Tools & Wizards About Us
iwanami.co.jp screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    72% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

iwanami.co.jp

岩波書店

Page Load Speed

9.4 sec in total

First Response

2.3 sec

Resources Loaded

5.6 sec

Page Rendered

1.5 sec

iwanami.co.jp screenshot

About Website

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

岩波書店公式サイト

Visit iwanami.co.jp

Key Findings

We analyzed Iwanami.co.jp page load time and found that the first response time was 2.3 sec and then it took 7.1 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

iwanami.co.jp performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.7 s

5/100

10%

LCP (Largest Contentful Paint)

Value7.6 s

3/100

25%

SI (Speed Index)

Value7.8 s

23/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.7 s

56/100

10%

Network Requests Diagram

iwanami.co.jp

2288 ms

web_serials1411.css

1886 ms

top_hoshino.css

1944 ms

top.css

1904 ms

whatsnew.js

1946 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 98% of them (46 requests) were addressed to the original Iwanami.co.jp, 2% (1 request) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Iwanami.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 71.7 kB (14%)

Content Size

499.7 kB

After Optimization

428.0 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Iwanami.co.jp main page is 499.7 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. 25% of websites need less resources to load. Images take 450.1 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 37.1 kB

  • Original 47.4 kB
  • After minification 40.4 kB
  • After compression 10.3 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 7.0 kB, which is 15% 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 37.1 kB or 78% of the original size.

Image Optimization

-7%

Potential reduce by 33.1 kB

  • Original 450.1 kB
  • After minification 417.0 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. Iwanami images are well optimized though.

CSS Optimization

-69%

Potential reduce by 1.5 kB

  • Original 2.2 kB
  • After minification 1.8 kB
  • After compression 666 B

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. Iwanami.co.jp needs all CSS files to be minified and compressed as it can save up to 1.5 kB or 69% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (41%)

Requests Now

46

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Iwanami. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

iwanami.co.jp

iwanami.co.jp

2288 ms

web_serials1411.css

web_serials1411.css

1886 ms

top_hoshino.css

top_hoshino.css

1944 ms

top.css

top.css

1904 ms

whatsnew.js

whatsnew.js

1946 ms

heute.js

heute.js

1950 ms

jquery-1.6.2.min.js

jquery-1.6.2.min.js

879 ms

top_hoshino.js

top_hoshino.js

1051 ms

iwanamishoten_logo.gif

iwanamishoten_logo.gif

216 ms

newtop.html

newtop.html

534 ms

search_icon.gif

search_icon.gif

291 ms

search_submit_bg.gif

search_submit_bg.gif

283 ms

container_bg.png

container_bg.png

528 ms

showwindow.jpg

showwindow.jpg

817 ms

showwindow.jpg

showwindow.jpg

453 ms

showwindow.jpg

showwindow.jpg

1226 ms

showwindow.jpg

showwindow.jpg

1066 ms

meigen.gif

meigen.gif

619 ms

check.gif

check.gif

673 ms

left_bg.png

left_bg.png

706 ms

center_h2_back.gif

center_h2_back.gif

789 ms

more.gif

more.gif

849 ms

center_h2_li1.gif

center_h2_li1.gif

881 ms

click.gif

click.gif

957 ms

center_h2_li3.gif

center_h2_li3.gif

973 ms

center_ymd.gif

center_ymd.gif

1023 ms

201603-hyo1s.jpg

201603-hyo1s.jpg

1229 ms

showwindow.gif

showwindow.gif

1124 ms

right_h2_back2.gif

right_h2_back2.gif

1136 ms

top_bg01e.png

top_bg01e.png

1200 ms

up.gif

up.gif

1239 ms

logo_top.png

logo_top.png

1292 ms

logo_top.png

logo_top.png

1299 ms

logo_top.png

logo_top.png

1368 ms

right_h2_back1.gif

right_h2_back1.gif

1386 ms

right_h2_li1.gif

right_h2_li1.gif

1396 ms

0610850.jpg

0610850.jpg

1405 ms

4315870.jpg

4315870.jpg

1450 ms

right_h2_li2.gif

right_h2_li2.gif

1451 ms

right_h2_mail.gif

right_h2_mail.gif

1546 ms

widgets.js

widgets.js

42 ms

iwanamishoten_logo_s.gif

iwanamishoten_logo_s.gif

1453 ms

jasrac.jpg

jasrac.jpg

1431 ms

jqs-controls_next_bn.png

jqs-controls_next_bn.png

1445 ms

jqs-controls_prev_bn.png

jqs-controls_prev_bn.png

1481 ms

jqs-controls_next.png

jqs-controls_next.png

1359 ms

jqs-controls_prev.png

jqs-controls_prev.png

1463 ms

Accessibility Review

iwanami.co.jp accessibility score

77

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

iwanami.co.jp best practices score

75

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

iwanami.co.jp SEO score

90

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

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Iwanami.co.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 Iwanami.co.jp main page’s claimed encoding is shift_jis. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

iwanami.co.jp

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