 ms

information.gif

information.gif

641 ms

icon_3.gif

icon_3.gif

645 ms

topics.gif

topics.gif

635 ms

works.gif

works.gif

745 ms

button1.gif

button1.gif

764 ms

widgets.js

widgets.js

15 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

19 ms

settings

settings

161 ms

js

js

58 ms

analytics.js

analytics.js

17 ms

collect

collect

12 ms

collect

collect

91 ms

20161217_140024-thumb-150xauto-249.jpg

20161217_140024-thumb-150xauto-249.jpg

348 ms

timeline.e108540dddc96e4b707f5cf259a582d7.js

timeline.e108540dddc96e4b707f5cf259a582d7.js

3 ms

ga-audiences

ga-audiences

615 ms

zenskcojp1

zenskcojp1

68 ms

polyfills-a40ef1678bae11e696dba45124eadd70.js

polyfills-a40ef1678bae11e696dba45124eadd70.js

3 ms

runtime-b1c52fd0a13ead5fcf6b.js

runtime-b1c52fd0a13ead5fcf6b.js

22 ms

modules-96ebc7ac3ad66d681a3d.js

modules-96ebc7ac3ad66d681a3d.js

23 ms

main-babd9234dc048fb47339.js

main-babd9234dc048fb47339.js

21 ms

_app-a9c9f1a99e4414675fb1.js

_app-a9c9f1a99e4414675fb1.js

44 ms

%5BscreenName%5D-0517bdda27d5006a5a2d.js

%5BscreenName%5D-0517bdda27d5006a5a2d.js

47 ms

_buildManifest.js

_buildManifest.js

56 ms

_ssgManifest.js

_ssgManifest.js

57 ms

8526.0c32a8f0cfc5749221a3.js

8526.0c32a8f0cfc5749221a3.js

11 ms

1755.07a49c40b12af4f75780.js

1755.07a49c40b12af4f75780.js

10 ms

8283.f3e5048cca7cef5eed7f.js

8283.f3e5048cca7cef5eed7f.js

6 ms

3077.44bfeb00af01bc4020f6.js

3077.44bfeb00af01bc4020f6.js

8 ms

1362.42d432e02f7980bca032.js

1362.42d432e02f7980bca032.js

10 ms

4956.c4e51ef593974b9db0bb.js

4956.c4e51ef593974b9db0bb.js

23 ms

5893.d500bd2a89ded806aa73.js

5893.d500bd2a89ded806aa73.js

8 ms

001-DSCN9453-thumb-150xauto-198.jpg

001-DSCN9453-thumb-150xauto-198.jpg

346 ms

ut01-thumb-150xauto-222.jpg

ut01-thumb-150xauto-222.jpg

482 ms

s-IMG_5613-thumb-150xauto-242.jpg

s-IMG_5613-thumb-150xauto-242.jpg

488 ms

Accessibility Review

zen-sk.co.jp accessibility score

95

Accessibility Issues

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

Best Practices

zen-sk.co.jp best practices score

58

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

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zen-sk.co.jp SEO score

75

Search Engine Optimization Advices

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 Zen-sk.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 Zen-sk.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

zen-sk.co.jp

Open Graph description is not detected on the main page of Zen Sk. 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: