Tools & Wizards About Us
zero52.jp screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

zero52.jp

零戦 五二型：ホーム | アシェット・コレクションズ・ジャパン株式会社

Page Load Speed

21.2 sec in total

First Response

412 ms

Resources Loaded

18.1 sec

Page Rendered

2.6 sec

zero52.jp screenshot

About Website

Welcome to zero52.jp homepage info - get ready to check Zero 52 best content right away, or after learning these important things about zero52.jp

1月17日（水）創刊！最強の戦闘機が今よみがえる！ -零戦 五二型-

Visit zero52.jp

Key Findings

We analyzed Zero52.jp page load time and found that the first response time was 412 ms and then it took 20.8 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

zero52.jp performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value7.1 s

31/100

10%

TBT (Total Blocking Time)

Value1,180 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value1.051

2/100

15%

TTI (Time to Interactive)

Value10.9 s

21/100

10%

Network Requests Diagram

home.html

412 ms

gtm.js

60 ms

styles.css

387 ms

jquery.min.js

33 ms

libs.js

359 ms

Our browser made a total of 274 requests to load all elements on the main page. We found that 46% of them (126 requests) were addressed to the original Zero52.jp, 47% (129 requests) were made to Hachette.jp-east-2.storage.api.nifcloud.com and 1% (4 requests) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (11.8 sec) relates to the external source Hachette.jp-east-2.storage.api.nifcloud.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 242.0 kB (18%)

Content Size

1.3 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zero52.jp main page is 1.3 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. 55% of websites need less resources to load. Images take 981.1 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 76.3 kB

  • Original 89.8 kB
  • After minification 76.2 kB
  • After compression 13.5 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 13.6 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 76.3 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 183 B

  • Original 981.1 kB
  • After minification 980.9 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. Zero 52 images are well optimized though.

JavaScript Optimization

-55%

Potential reduce by 125.6 kB

  • Original 227.3 kB
  • After minification 226.4 kB
  • After compression 101.6 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 125.6 kB or 55% of the original size.

CSS Optimization

-82%

Potential reduce by 39.8 kB

  • Original 48.4 kB
  • After minification 48.4 kB
  • After compression 8.6 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. Zero52.jp needs all CSS files to be minified and compressed as it can save up to 39.8 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 44 (30%)

Requests Now

148

After Optimization

104

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 148 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zero 52. 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.

