supernote.jp website review

About 1,016 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 3.7 s faster on a phone.

hcaptcha.com costs a phone 1.5 s of main-thread work and 1.2 MB of downloads while your page loads. That alone is enough to make taps feel slow. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

Your mobile performance score is 11. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 6.5 s on main-thread work while loading, 3.6 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (hcaptcha.com, YouTube and Google Tag Manager and others), adding 20.6 MB and 2.6 s of main-thread time.

Shopify costs a phone 197 ms of main-thread work and 18.2 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.

6 files are served with short cache lifetimes, so returning visitors download them again (118 KiB).

YouTube costs a phone 704 ms of main-thread work and 988 KiB 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.

18 long tasks block the main thread while loading, the longest for 671 ms. During a long task the page ignores taps.

8 files block the first paint until they finish downloading. Deferring or inlining them could save about 450 ms.

About 110 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 300 ms faster on a phone.

Polyfills for old browsers add 14 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 150 ms faster on a phone.

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

1 image could be 23 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

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.

2 KiB could be saved by minifying CSS.

Your largest element takes 125.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Supernote Manta (10.7 インチ) 思考の海に、深く、潜る ￥76980 から 詳細 購入”.

Visually, the page fills in at 33.5 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 133.4 s. Good is under 3.8 s.

The first text or image appears after 6.2 s on a phone. Good is under 1.8 s.

The layout shifts by 0.446 while loading, so content jumps under the reader's thumb. Good is under 0.1.

Scripts block taps and scrolling for 1.2 s 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 103 ms to 99 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 1.4 s to 1.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 25.5 MB in 236 requests on a phone: fonts 21.4 MB (14), scripts 2.5 MB (97) and HTML 689 KiB (6). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 7.23 g of CO₂e: 867.5 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

5 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Elements with role="dialog" or role="alertdialog" do not have accessible names. (1 element).

Your title is only 26 characters: “Homepage – Supernote Japan”. Between 30 and 65 characters leaves room to say what you do and for whom.

There are 54 <h1> headlines (“”, “The E-notebook with” and “Elegant productivity”). One clear main headline is easier for people and search engines.

The homepage links to 28 pages on supernote.jp and 18 external pages.

There is no https://supernote.jp/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

We fetched 15 pages linked from your homepage (of 19 found) and read each the way a search engine does.

5 of 12 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

5 third-party cookies are set on load; browsers are restricting these, so whatever relies on them breaks.

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.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

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 38 words of visible text; thin pages give Google and first-time buyers little to go on.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

Before a visitor clicks anything, the page loads Google Ads, Google Tag Manager, Meta Pixel and X (Twitter) Ads (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 12 cookies, 3 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 19 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.