coravin.jp website review

A phone's processor spends 4.6 s on main-thread work while loading, 2.1 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Google Tag Manager, Clarity and Klaviyo and others), adding 1.6 MB and 938 ms of main-thread time.

Your mobile performance score is 88. Pages that score under 90 lose visitors before the first paint.

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 900 ms.

Google Tag Manager costs a phone 600 ms of main-thread work and 1.0 MB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

About 595 KiB of JavaScript is downloaded but never used on this page.

The page has 1,677 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

9 images could be 239 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

31 files are served with short cache lifetimes, so returning visitors download them again (230 KiB).

9 long tasks block the main thread while loading, the longest for 200 ms. During a long task the page ignores taps.

About 70 KiB of CSS is downloaded but never applied on this page.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 50 ms).

Polyfills for old browsers add 19 KiB JavaScript that modern phones do not need.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

3 KiB could be saved by minifying CSS.

The page becomes fully interactive after 26.0 s. Good is under 3.8 s.

Visually, the page fills in at 5.7 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 334 ms in total while the page loads. Good is under 200 ms.

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 124 ms to 141 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' largest content (lcp) went from 1.8 s to 1.6 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 8.7 MB in 354 requests on a phone: media 3.9 MB (1), scripts 1.9 MB (112) and images 1.4 MB (58). Under 2 MB keeps phones on slow connections fast.

1 image further down the page (113 KiB) download before anyone scrolls to it. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 2.47 g of CO₂e: 296.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

1 image has no alt text, which hurts accessibility and image search.

4 visible links have no text or label, so screen readers cannot say where they go.

Headings skip levels (h3 → h6 and h2 → h4), which makes the page harder to scan with a screen reader.

Structured data found (Organization, WebPage and WebSite) but with 1 problem, for example “Organization: url points at a different host (https://www.coravin.com.au)”.

The homepage links to 101 pages on coravin.jp and 34 external pages.

https://www.coravin.jp/collections/all, https://www.coravin.jp/collections/coravin-systems, https://www.coravin.jp/collections/coravin-pure-capsules, https://www.coravin.jp/collections/coravin-needles, https://www.coravin.jp/collections/accessories and https://www.coravin.jp/pages/trade-create-account use the same meta description. A description written for each page earns more clicks.

https://www.coravin.jp/pages/support-accessibility, https://www.coravin.jp/collections/coravin-pure-capsules, https://www.coravin.jp/pages/how-it-works, https://www.coravin.jp/pages/technology, https://www.coravin.jp/pages/industry-professionals and https://www.coravin.jp/pages/training and 2 others have under 150 words in the HTML. Thin pages rarely rank; if the text loads with JavaScript, crawlers that don't run it see even less.

https://www.coravin.jp/collections/all, https://www.coravin.jp/collections/coravin-systems, https://www.coravin.jp/collections/coravin-pure-capsules and https://www.coravin.jp/collections/accessories took over 3 s to send their HTML from our server.

We fetched 15 pages linked from your homepage (of 42 found) and read each the way a search engine does.

9 of 33 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

The page uses 2 deprecated browser APIs that will stop working in future browsers (“Fenced Frame API is deprecated and scheduled for removal.”).

1 third-party cookie is set on load; browsers are restricting these, so whatever relies on them breaks.

5 errors were logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

Chrome logged issues while loading the page (“Cookie”).

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

Social proof on the homepage: 4 testimonial or review blocks. Pairing it with named testimonials or customer logos makes it far more convincing.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

The homepage has only about 243 words of visible text; thin pages give Google and first-time buyers little to go on.

Before a visitor clicks anything, the page loads Criteo, Google Ads, Google Analytics, Google Tag Manager and Klaviyo and 2 mores (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 27 cookies, 1 of them by other companies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 49 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.