Network Requests Diagram

home.html

home.html

412 ms

gtm.js

gtm.js

60 ms

styles.css

styles.css

387 ms

jquery.min.js

jquery.min.js

33 ms

libs.js

libs.js

359 ms

common.js

common.js

355 ms

home.js

home.js

358 ms

mainvis.js

mainvis.js

358 ms

analytics.js

analytics.js

19 ms

collect

collect

32 ms

collect

collect

60 ms

ga-audiences

ga-audiences

29 ms

common.js

common.js

881 ms

home.js

home.js

900 ms

libs.js

libs.js

1422 ms

mainvis.js

mainvis.js

911 ms

lineup_btn_ico.gif

lineup_btn_ico.gif

1057 ms

lineup_btn.png

lineup_btn.png

1032 ms

eshop_btn.png

eshop_btn.png

1032 ms

present01_btn_appli_sp.png

present01_btn_appli_sp.png

1053 ms

header_logo.png

header_logo.png

1051 ms

header_btn_appli.png

header_btn_appli.png

1052 ms

header_btn_faq.png

header_btn_faq.png

1053 ms

mainvis_sp.jpg

mainvis_sp.jpg

1054 ms

present01_btn_appli.png

present01_btn_appli.png

1055 ms

present01_copy.png

present01_copy.png

1047 ms

present01_item01_h.png

present01_item01_h.png

1049 ms

present01_item01_img01.png

present01_item01_img01.png

1050 ms

present01_item01_img02.png

present01_item01_img02.png

1080 ms

present01_item02_h.png

present01_item02_h.png

1081 ms

present01_item02_img01.png

present01_item02_img01.png

1050 ms

present01_item02_img02.png

present01_item02_img02.png

1091 ms

present01_premium_img.png

present01_premium_img.png

1093 ms

present01_benefit_img.png

present01_benefit_img.png

1094 ms

present01_note.png

present01_note.png

1105 ms

present01_intro_sp.png

present01_intro_sp.png

1109 ms

present01_btn_faq.png

present01_btn_faq.png

1113 ms

h.png

h.png

1114 ms

lead_h.png

lead_h.png

1116 ms

main.png

main.png

1124 ms

img01.jpg

img01.jpg

1129 ms

ico_zoom.png

ico_zoom.png

1136 ms

ico_num01.png

ico_num01.png

1138 ms

img02.jpg

img02.jpg

1138 ms

ico_num02.png

ico_num02.png

1139 ms

img03.jpg

img03.jpg

1140 ms

ico_num03.png

ico_num03.png

1208 ms

img04.jpg

img04.jpg

1208 ms

ico_num04.png

ico_num04.png

1209 ms

img05.jpg

img05.jpg

1225 ms

ico_num05.png

ico_num05.png

1226 ms

img06.jpg

img06.jpg

1227 ms

sdk.js

sdk.js

1013 ms

lineup_btn.png

lineup_btn.png

589 ms

eshop_btn.png

eshop_btn.png

609 ms

header_logo.png

header_logo.png

890 ms

present01_btn_appli_sp.png

present01_btn_appli_sp.png

813 ms

lineup_btn_ico.gif

lineup_btn_ico.gif

728 ms

header_btn_appli.png

header_btn_appli.png

586 ms

header_btn_faq.png

header_btn_faq.png

1064 ms

mainvis_sp.jpg

mainvis_sp.jpg

2194 ms

present01_copy.png

present01_copy.png

1302 ms

present01_btn_appli.png

present01_btn_appli.png

1553 ms

present01_item01_h.png

present01_item01_h.png

1298 ms

present01_item01_img01.png

present01_item01_img01.png

1686 ms

present01_item02_img01.png

present01_item02_img01.png

1707 ms

present01_item01_img02.png

present01_item01_img02.png

1908 ms

present01_item02_h.png

present01_item02_h.png

1820 ms

present01_item02_img02.png

present01_item02_img02.png

2224 ms

present01_premium_img.png

present01_premium_img.png

2441 ms

present01_benefit_img.png

present01_benefit_img.png

2299 ms

present01_note.png

present01_note.png

2279 ms

present01_intro_sp.png

present01_intro_sp.png

2362 ms

present01_btn_faq.png

present01_btn_faq.png

2630 ms

h.png

h.png

2828 ms

lead_h.png

lead_h.png

2919 ms

main.png

main.png

3747 ms

img01.jpg

img01.jpg

3004 ms

ico_zoom.png

ico_zoom.png

2901 ms

ico_num01.png

ico_num01.png

3095 ms

img02.jpg

img02.jpg

3493 ms

ico_num02.png

ico_num02.png

3377 ms

img03.jpg

img03.jpg

3549 ms

tt-2fbf317387d52ebc9838265c45838977ed49681ed17cd8f0542a7d963958ca55.js

tt-2fbf317387d52ebc9838265c45838977ed49681ed17cd8f0542a7d963958ca55.js

190 ms

sdk.js

sdk.js

95 ms

ico_num06.png

