OneProof: The Quiet Force Behind Winning E-Commerce
Izumi Hirayama, CEOOneProof was purpose-built to navigate these complexities and help global brands translate intent into impact in the Japanese market.
“Data is the real game-changer in Japan’s e-commerce landscape. By analyzing trends platforms don’t share, we help brands make smarter decisions in real time”
From storefront management on Rakuten, Yahoo! Shopping and Amazon Japan to sales strategies tailored to local sensibilities, OneProof brings clarity to a complex landscape. It interprets platform algorithms, refines product messaging and ensures every touchpoint feels native to local consumers.
“E-commerce is about access, connection and opportunity,” says Izumi Hirayama, CEO. “Whether expanding a brand’s presence or helping consumers discover products they never knew existed, our goal is to unlock new forms of value—for everyone.”
Setting OneProof apart is its commitment to long-term growth for brands. Beyond technical execution, it offers strategic partnerships. Every solution, from logistics and fulfillment to customer experience and performance marketing, is designed to scale sustainably. OneProof provides access to a network of experienced e-commerce professionals, helping brands build the right local team without guesswork.
Executing Smart Sales Strategies
OneProof takes the lead role in helping brands succeed in Japan’s complex digital retail environment, combining data-driven strategy with hands-on execution.
Every success story starts with a clear, customized sales plan. It works closely with each client to develop strategies aligned with product characteristics, business goals and measurable performance metrics. Every brand faces different challenges in growing its e-commerce business and each product requires its own sales promotion method. OneProof adapts its approach to suit varying conditions, whether tied to specific ASPs or shopping malls.
“The first step is understanding the market. Japan’s e-commerce ecosystem is heavily skewed toward major marketplaces. Shopping activity is nearly three times higher on these platforms than on standalone brand websites. Choosing the right one isn’t optional—it’s fundamental,” says Takahiro Nakamura, director.
OneProof pinpoints where a product is most likely to succeed, outlining which platforms to prioritize, how to optimize for visibility and what drives conversions for each audience.
Japan’s top shopping sites serve distinct customer segments.
Rakuten, for example, caters to impulse-driven buyers who respond to visually rich promotions and emotionally resonant storytelling. Food, fashion and beauty brands thrive here when messaging evokes delight or indulgence.
Amazon Japan draws pragmatic, price-conscious shoppers focused on targeted searches and detailed comparisons.
Success in categories like electronics or appliances depends on sharp pricing, data-driven positioning and automation.
OneProof’s ability to interpret these subtle behavioral differences sets it apart.
From strategy to execution, OneProof delivers fullscale, e-commerce operations. Dedicated teams manage storefronts, logistics, warehouse coordination, order fulfillment, customer care and performance marketing. With more than 100 storefronts under monthly management, OneProof operates at the pace of Japan’s ever-evolving market—where agility and accuracy are vital.
Once sales traction is established, the next step is loyalty.
OneProof helps brands launch custom domain stores to deepen relationships with high-value buyers. Campaigns such as exclusive launches, VIP events and loyalty rewards build brand affinity and increase lifetime value.
OneProof stands out most in its access to proprietary, real-time consumer data—insights Rakuten and Amazon Japan don’t make public. Brands can track competitor trends, test ad creatives, fine-tune pricing and optimize offers based on demand signals.
“Data is the real game-changer in Japan’s e-commerce landscape,” says. Hiroshi Miyazaki, division director.
“By analyzing trends platforms don’t share, we help brands make smarter decisions in real time.”
Beyond execution, OneProof provides continuous feedback to align businesses with evolving expectations. Japanese consumers now expect next-day delivery, high-touch support and frictionless checkout. Companies that meet these standards strengthen customer loyalty and sustain long-term growth.
With around 20 years of experience, OneProof does more than help brands enter the Japanese market—it helps them grow with confidence.
Walking the Talk
Leading brands across multiple industries trust OneProof to navigate Japan’s complex e-commerce landscape and drive sustained growth. From sportswear and outdoor gear to home appliances and premium food brands, OneProof’s expertise spans categories that require constant customer acquisition rather than relying on repeat purchases.
It is a key e-commerce partner for brands such as De' Longhi, Under Armour, Millet Mountain Group, Miele, Mitsubishi Chemical Cleansui and Garmin. Each partnership is built on customized strategies, data-driven execution and hands-on operational management tailored to Japan’s highly competitive online market.
OneProof has been working with Under Armour, supporting its e-commerce operations from launch to long-term growth. The collaboration began with establishing the brand’s presence on Japan’s major shopping platforms, ensuring product positioning, and engagement strategies aligned with local consumer behavior.
From there, continuous monthly e-commerce consulting, sales strategy development and operational management were provided. By leveraging real-time purchasing insights and platform-specific optimization techniques, OneProof helped Under Armour navigate Japan’s competitive sportswear market while maximizing conversions and expanding its customer base.
In another instance, a major beverage manufacturer and an apparel brand turned to OneProof to power its official Rakuten market in Japan. Operating on Rakuten requires more than simply listing products—it demands strict alignment with Rakuten Merchant Server (RMS) specifications, which govern how stores are structured, updated and optimized.
OneProof became a trusted partner, managing the entire store development and operations lifecycle.
OneProof’s ability to interpret these subtle behavioral differences sets it apart.
