【Japan】Jewelry Brand 4℃ Breaks Free from ‘Vague Improvements’! Achieves 114% E-commerce CVR with Heatmap-Driven Rapid PDCA

Editor’s Note

This article explores the dual pillars of a “good customer experience” in e-commerce—ease of information access and a stress-free interface—as defined by an expert with extensive experience in site optimization using heatmap analytics. It highlights the inherent challenge in meeting diverse user expectations, setting the stage for a deeper discussion on practical implementation.

(左)株式会社Faber Company ミエルカ事業部 アカウントマネジメントグループ カスタマーサクセスチーム 板橋 孝平氏と(右)株式会社エフ・ディ・シィ・プロダクツ デジタルマーケティング部 部長 西川 逸人氏
Creating a ‘Good Customer Experience’ with Heatmaps

What constitutes a “good customer experience” that should be provided on an e-commerce site? Mr. Itabashi from Faber Company, who has supported site improvements for approximately 100 companies using Mieruka Heatmap, states that it must satisfy the following two criteria:
– Easy access to desired information
– Stress-free UI
However, what users seek varies widely. Even when speaking of “desired information,” it’s unclear whether it’s product specifications or pricing, and it also differs depending on whether the user has a specific item in mind or not. Furthermore, points of stress vary from person to person and by the type of product being handled, making it difficult to define “stress-free.”

“User needs are diverse and difficult to grasp.”

Forming hypotheses in such a vague state results in low accuracy and inefficiency. Mr. Nishikawa from F.D.C. Products, which operates 4℃, mentioned that while they tried various approaches at 4℃, they struggled to achieve the desired results.
At 4℃, Mr. Nishikawa’s team, responsible for the e-commerce site, handles not only site management but the entire scope of e-commerce operations, from order receipt and inventory management to picking, packing, shipping, and even post-purchase customer support (fulfillment). Consequently, there was a tendency to directly reflect customer feedback received through customer support onto the site. While this approach isn’t entirely wrong, it risks relying too much on intuition and subjectivity, lacking objectivity, or increasing disclaimers on product pages, which can dampen purchase intent.
Therefore, Mr. Nishikawa aimed to quantitatively visualize user needs and create an environment where individuals from different internal roles—such as brand managers and e-commerce staff, or creative staff and e-commerce staff—could discuss improvement strategies from the same perspective.

“I wanted to enable rapid PDCA cycles with everyone’s consensus, avoiding futile debates based on unsupported opinions like ‘this is better’ or ‘that is better.'”
“We wanted to build an organization capable of constructive discussions based on data, which led to the decision to introduce Mieruka Heatmap.” (Mr. Nishikawa)

Mieruka Heatmap primarily offers the following three functions:
Attention Heatmap: Identifies areas of thorough reading.

ユーザーのニーズは千差万別、把握することは難しい

Scroll Heatmap: Identifies drop-off points.
Click Heatmap: Identifies click locations.

“The three types of heatmaps allow for quantitative confirmation of needs.”
“Heatmap data is valuable feedback from users. They skip areas of no interest and leave if the information they want isn’t there. It’s crucial to improve the site based on user intent reflected in the data.” (Mr. Itabashi)
4℃’s Site Improvement Case Study Achieving 114% Product Purchase Rate

How did 4℃ improve its site using Mieruka Heatmap? Two specific examples were introduced.
Site Improvement Strategy 1: Revamping the Brand Top Page
While the first view remained a slideshow conveying the brand message, the area below it was significantly changed. Previously, it displayed new arrivals in order of release date under “New Arrival.” After the revamp, the New Arrival area was removed, and a “Category” section was newly established, allowing users to select categories like necklaces, rings, and pinky rings to navigate to respective listing pages.
The reason was that heatmap analysis revealed that “users on the 4℃ site wanted Category information.” On the previous top page, the Category listing page was quietly hidden within the top-left hamburger menu. Despite this, approximately 26% of all page clicks were concentrated on Category.
Given 4℃’s high gift demand, Mr. Itabashi hypothesized, “Users likely have a somewhat specific item in mind and want to choose from within that category.” Mr. Nishikawa responded, “Especially on e-commerce sites, I had a vague notion that many people search for products based on categories, like ‘let’s gift a necklace.’ The heatmap data presented clear facts, turning my assumption into conviction and enabling us to proceed with the revamp.”
As a result of adding the Category section based on heatmap data, the transition rate to each category’s listing page improved by approximately 150%, and the product purchase rate increased by about 114%.
Site Improvement Strategy 2: Pursuing Stress-Free UI Based on A/B Testing
From the beginning of 2024, Mr. Nishikawa’s team focused on “improving cart abandonment” as a major theme. While struggling to find good solutions, Mr. Itabashi used the “A/B Testing function” of Mieruka Heatmap to test various measures, also referencing competitor sites. The main ones were:

ハンバーガーメニューの中にありながらクリック率の高かったCategoryをファーストビュー直下に追加

1. Fixing the conversion point (the ‘Proceed to Order’ button) as a floating banner: Previously, users had to scroll to the bottom of the page to purchase; this was improved to allow purchase from anywhere.
2. Simplifying the first view: Temporarily removed disclaimers that had increased from a customer support perspective.
3. Removing the footer menu to eliminate exit paths to other pages: Many users left the site via the footer menu after adding items to the cart, so removing the footer prevented this drop-off.
After about two months of testing numerous approaches through A/B testing, they successfully improved the conversion rate.

“To translate data from heatmaps and A/B tests into results, you need the ability to interpret data and an organizational structure that can swiftly implement improvements. When I proposed improvement strategies in meetings, sometimes they were already reflected on the site by the end of the meeting—that’s how quickly Mr. Nishikawa and his team responded.” (Mr. Itabashi)
“Because proposals were made while showing specific data, team members were convinced. I believe that’s why we could act with speed.” (Mr. Nishikawa)
The Essential Break from ‘Vagueness’ for Accelerating PDCA

Mr. Itabashi, who advocates that “using A/B testing to speed up the D (Do: Implementation) and C (Check: Evaluation) of PDCA is important,” emphasizes that “if the P (Plan: Hypothesis Formulation) lacks evidence, it takes time to persuade superiors (stakeholders), hindering PDCA acceleration.
No matter how promising a measure seems, a hypothesis remains just a hypothesis—it’s not infallible. Nevertheless, verification incurs some cost, be it expense, time, or manpower.

“From a superior’s perspective, they want reasons justifying the cost and materials that allow them to give a convincing go-ahead.”
“Presenting reasons and evidence justifying the cost is necessary.”

Since user behavior and needs are diverse, simply copying 4℃’s improvement strategies may not lead to good results. The way to find a winning pattern is to formulate hypotheses optimal for your own company and, each time, persuade stakeholders while pushing through improvements.

“Keep in mind that you can’t move anyone with ‘vague feelings’ or ‘hunches.’ Aim to become someone who can speak with data and accelerate PDCA.” With these words, Mr. Itabashi concluded the session.
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⏰ Published on: July 04, 2025