Tools & Wizards About Us
denon.jp screenshot

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 64

    Accessibility

    Visual factors better than
    that of 29% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

denon.jp

Denon - デノン製品公式サイト

Page Load Speed

21.4 sec in total

First Response

44 ms

Resources Loaded

21.1 sec

Page Rendered

294 ms

denon.jp screenshot

About Website

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

【Denon公式製品サイト】Denonは1910年創業のオーディオブランドです。高品質を追求したAVアンプ、スピーカー、ヘッドホン等のオーディオ製品のご紹介や、その他製品カタログのご請求、修理のご依頼なども承っております。

Visit denon.jp

Key Findings

We analyzed Denon.jp page load time and found that the first response time was 44 ms and then it took 21.4 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. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

denon.jp performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

49/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value12.8 s

2/100

10%

TBT (Total Blocking Time)

Value2,020 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0.883

3/100

15%

TTI (Time to Interactive)

Value20.0 s

2/100

10%

Network Requests Diagram

denon.jp

44 ms

www.denon.jp

81 ms

ja-jp

287 ms

gtm.js

97 ms

jquery.min.js

51 ms

Our browser made a total of 320 requests to load all elements on the main page. We found that 74% of them (238 requests) were addressed to the original Denon.jp, 12% (37 requests) were made to S.amazon-adsystem.com and 2% (5 requests) were made to Cm.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (19.8 sec) relates to the external source Public-prod-dspcookiematching.dmxleo.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 157.0 kB (6%)

Content Size

2.8 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Denon.jp main page is 2.8 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. Only a small number of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 122.6 kB

  • Original 150.1 kB
  • After minification 150.0 kB
  • After compression 27.5 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 122.6 kB or 82% of the original size.

Image Optimization

-0%

Potential reduce by 5 B

  • Original 1.6 MB
  • After minification 1.6 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. Denon images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 34.4 kB

  • Original 925.0 kB
  • After minification 924.9 kB
  • After compression 890.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 36 B

  • Original 79.3 kB
  • After minification 79.3 kB
  • After compression 79.2 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. Denon.jp has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 256 (86%)

Requests Now

299

After Optimization

43

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 299 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Denon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 203 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

denon.jp

denon.jp

44 ms

www.denon.jp

www.denon.jp

81 ms

ja-jp

ja-jp

287 ms

gtm.js

gtm.js

97 ms

jquery.min.js

jquery.min.js

51 ms

bvapi.js

bvapi.js

155 ms

style.css

style.css

95 ms

font-awesome.css

font-awesome.css

90 ms

slick.css

slick.css

90 ms

slider-drag.css

slider-drag.css

91 ms

layout_jp.css

layout_jp.css

89 ms

addthis_widget.js

addthis_widget.js

146 ms

email-decode.min.js

email-decode.min.js

79 ms

ie-origin-fix.js

ie-origin-fix.js

137 ms

xaquery.js

xaquery.js

140 ms

moment.js

moment.js

138 ms

lo-dash.js

lo-dash.js

137 ms

modernizr.js

modernizr.js

135 ms

galleria-157.js

galleria-157.js

138 ms

fullcalendar.js

fullcalendar.js

244 ms

gcal.js

gcal.js

243 ms

jqueryuitouch-punchmin.js

jqueryuitouch-punchmin.js

243 ms

hammer.js

hammer.js

304 ms

backbone-min.js

backbone-min.js

307 ms

typeahead.js

typeahead.js

305 ms

jquerymCustomScrollbar.js

jquerymCustomScrollbar.js

306 ms

flash-polyfill.js

flash-polyfill.js

306 ms

mediaelement-and-player.js

mediaelement-and-player.js

306 ms

dailymotion.js

dailymotion.js

307 ms

facebook.js

facebook.js

307 ms

soundcloud.js

soundcloud.js

309 ms

twitch.js

twitch.js

310 ms

vimeo.js

vimeo.js

307 ms

xa.js

xa.js

308 ms

observer.js

observer.js

310 ms

partial-design-highlight.js

partial-design-highlight.js

309 ms

trackinginit.js

trackinginit.js

309 ms

tracking.js

tracking.js

310 ms

trackingmovies.js

trackingmovies.js

311 ms

trackingmoviesmejsplayer.js

trackingmoviesmejsplayer.js

310 ms

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311 ms

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307 ms

trackingmoviesyoutubeplayer.js

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245 ms

trackingmoviesyoutubeplayerhandlers.js

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242 ms

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239 ms

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component-location-service.js

