k2cstore.com website review

8 images could be 278 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 750 ms faster on a phone.

Your mobile performance score is 66. Pages that score under 90 lose visitors before the first paint.

About 95 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 450 ms faster on a phone.

2 files block the first paint until they finish downloading. Deferring or inlining them could save about 350 ms.

About 28 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 150 ms faster on a phone.

1 long task block the main thread while loading, the longest for 104 ms. During a long task the page ignores taps.

4 third-party services load with your homepage (Shopify, useamp.com and makip.co.jp and others), adding 189 KiB and 76 ms of main-thread time.

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.

1 file is served with short cache lifetimes, so returning visitors download them again (1 KiB).

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Your largest element takes 12.4 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

The page becomes fully interactive after 12.4 s. Good is under 3.8 s.

Visually, the page fills in at 7.7 s (Speed Index). Good is under 3.4 s.

Real visitors wait 853 ms for your server to start answering (75th percentile). Good is under 800 ms.

The first text or image appears after 2.0 s on a phone. Good is under 1.8 s.

2 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 95 ms to 113 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 1.0 s to 1.1 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 2.9 MB in 125 requests on a phone: fonts 1.2 MB (2), images 675 KiB (25) and other files 628 KiB (61). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 0.82 g of CO₂e: 99.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

ARIA attributes must conform to valid values: 1 element on the page fails this check, rated critical by axe-core.

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

7 elements hidden from screen readers can still receive keyboard focus.

All page content should be contained by landmarks: 2 elements on the page fail this check, rated moderate by axe-core.

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

Headings should not be empty: 6 elements on the page fail this check, rated minor by axe-core.

Headings skip levels (h1 → h3 and h2 → h4), which makes the page harder to scan with a screen reader.

Your title is only 28 characters: “K2C｜講談社ファンコマースサイト – K2CSTORE”. Between 30 and 65 characters leaves room to say what you do and for whom.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

There are 2 <h1> headlines (“K2CSTORE” and “K2CSTORE”). One clear main headline is easier for people and search engines.

The homepage links to 106 pages on k2cstore.com and 3 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

https://k2cstore.com/collections/book, https://k2cstore.com/collections/goods, https://k2cstore.com/collections/contents, https://k2cstore.com/collections/subscription, https://k2cstore.com/collections/k-comic and https://k2cstore.com/pages/about and 3 others have no meta description, so Google writes the search snippet from whatever text it finds.

https://k2cstore.com/pages/about has no <h1> headline, so visitors and search engines get no clear main topic.

https://k2cstore.com/collections/book, https://k2cstore.com/collections/subscription, https://k2cstore.com/collections/gorogoro-boutique, https://k2cstore.com/collections/bom-bom-academy, https://k2cstore.com/collections/k-comic and https://k2cstore.com/pages/about and 3 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.

We fetched 15 pages linked from your homepage (of 48 found) and read each the way a search engine does.

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

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

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

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 55 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 Analytics, Google Tag Manager and Meta Pixel (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 11 cookies (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 12 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.