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kousakusha.co.jp screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

kousakusha.co.jp

工作舎の本

Page Load Speed

6.4 sec in total

First Response

982 ms

Resources Loaded

5.1 sec

Page Rendered

359 ms

kousakusha.co.jp screenshot

About Website

Visit kousakusha.co.jp now to see the best up-to-date Kousakusha content for Japan and also check out these interesting facts you probably never knew about kousakusha.co.jp

出版社・工作舎のホームページ。自然科学・人文科学・文学・芸術などの書籍を刊行しています。2010年7月より東京都新宿区。

Visit kousakusha.co.jp

Key Findings

We analyzed Kousakusha.co.jp page load time and found that the first response time was 982 ms and then it took 5.5 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

kousakusha.co.jp performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

20/100

10%

LCP (Largest Contentful Paint)

Value7.8 s

3/100

25%

SI (Speed Index)

Value5.9 s

47/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.102

89/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

kousakusha.co.jp

982 ms

bootstrap.css

1297 ms

my-bootstrap.css

289 ms

font-awesome.min.css

685 ms

soryusi.jpg

865 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 84% of them (27 requests) were addressed to the original Kousakusha.co.jp, 6% (2 requests) were made to Google-analytics.com and 6% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (3.6 sec) belongs to the original domain Kousakusha.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 381.1 kB (18%)

Content Size

2.1 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kousakusha.co.jp main page is 2.1 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 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 21.1 kB

  • Original 26.8 kB
  • After minification 22.2 kB
  • After compression 5.7 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. This page needs HTML code to be minified as it can gain 4.6 kB, which is 17% 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 21.1 kB or 79% of the original size.

Image Optimization

-6%

Potential reduce by 113.8 kB

  • Original 1.8 MB
  • After minification 1.7 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. Kousakusha images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 89.8 kB

  • Original 138.8 kB
  • After minification 138.8 kB
  • After compression 49.0 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 89.8 kB or 65% of the original size.

CSS Optimization

-85%

Potential reduce by 156.3 kB

  • Original 184.0 kB
  • After minification 155.0 kB
  • After compression 27.7 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. Kousakusha.co.jp needs all CSS files to be minified and compressed as it can save up to 156.3 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (10%)

Requests Now

29

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kousakusha. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

kousakusha.co.jp

kousakusha.co.jp

982 ms

bootstrap.css

bootstrap.css

1297 ms

my-bootstrap.css

my-bootstrap.css

289 ms

font-awesome.min.css

font-awesome.min.css

685 ms

soryusi.jpg

soryusi.jpg

865 ms

nendo2015_main.jpg

nendo2015_main.jpg

2208 ms

ein_main.jpg

ein_main.jpg

873 ms

image_hoshinage.jpg

image_hoshinage.jpg

2739 ms

leib_alt.jpg

leib_alt.jpg

1327 ms

image_sanpo.jpg

image_sanpo.jpg

2785 ms

dekiru_obi.jpg

dekiru_obi.jpg

1810 ms

dekiru.jpg

dekiru.jpg

1350 ms

hansen.jpg

hansen.jpg

1600 ms

nsri3.jpg

nsri3.jpg

1987 ms

leib_header_01_proto3.jpg

leib_header_01_proto3.jpg

2178 ms

jquery-1.11.2.min.js

jquery-1.11.2.min.js

2963 ms

bootstrap.min.js

bootstrap.min.js

2563 ms

urchin.js

urchin.js

9 ms

haeckel.jpg

haeckel.jpg

2600 ms

sanbookshamadayama.jpg

sanbookshamadayama.jpg

2949 ms

abcroppongi2015.jpg

abcroppongi2015.jpg

3626 ms

2015card.jpg

2015card.jpg

3287 ms

nendo2015.jpg

nendo2015.jpg

3130 ms

kpw_banner_new.jpg

kpw_banner_new.jpg

3140 ms

kousakusha_logo.jpg

kousakusha_logo.jpg

3394 ms

css

css

58 ms

nohon4.jpg

nohon4.jpg

2585 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

2721 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

3024 ms

v0SdcGFAl2aezM9Vq_aFTQ.ttf

v0SdcGFAl2aezM9Vq_aFTQ.ttf

18 ms

DvlFBScY1r-FMtZSYIYoYw.ttf

DvlFBScY1r-FMtZSYIYoYw.ttf

26 ms

__utm.gif

__utm.gif

4 ms

Accessibility Review

kousakusha.co.jp accessibility score

88

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

kousakusha.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

kousakusha.co.jp SEO score

97

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kousakusha.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it does not match the claimed English language. Our system also found out that Kousakusha.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

kousakusha.co.jp

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