ico_num06.png

255 ms

img07.jpg

img07.jpg

247 ms

ico_num07.png

ico_num07.png

242 ms

img08.jpg

img08.jpg

246 ms

ico_num08.png

ico_num08.png

241 ms

img09.jpg

img09.jpg

249 ms

ico_num10.png

ico_num10.png

390 ms

ico_num11.png

ico_num11.png

390 ms

ico_num12.png

ico_num12.png

566 ms

img13.jpg

img13.jpg

557 ms

ico_num13.png

ico_num13.png

556 ms

img14.jpg

img14.jpg

556 ms

ico_num14.png

ico_num14.png

550 ms

feature.png

feature.png

563 ms

present02_copy.png

present02_copy.png

716 ms

present02_item01_h.png

present02_item01_h.png

726 ms

present02_item01_img01.png

present02_item01_img01.png

723 ms

present02_item01_img02.png

present02_item01_img02.png

727 ms

present02_item02_h.png

present02_item02_h.png

736 ms

present02_item02_img01.png

present02_item02_img01.png

733 ms

present02_item02_img02.png

present02_item02_img02.png

888 ms

present02_btn_appli.png

present02_btn_appli.png

902 ms

present02_btn_faq.png

present02_btn_faq.png

897 ms

h.png

h.png

910 ms

main.png

main.png

894 ms

ico_num03.png

ico_num03.png

3424 ms

img04.jpg

img04.jpg

3661 ms

ico_num04.png

ico_num04.png

3805 ms

img05.jpg

img05.jpg

4066 ms

ico_num05.png

ico_num05.png

3916 ms

img06.jpg

img06.jpg

4099 ms

img01.jpg

img01.jpg

1007 ms

ico_num01.png

ico_num01.png

1015 ms

img02.jpg

img02.jpg

1014 ms

ico_num02.png

ico_num02.png

1016 ms

img03.jpg

img03.jpg

1036 ms

ico_num03.png

ico_num03.png

1039 ms

ico_num08.png

ico_num08.png

3987 ms

ico_num07.png

ico_num07.png

3949 ms

img07.jpg

img07.jpg

4251 ms

img08.jpg

img08.jpg

4402 ms

img09.jpg

img09.jpg

4371 ms

ico_num06.png

ico_num06.png

4416 ms

preview.html

preview.html

143 ms

img04.jpg

img04.jpg

1004 ms

ico_num04.png

ico_num04.png

1019 ms

img05.jpg

img05.jpg

1019 ms

ico_num05.png

ico_num05.png

1016 ms

img06.jpg

img06.jpg

1043 ms

ico_num06.png

ico_num06.png

1048 ms

img11.jpg

img11.jpg

11638 ms

img10.jpg

img10.jpg

4310 ms

ico_num09.png

ico_num09.png

4605 ms

img12.jpg

img12.jpg

4873 ms

ico_num10.png

ico_num10.png

4753 ms

ico_num11.png

ico_num11.png

4752 ms

preview.html

preview.html

80 ms

img07.jpg

img07.jpg

985 ms

ico_num07.png

ico_num07.png

999 ms

img08.jpg

img08.jpg

1000 ms

ico_num08.png

ico_num08.png

1010 ms

remocon_img.png

remocon_img.png

1038 ms

remocon_h.png

remocon_h.png

1043 ms

459077.html

459077.html

100 ms

ico_num14.png

ico_num14.png

4625 ms

img13.jpg

img13.jpg

5098 ms

img14.jpg

img14.jpg

5099 ms

ico_num13.png

ico_num13.png

5085 ms

conversion.js

conversion.js

21 ms

feature.png

feature.png

5726 ms

ico_num12.png

ico_num12.png

5180 ms

movie.png

movie.png

1023 ms

h.png

h.png

1038 ms

box01_h.png

box01_h.png

1040 ms

box01_img.png

box01_img.png

1051 ms

label_point01.png

label_point01.png

1154 ms

label_point02.png

label_point02.png

1155 ms

93 ms

fbevents.js

fbevents.js

3 ms

1895199074033559

1895199074033559

973 ms

19 ms

present02_copy.png

present02_copy.png

5420 ms

present02_item01_img01.png

present02_item01_img01.png

5856 ms

present02_item01_h.png

present02_item01_h.png

5426 ms

box02_h.png

box02_h.png

1029 ms

box02_img.png

box02_img.png

1045 ms

box03_h.png

box03_h.png

1049 ms

present02_item01_img02.png

present02_item01_img02.png

5523 ms

box03_img.png

box03_img.png

1057 ms

present02_item02_img01.png

present02_item02_img01.png

5903 ms

present02_item02_h.png

present02_item02_h.png

6022 ms

present02_item02_img02.png

present02_item02_img02.png

6001 ms

present02_premium_img.png

present02_premium_img.png

6080 ms

present02_btn_appli.png

present02_btn_appli.png

6159 ms

present02_btn_faq.png

present02_btn_faq.png

6217 ms

h.png

h.png

6526 ms

main.png

main.png

6779 ms