241 ms

component-map.js

component-map.js

241 ms

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component-location-service.js

242 ms

component-search.js

component-search.js

238 ms

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188 ms

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185 ms

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185 ms

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184 ms

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184 ms

component-search-facet-dropdown.js

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83 ms

component-search-facet-managed-range.js

component-search-facet-managed-range.js

213 ms

component-search-facet-range-slider.js

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82 ms

js

js

186 ms

analytics.js

analytics.js

265 ms

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362 ms

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367 ms

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destination

323 ms

dtag.js

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743 ms

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pa-5f8ecb81dfb2d5001300009a.js

944 ms

hotjar-2018946.js

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415 ms

denon.js

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556 ms

events.js

events.js

406 ms

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281 ms

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281 ms

component-search-location-filter.js

component-search-location-filter.js

281 ms

component-search-page-selector.js

component-search-page-selector.js

279 ms

component-search-page-size.js

component-search-page-size.js

279 ms

component-search-parameters.js

component-search-parameters.js

277 ms

component-search-query.js

component-search-query.js

355 ms

component-search-radius-filter.js

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351 ms

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353 ms

component-search-results-count.js

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352 ms

component-search-results-filter.js

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351 ms

component-search-sort.js

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351 ms

component-search-url.js

component-search-url.js

400 ms

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400 ms

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398 ms

component-search-router.js

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396 ms

component-search-facet-daterange.js

component-search-facet-daterange.js

467 ms

accessibility.js

accessibility.js

396 ms

component-accordions.js

component-accordions.js

465 ms

component-archive.js

component-archive.js

512 ms

component-breadcrumb.js

component-breadcrumb.js

511 ms

component-carousel.js

component-carousel.js

530 ms

component-container.js

component-container.js

509 ms

component-disqus.js

component-disqus.js

529 ms

component-facebook.js

component-facebook.js

531 ms

component-flash.js

component-flash.js

529 ms

component-flip.js

component-flip.js

528 ms

component-fullcalendar.js

component-fullcalendar.js

529 ms

component-galleria.js

component-galleria.js

533 ms

component-language-selector.js

component-language-selector.js

529 ms

component-navigation.js

component-navigation.js

529 ms

component-overlay.js

component-overlay.js

529 ms

component-snippet.js

component-snippet.js

532 ms

component-social.js

component-social.js

531 ms

jquery-bv%403.5.1%2Blodash-bv%404.17.19.js

jquery-bv%403.5.1%2Blodash-bv%404.17.19.js

255 ms

bv-primary.js

bv-primary.js

334 ms

component-tabs.js

component-tabs.js

521 ms

component-toggle.js

component-toggle.js

399 ms

collect

collect

436 ms

collect

collect

86 ms

collect

collect

126 ms

component-video.js

component-video.js

335 ms

component-video-playlist.js

component-video-playlist.js

335 ms

details-polyfill.js

details-polyfill.js

389 ms

fixheight.js

fixheight.js

391 ms

search-fixheight.js

search-fixheight.js

389 ms

resolveconflicts.js

resolveconflicts.js

369 ms

iu3

iu3

60 ms

knockout-3-4-2.js

knockout-3-4-2.js

316 ms

jquery-321.js

jquery-321.js

315 ms

jqueryvalidate.js

jqueryvalidate.js

378 ms

bootstrap-121.js

bootstrap-121.js

379 ms

jqueryunobtrusive-ajax.js

jqueryunobtrusive-ajax.js

377 ms

jqueryvalidateunobtrusive.js

jqueryvalidateunobtrusive.js

376 ms

screen.css

screen.css

82 ms

collect

collect

275 ms

pr

pr

137 ms

jquerycookie.js

jquerycookie.js

331 ms

jqueryplaceholder.js

jqueryplaceholder.js

