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Is “Design” the Reason Your E-Commerce Site’s Sales Aren’t Growing? Design Thinking for Sustained Sales Growth

Last updated:July 30, 2026

Is “Design” the Reason Your E-Commerce Site’s Sales Aren’t Growing? Design Thinking for Sustained Sales Growth

Hello, this isKototsuki Design.

When it comes to running an e-commerce site (online store), the most straightforward performance metric is “sales.” If the numbers go up, it’s a success; if they don’t, it’s a failure—we tackle website development every day in a world where things are often viewed this way.

However, after working in this field for a long time, there comes a moment when you notice something doesn’t quite feel right.

Even though the numbers are growing, there’s a sense of unease. It feels as though, even while sales are up, the brand is gradually losing its luster.

In this article, we’ll reexamine whether “chasing sales” is the only right answer for e-commerce sites and explain an approach to site design that looks beyond sales.

If you’d like to get a big-picture view of e-commerce sites, please start by reading this summary article on the types of e-commerce sites and how to choose one

E-commerce sales are the “result”; what’s important is designing “how” you sell

売上は「結果」であり、「売れ方」こそが設計のイメージ

Of course, sales are important. To keep the business running, you can’t afford to ignore them.

However, the more successful an e-commerce site is, the more carefully it designs “why and how sales were made” rather than focusing solely on “sales figures themselves.” This is because numbers accumulated by ignoring the “quality” of sales will inevitably plateau at some point. And when that happens, it’s not uncommon to find that neither the brand nor the customer base remains.

Short-Term “Manipulation” vs. Long-Term “Value”

I believe there are two broad categories of sales.

There are figures generated by temporary “manipulation,” and figures that grow over time as a result of careful “design.”

Points of Comparison

Short-Term Sales (Advertising & Campaigns)

Long-Term Value (Branding)

Main Methods

Advertising, limited-time sales, discounts

Content, brand identity, customer experience

Characteristics

Provides immediate results, but stops as soon as you stop.

Takes time, but builds up as an asset.

User Motivation

“It’s cheap” or “It’s a limited-time offer”

“I want to buy this because it’s from this store”

Examples

today’s snack, sold with flashy promotions

The trust embodied in “Ubaga Mochi,” loved for 400 years

The difference between short-term sales and long-term brand value

E-commerce sales can be broadly divided into two categories.

Points of Comparison

Short-Term Sales (Advertising & Promotions)

Long-Term Value (Branding)

Main Methods

Advertising, limited-time sales, discounts

Content, brand identity, customer experience

Characteristics

Provides immediate results, but stops when discontinued

Takes time but builds up as an asset

User Motivation

“It’s cheap” or “It’s a limited-time offer”

“I want to buy this because it’s from this store”

If sales stop the moment you stop advertising, your business is in an unstable state. Brands that continue to be chosen even as times change have built “trust” over time—not just through discounting. E-commerce site design requires creating value that accumulates over time, rather than relying entirely on short-term tactics.

E-commerce Site Design Changes Based on “Who You’re Selling To”

「誰に売るか」「誰に選ばれるか」で、売り方そのものが変わるのイメージ

The era of “selling by offering a wide selection of good products at low prices” is over. Even for the same products, the design required for a site varies significantly depending on who you’re targeting and the circumstances in which you want to reach them.

Target Audience and Context

Required Design Approach

We want them to buy right now, no matter what

LP-style design that appeals to impulse and emotion

Want to deliver it as a gift for a special occasion

Information-based design that prioritizes reassurance and satisfaction

We want customers to connect with the creator’s passion

Brand-oriented design that emphasizes storytelling

Furthermore, today’s consumers base their decisions not only on specifications and price but also on “who they’re buying from.” When differences become harder to discern the more they compare, people ultimately choose based on “who they trust.” Users are constantly searching for reasons to buy that cannot be measured by price or features alone.

Two Warning Signs Even When Sales Are Rising

Even if sales are on an upward trend, your e-commerce business cannot be considered healthy if it exhibits the following conditions:

  • Unprofitable sales
    : Sales figures are moving, but no actual profit is being generated
  • Reliance
    on Discounts: You’re attracting only customers who say, “I won’t buy it unless it’s cheap,” causing your brand value to erode.

What E-commerce Site Design Really Controls

The role of design on an e-commerce site isn’t just to make the “Buy Now” button stand out. Design doesn’t determine “sales” themselves—it determines “how sales are made.”

The Desired Way of Selling

Examples of Design-Driven Approaches

Selling Through Trust

Neat fonts and white space that convey sincerity

Selling Through a Unique Aesthetic

Photography and layout that convey the texture of materials and the creator’s vibe

Selling Through Approachability

Bright color schemes and soft typography that conveys warmth

The essential role of e-commerce site design is to visually refine the sales experience by empathizing with the user’s situation—so they’ll think, “I want to buy from these people.” If you focus solely on numbers, you risk sacrificing the brand’s warmth and your relationship with customers.

Operate Based on “Decision-Making Criteria,” Not Just Numbers

Sales and CVR (conversion rate) are important metrics. However, if you base operational decisions solely on them, you’ll be pulled toward short-term optimization. E-commerce sites that consistently deliver results have “decision-making criteria” in place before they even look at the numbers.