box04_h.png

box04_h.png

904 ms

box04_img.png

box04_img.png

911 ms

box05_h.png

box05_h.png

1003 ms

box05_img.png

box05_img.png

1021 ms

binder_h.png

binder_h.png

1023 ms

binder_img.png

binder_img.png

1035 ms

pagebottom.png

pagebottom.png

1084 ms

header_bg.jpg

header_bg.jpg

1092 ms

img01.jpg

img01.jpg

6723 ms

ico_num01.png

ico_num01.png

6503 ms

img02.jpg

img02.jpg

6889 ms

ico_num02.png

ico_num02.png

6846 ms

img03.jpg

img03.jpg

7328 ms

ico_num03.png

ico_num03.png

7101 ms

header_nav.png

header_nav.png

939 ms

header_sns_bg.png

header_sns_bg.png

957 ms

sns_facebookpage.png

sns_facebookpage.png

961 ms

mailto.png

mailto.png

972 ms

bg.jpg

bg.jpg

1039 ms

main.png

main.png

1042 ms

img04.jpg

img04.jpg

7547 ms

ico_num04.png

ico_num04.png

7185 ms

img05.jpg

img05.jpg

7558 ms

ico_num05.png

ico_num05.png

7436 ms

img06.jpg

img06.jpg

7814 ms

ico_num06.png

ico_num06.png

7685 ms

img07.jpg

img07.jpg

7929 ms

mask01.png

mask01.png

857 ms

mask02.png

mask02.png

876 ms

pic.png

pic.png

880 ms

tvcm.png

tvcm.png

892 ms

movie.png

movie.png

956 ms

copy.png

copy.png

967 ms

badge.png

badge.png

1030 ms

ico_num07.png

ico_num07.png

7842 ms

img08.jpg

img08.jpg

8053 ms

ico_num08.png

ico_num08.png

8018 ms

remocon_img.png

remocon_img.png

8280 ms

remocon_h.png

remocon_h.png

8455 ms

product.png

product.png

916 ms

view360.png

view360.png

919 ms

bg.jpg

bg.jpg

933 ms

h_bg.jpg

h_bg.jpg

1004 ms

box_bg.jpg

box_bg.jpg

1016 ms

movie.png

movie.png

8552 ms

h.png

h.png

8353 ms

box01_h.png

box01_h.png

8362 ms

box01_img.png

box01_img.png

8978 ms

bg.png

bg.png

997 ms

bg.jpg

bg.jpg

1018 ms

binder_bg.jpg

binder_bg.jpg

1021 ms

footer.png

footer.png

1037 ms

31 ms

label_point01.png

label_point01.png

8741 ms

label_point02.png

label_point02.png

8732 ms

up.png

up.png

1025 ms

box02_h.png

box02_h.png

8689 ms

box02_img.png

box02_img.png

9194 ms

box03_h.png

box03_h.png

9174 ms

box03_img.png

box03_img.png

9303 ms

box04_h.png

box04_h.png

9134 ms

box04_img.png

box04_img.png

9652 ms

box05_h.png

box05_h.png

9520 ms

box05_img.png

box05_img.png

9659 ms

binder_h.png

binder_h.png

9509 ms

binder_img.png

binder_img.png

9787 ms

pagebottom.png

pagebottom.png

9935 ms

header_bg.jpg

header_bg.jpg

9937 ms

header_nav.png

header_nav.png

9949 ms

header_sns_bg.png

header_sns_bg.png

10010 ms

sns_facebookpage.png

sns_facebookpage.png

10186 ms

mailto.png

mailto.png

10306 ms

bg.jpg

bg.jpg

10581 ms

main.png

main.png

10754 ms

mask01.png

mask01.png

10272 ms

mask02.png

mask02.png

10358 ms

pic.png

pic.png

10835 ms

tvcm.png

tvcm.png

10629 ms

movie.png

movie.png

10678 ms

copy.png

copy.png

10927 ms

badge.png

badge.png

10830 ms

product.png

product.png

11155 ms

view360.png

view360.png

10990 ms

bg.jpg

bg.jpg

11387 ms

h_bg.jpg

h_bg.jpg

11219 ms

box_bg.jpg

box_bg.jpg

11209 ms

bg.png

bg.png

11516 ms

bg.jpg

bg.jpg

11821 ms

binder_bg.jpg

binder_bg.jpg

11475 ms

footer.png

footer.png

11596 ms

up.png

up.png

11517 ms

7 ms

Accessibility Review

zero52.jp accessibility score

85

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.

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

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

zero52.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

zero52.jp SEO score

100

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

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 Zero52.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 Zero52.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

zero52.jp

Open Graph data is detected on the main page of Zero 52. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: