Report Summary

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    Best Practices

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ケン・コーポレーション グループ | 東京・横浜の高級賃貸マンション・高級住宅の賃貸・売買・管理と賃貸オフィスの仲介ならKEN

Page Load Speed

8 sec in total

First Response

570 ms

Resources Loaded

7.2 sec

Page Rendered

241 ms screenshot

About Website

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

高級賃貸・高級住宅仲介を中心とする総合不動産会社、ケン・コーポレーションの公式サイトです。東京・横浜の賃貸、売買、オフィス賃貸、事業用不動産の検索とサービス内容をご紹介。土地の有効活用の企画、英語対応が必要な外資系外国人や東京への転勤者向けの社宅仲介も行っております。そのほか、ケン・コーポレーション グループとしてホテル事業・太陽光発電事業・エンターテイメント等の文化事業を手掛けています。


Key Findings

We analyzed page load time and found that the first response time was 570 ms and then it took 7.5 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 performance score


Network Requests Diagram

570 ms

1033 ms


1942 ms


1219 ms


1033 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 56% of them (33 requests) were addressed to the original, 7% (4 requests) were made to and 7% (4 requests) were made to The less responsive or slowest element that took the longest time to load (3.7 sec) belongs to the original domain

Page Optimization Overview & Recommendations

Page size can be reduced by 444.0 kB (29%)

Content Size

1.5 MB

After Optimization

1.1 MB

In fact, the total size of 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. 20% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization


Potential reduce by 19.2 kB

  • Original 25.1 kB
  • After minification 20.0 kB
  • After compression 5.9 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 5.1 kB, which is 20% 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 19.2 kB or 76% of the original size.

Image Optimization


Potential reduce by 65.3 kB

  • Original 1.0 MB
  • After minification 939.9 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. Kencorp images are well optimized though.

JavaScript Optimization


Potential reduce by 149.9 kB

  • Original 267.4 kB
  • After minification 253.4 kB
  • After compression 117.5 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 149.9 kB or 56% of the original size.

CSS Optimization


Potential reduce by 209.6 kB

  • Original 242.6 kB
  • After minification 204.3 kB
  • After compression 33.0 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. needs all CSS files to be minified and compressed as it can save up to 209.6 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (46%)

Requests Now


After Optimization


The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kencorp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.

SEO Factors SEO score


Language and Encoding

  • Language Detected


  • Language Claimed


  • Encoding


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