330 ms

jsuri-111.js

jsuri-111.js

582 ms

knockoutvalidation-200.js

knockoutvalidation-200.js

580 ms

dom-observer.js

dom-observer.js

578 ms

messaging.js

messaging.js

509 ms

ajax.js

ajax.js

463 ms

productselection.js

productselection.js

464 ms

productprice.js

productprice.js

548 ms

529 ms

setuid

setuid

560 ms

cookie_sync

cookie_sync

548 ms

Serving

Serving

570 ms

amazon

amazon

523 ms

sync

sync

195 ms

dspreply

dspreply

19776 ms

map

map

700 ms

usermatch.gif

usermatch.gif

194 ms

v1

v1

517 ms

pixel

pixel

562 ms

v2

v2

193 ms

usersync

usersync

548 ms

ecm3

ecm3

557 ms

cart-context.js

cart-context.js

535 ms

pixel

pixel

561 ms

productselection-models.js

productselection-models.js

527 ms

application.js

application.js

528 ms

component.js

component.js

525 ms

startup.js

startup.js

527 ms

form.js

form.js

581 ms

account-registration.js

account-registration.js

579 ms

account-login.js

account-login.js

580 ms

account-forgotpassword.js

account-forgotpassword.js

577 ms

account-address-list.js

account-address-list.js

577 ms

account-address-list-model.js

account-address-list-model.js

576 ms

account-address-editor.js

account-address-editor.js

600 ms

account-address-editor-model.js

account-address-editor-model.js

602 ms

account-orders-model.js

account-orders-model.js

606 ms

bv-analytics.js

bv-analytics.js

478 ms

main.MTIyYzc3NzllMA.js

main.MTIyYzc3NzllMA.js

80 ms

modules.1a30a0a67c3c23c13060.js

modules.1a30a0a67c3c23c13060.js

474 ms

account-recent-orders.js

account-recent-orders.js

552 ms

account-order-history.js

account-order-history.js

535 ms

account-changepassword.js

account-changepassword.js

504 ms

account-profileeditor.js

account-profileeditor.js

500 ms

cart-checkout-address-model.js

cart-checkout-address-model.js

500 ms

cart-checkout-delivery-model.js

cart-checkout-delivery-model.js

511 ms

cart-checkout-billing-model.js

cart-checkout-billing-model.js

505 ms

cart-checkout-review-model.js

cart-checkout-review-model.js

519 ms

cart-checkout-delivery.js

cart-checkout-delivery.js

504 ms

ga-audiences

ga-audiences

421 ms

cart-checkout-billing.js

cart-checkout-billing.js

446 ms

cart-checkout-review.js

cart-checkout-review.js

458 ms

cart-models.js

cart-models.js

475 ms

cart-addtocart.js

cart-addtocart.js

461 ms

cart-addtocart-productselection-handler.js

cart-addtocart-productselection-handler.js

466 ms

cart-lines-model.js

cart-lines-model.js

432 ms

ecm3

ecm3

112 ms

cart-lines.js

cart-lines.js

233 ms

cart-total.js

cart-total.js

233 ms

cart-total-model.js

cart-total-model.js

233 ms

cart-promotion.js

cart-promotion.js

237 ms

cart-promotion-model.js

cart-promotion-model.js

243 ms

cart-minicart-model.js

cart-minicart-model.js

244 ms

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47 ms

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68 ms

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58 ms

cart-minicart.js

cart-minicart.js

175 ms

catalog-productlistsorting.js

catalog-productlistsorting.js

176 ms

catalog-productlistitemsperpage.js

catalog-productlistitemsperpage.js

175 ms

catalog-productprice-model.js

catalog-productprice-model.js

174 ms

ecm3

ecm3

65 ms

catalog-productprice.js

catalog-productprice.js

193 ms

ecm3

ecm3

65 ms

match

match

47 ms

ecm3

ecm3

63 ms

catalog-productinventory-model.js

catalog-productinventory-model.js

179 ms

ecm3

ecm3

54 ms

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55 ms

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54 ms

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56 ms

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61 ms

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59 ms

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46 ms

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57 ms

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33 ms

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40 ms

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42 ms

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45 ms

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41 ms

catalog-productInventory.js

catalog-productInventory.js

141 ms

catalog-productvariant-model.js

catalog-productvariant-model.js

141 ms

catalog-productvariant.js

catalog-productvariant.js

147 ms

catalog-productfacets.js

catalog-productfacets.js

142 ms

catalog-productlist.js

catalog-productlist.js

154 ms

catalog-productlist-model.js

catalog-productlist-model.js

163 ms

ecm3