Decision-Making Situations

Choices Based Solely on Numbers

Choices Based on Decision-Making Criteria

Should we offer a discount?

Do it because it sells

Decide based on whether it damages the brand

Should we increase advertising?

If it boosts sales, we’ll increase it

We decide based on whether it leads to repeat business

Should we add more products?

Add them if they’re likely to sell

Decide based on whether it disrupts the site’s overall theme

Numbers reflect past results, but the criteria you use determine the future of your business.

Real-world example: The decision to deliberately discontinue a best-selling product

An e-commerce site once carried a product that “contributed to sales but didn’t align with the brand’s vision.” While it supported sales figures in the short term, customers who visited specifically for that product tended not to show interest in other items and would leave without making repeat purchases.

Consequently, we decided to remove those products from our lineup. As a result, sales dipped temporarily, but the site subsequently became a space where only the “customer segment we truly wanted to reach” felt comfortable, and the repeat purchase rate improved noticeably.

Should we prioritize short-term sales or long-term customer relationships? The ability to make this choice intentionally determines the strength of an e-commerce site as a business.

Designing the “post-purchase” experience determines repeat purchase rates

The real test for an e-commerce site doesn’t end the moment a purchase is completed. The strength of the business is determined by whether customers “will buy again” and whether they “will recommend it to others.”

Touchpoints

Design That Ends as a Task

Experience Design That Nurtures Relationships

Order Confirmation Email

Mechanical, automated notifications

Wording that builds anticipation until arrival

Packaging and Included Items

Efficiency-Focused, Bureaucratic Packaging

Thoughtful touches like the joy of unboxing and handwritten cards

Follow-up

A “sell-and-forget” approach

Touchpoints for maintaining the relationship, such as care instructions

E-commerce sites with weak post-sale strategies are like buckets with holes—they must constantly spend large amounts on advertising to acquire new customers. It’s important to design an e-commerce site not merely as a system, but as a means of human-to-human communication.

An e-commerce site is not just a “place to sell,” but a “place to communicate”

Today’s e-commerce sites are not mere sales catalogs. They are, in a sense, a form of “media” where purchases are made only after products are compared, researched, and the customer is fully convinced.

The background of the product, the creator’s vision, and the story of how to use it for the long term—as these elements accumulate as content, a “product you can buy anywhere” transforms into a “product you want to buy here.” Sales can only be achieved through the accumulation of information and trust.

In practice, a common disconnect arises where advertising agencies and consultants aim to maximize “sales (numbers),” while in-house staff strive to preserve “brand identity.” Neither approach is wrong, but because they are focused on different goals, if left unaddressed, this can result in a site that “sells well but doesn’t feel like us.”That is precisely why it’s crucial to establish a common set of decision-making criteria from the outset—one that everyone involved can refer back to.

Frequently Asked Questions (FAQ)

Q. What is the main reason why sales on e-commerce sites aren’t growing?

A. There are various causes, but in many cases, the root cause is not just a lack of traffic but the fact that “there is no reason for customers to choose the site other than price.” Branding through design and content—which makes customers choose your site without relying on discounts—is crucial.

Q. What is the difference between branding and design?

A. Design is a means of refining appearance and usability, while branding is the process of defining the very reason “why” a brand is chosen. On an e-commerce site, design serves the role of visually expressing that branding.

Q. Is it possible to enhance brand value without sacrificing sales?

A. Yes, it is possible. However, in the short term, sales figures may temporarily decline as customers who rely on discounts drift away. In the long term, this often leads to higher repeat purchase rates and increased average order value, so it’s important to proceed systematically after the team has agreed on the decision-making criteria.

Q. When is the right time to consider a site redesign?

A. If you recognize any of the following situations—such as “We’re generating sales but not turning a profit,” “We can’t sell without discounts,” or “We can’t articulate why customers choose us”—it’s time to reevaluate your design and user flow.

Summary | E-commerce Site Sales Checklist

A good e-commerce site isn’t just a vending machine where the process ends once a product is sold; it’s a platform designed to deliver value and cultivate relationships with customers after the purchase.

  • Focus on cultivating long-term value, not just short-term numbers
  • Use design to clearly communicate why customers should buy from you
  • Operate based on decision-making criteria rather than just numbers
  • Prioritize the post-purchase experience
  • Design it not just as a sales channel, but as a “communication medium”

Use the checklist below to assess the current state of your company’s e-commerce site.

  • □ When sales increase, can you explain the reason in your own words?
  • □ Beyond promotions and sales events, there are reasons why customers choose your site
  • □ Customers say, “I want to buy from you,” rather than just focusing on product specifications
  • □ You’ve intentionally designed the experience that follows a purchase
  • □ Decision-making criteria for when customers are undecided are shared within the team

If any of these items are unclear, that’s where your site has room to grow. If you can nod in agreement to all of them without hesitation, then your e-commerce site likely already has a “structure for sustained sales” firmly in place.


If you’re looking to explore a delivery method that truly reflects your company’s identity, please consult with us atKototsuki Design. Before we even discuss technology or systems, we’ll start by working together to articulate “what kind of business you want to be.”

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