Japan Market Research for Korean Brands: What to Check Before Launch

Define the decision before measuring market size

Before collecting data, define what the research needs to decide. Choosing the first SKUs, setting a Japan retail price, or selecting between ecommerce, wholesale and pop-ups each requires different evidence. Research that starts without a decision question often produces more information without producing a usable market-entry choice.

METI's FY2024 E-Commerce Market Survey reported a Japan B2C ecommerce market of JPY 26.1 trillion in 2024 and a B2C ecommerce ratio of 9.8%. Macro data like this is useful for understanding the scale and direction of the market, but it does not show whether a specific product will sell. Use it as the starting layer, then narrow the research to product-level competition, pricing and customer behavior.

Research purchase situations, not only age groups

A segment such as 'women in their twenties' is usually too broad to determine a product page or sales channel. Build a hypothesis around who needs the product, in what situation, what alternatives they compare, where they look for information and what would stop the purchase. The relevant friction differs by category: size and fit for fashion, use and ingredients for beauty, or use case and delivery conditions for other products.

Japan's Statistics Bureau continuously publishes household and online-shopping results through its Survey of Household Economy. Use public statistics for the broad consumption pattern, then use Japanese marketplaces, search results, social media, stores and reviews to understand the specific purchase situation for the category.

Compare competitor pricing, merchandising and reviews on the same basis

Do not limit the competitor set to other Korean brands. Include the products a Japanese shopper would realistically compare in the same purchase situation, such as established Japanese brands, local DTC brands and top marketplace products.

The goal is not simply to list differences. Use the comparison to determine whether the product can create a reason to be chosen in Japan. Design, sizing, materials, delivery, returns, explanation, reviews and UGC can all matter even when the product cannot win on price alone.

Check how the competitive environment changes by channel

Competition looks different on a DTC store, marketplaces such as Amazon, Rakuten or Qoo10, wholesale retail floors and a pop-up. Marketplaces make price and reviews easy to compare, while DTC requires the brand to create understanding and traffic. Wholesale adds retailer buying conditions, and pop-ups add location and reasons to visit.

You do not need to research every channel in depth. Shortlist two or three routes and compare competitor density, price bands, review volume, merchandising and commercial conditions. Separating where customers discover, try and buy the product helps define the role of each launch channel.

Include regulation, logistics and margin in the market-research stage

A product can show demand and still be a poor first launch candidate if it cannot meet Japan selling requirements, leaves no margin after logistics, or creates an unworkable returns and Japanese-support burden. For the leading SKUs, estimate labeling and regulatory checks, import route, international shipping, domestic delivery, returns and payment costs before the final go/no-go decision.

When a local entity, office, visa or other establishment question becomes relevant, use primary guidance such as JETRO's Invest Japan and business starter materials. For an early market test, keep the entity decision separate from the question of which seller and logistics setup can validate demand most efficiently.

Finish with a small sales test that can validate the assumptions

Public data and competitor research cannot determine the real conversion rate, inquiry mix, sizing concerns, return reasons or contribution margin for the brand. Once desk research has narrowed the options, collect real behavior at a small scale.

1. 01
   Build the hypothesis

   Use public data, search, competitors, pricing and reviews to define the first product, customer, price and channel assumptions.

2. 02
   Collect pre-purchase signals

   Use a Japan-localized product page, UGC, buyer conversations or a pop-up to observe clicks, inquiries, try-on reactions and comparison reasons.

3. 03
   Decide from purchase data

   Run a small ecommerce, wholesale or pop-up test and use purchases, margin, inquiries and returns to choose what to expand next.

Do not judge the test on revenue alone. Track product-page drop-off, inquiries, reviews, return reasons and channel-level margin so that the next decision can identify whether the product, price or channel needs to change.

Turn the research into a one-page decision sheet

The useful output is not a thicker research deck. Put the decisions needed for the next action on one page, and assign an owner and next check to anything still unresolved.

• First SKUs for Japan
• Target customer and purchase situation
• Main competitors and Japan price range
• Purchase reasons and concerns found in reviews
• Initial sales channel
• Regulation, labeling, import and logistics status
• Estimated margin and required sales volume
• Next validation test and KPIs