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26 ms

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30 ms

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31 ms

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26 ms

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27 ms

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28 ms

catalog-promotedproducts.js

catalog-promotedproducts.js

137 ms

catalog-promotedproducts-model.js

catalog-promotedproducts-model.js

143 ms

ecm3

ecm3

23 ms

ecm3

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21 ms

catalog-productbundle.js

catalog-productbundle.js

137 ms

catalog-productbundle-model.js

catalog-productbundle-model.js

147 ms

ecm3

ecm3

22 ms

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21 ms

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17 ms

catalog-productlistheader.js

catalog-productlistheader.js

144 ms

language-selection-language.js

language-selection-language.js

163 ms

messageSummarymodel.js

messageSummarymodel.js

146 ms

messageSummary.js

messageSummary.js

143 ms

category-navigation-navigationbar.js

category-navigation-navigationbar.js

145 ms

main.js

main.js

194 ms

browser.js

browser.js

167 ms

forms.js

forms.js

153 ms

add-to-cart.js

add-to-cart.js

147 ms

category-navigation.js

category-navigation.js

157 ms

component-carousel.js

component-carousel.js

167 ms

language-selector.js

language-selector.js

161 ms

product-bundle.js

product-bundle.js

151 ms

product-facet-component.js

product-facet-component.js

158 ms

product-image.js

product-image.js

155 ms

search-bar.js

search-bar.js

171 ms

sub-category-navigation-component.js

sub-category-navigation-component.js

168 ms

topbarlinks.js

topbarlinks.js

164 ms

easing.js.min.js

easing.js.min.js

182 ms

jquery.sticky.js

jquery.sticky.js

173 ms

lightGallery.min.js

lightGallery.min.js

169 ms

owl.carousel.min.js

owl.carousel.min.js

184 ms

slick.min.js

slick.min.js

181 ms

jquery.bxslider.js

jquery.bxslider.js

175 ms

slider-drag.js

slider-drag.js

201 ms

jcarousel.js

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180 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

201 ms

custom.js

custom.js

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denon.js

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cookie.js

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logo.jpg

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268 ms

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sprite2.png

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257 ms

sprite.png

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293 ms

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292 ms

bnrLoader.gif

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289 ms

bnrBlank.png

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270 ms

AVRX3800H_homebanner_JP.jpg

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279 ms

DP3000NE_homebanner.jpg

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268 ms

PerL_homebannerhomebanner.jpg

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268 ms

AVC_A1H_homebanner.jpg

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DHSB550SET_homebanner.jpg

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DCD1700NE_homebanner.jpg

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bookmarkIcon.png

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257 ms

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259 ms

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242 ms

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ga.js

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126 ms

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166 ms

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progress.gif

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207 ms

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207 ms

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250 ms

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collect

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236 ms

Accessibility Review

denon.jp accessibility score

64

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[role] values are not valid

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

denon.jp best practices score

67

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

denon.jp SEO score

79

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

    UTF-8

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

denon.jp

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