From strategy to execution, OneProof delivers fullscale, e-commerce operations. Dedicated teams manage storefronts, logistics, warehouse coordination, order fulfillment, customer care and performance marketing. With more than 100 storefronts under monthly management, OneProof operates at the pace of Japan’s ever-evolving market—where agility and accuracy are vital.
Once sales traction is established, the next step is loyalty.
OneProof helps brands launch custom domain stores to deepen relationships with high-value buyers. Campaigns such as exclusive launches, VIP events and loyalty rewards build brand affinity and increase lifetime value.
OneProof stands out most in its access to proprietary, real-time consumer data—insights Rakuten and Amazon Japan don’t make public. Brands can track competitor trends, test ad creatives, fine-tune pricing and optimize offers based on demand signals.
“Data is the real game-changer in Japan’s e-commerce landscape,” says. Hiroshi Miyazaki, division director.
“By analyzing trends platforms don’t share, we help brands make smarter decisions in real time.”
Beyond execution, OneProof provides continuous feedback to align businesses with evolving expectations. Japanese consumers now expect next-day delivery, high-touch support and frictionless checkout. Companies that meet these standards strengthen customer loyalty and sustain long-term growth.
With around 20 years of experience, OneProof does more than help brands enter the Japanese market—it helps them grow with confidence.
Walking the Talk
Leading brands across multiple industries trust OneProof to navigate Japan’s complex e-commerce landscape and drive sustained growth. From sportswear and outdoor gear to home appliances and premium food brands, OneProof’s expertise spans categories that require constant customer acquisition rather than relying on repeat purchases.
It is a key e-commerce partner for brands such as De' Longhi, Under Armour, Millet Mountain Group, Miele, Mitsubishi Chemical Cleansui and Garmin. Each partnership is built on customized strategies, data-driven execution and hands-on operational management tailored to Japan’s highly competitive online market.
OneProof has been working with Under Armour, supporting its e-commerce operations from launch to long-term growth. The collaboration began with establishing the brand’s presence on Japan’s major shopping platforms, ensuring product positioning, and engagement strategies aligned with local consumer behavior.
From there, continuous monthly e-commerce consulting, sales strategy development and operational management were provided. By leveraging real-time purchasing insights and platform-specific optimization techniques, OneProof helped Under Armour navigate Japan’s competitive sportswear market while maximizing conversions and expanding its customer base.
In another instance, a major beverage manufacturer and an apparel brand turned to OneProof to power its official Rakuten market in Japan. Operating on Rakuten requires more than simply listing products—it demands strict alignment with Rakuten Merchant Server (RMS) specifications, which govern how stores are structured, updated and optimized.
OneProof became a trusted partner, managing the entire store development and operations lifecycle.
The team built a storefront that captured the brand’s high-energy identity while meeting the technical requirements of Rakuten’s ecosystem. This included custom page design, front-end development, back-end configuration, seamless RMS integration and ongoing compliance with platform updates.
The focus extended beyond functionality. OneProof applied responsive coding, JavaScript-based enhancements and SEO strategies tailored to Rakuten’s search behaviors—ensuring the store remained visible and fast-performing. Every design choice and technical adjustment reinforced the brand’s presence while delivering a smooth user experience.
On the operational side, internal teams were relieved of handling daily tasks. OneProof took on tracking performance, updating content, monitoring inventory and adapting swiftly to platform changes. The team also supported the brand’s direct-to-consumer efforts with fulfillment services that enabled timely, accurate delivery and strong post-purchase engagement.
Combining creative execution with technical precision, OneProof transformed the Rakuten storefront into a scalable, always-on sales engine. The result shows how deep platform expertise and end-to-end support can bring a global brand’s local e-commerce presence to life—efficiently, consistently and on-brand.
Driving E-Commerce Growth in Japan and Beyond
OneProof’s expertise has earned it industry-wide recognition. Certified by Rakuten Service Square and recognized as a Yahoo! Japan commerce partner, the company ranks among Japan’s Top 50 professional e-commerce support firms. Its reputation stems from a strong track record combining deep platform knowledge with hands-on operational execution.
While consumer e-commerce often grabs headlines, Japan’s largest online segment is business-to-business (B2B), representing a 460 trillion yen market. As B2B transactions drive the next wave of digital trade, OneProof is at the forefront, helping companies build high-performance storefronts, streamline fulfillment and expand their digital reach. Its B2B-specific services include custom integrations, platform development and operational strategies that increase transparency and efficiency across the supply chain.
Cross-border commerce is another fast-growing opportunity, especially between Japan, the U.S. and Asia. Global demand for Japan-exclusive goods—such as anime merchandise and character products—continues to rise. OneProof supports this growth through localization services, multilingual storefronts and targeted marketing strategies tailored to each market. Clients benefit from broader visibility and smoother navigation of cross-border logistics and compliance challenges.
Japan’s e-commerce landscape has shifted significantly since the COVID-19 pandemic. Online demand surged across product categories such as home appliances, interior goods and packaged foods. OneProof excels in these sectors, helping brands adapt quickly to changing buyer behaviors through data-driven merchandising, UX design and marketplace positioning.
With a forward-looking mindset and proven results, OneProof goes beyond service delivery. It acts as a growth catalyst—enabling businesses to adapt, innovate and lead in a digital-first economy. As Japan’s online market evolves, those prioritizing agility, insight and execution will stay ahead.
OneProof is ready to take them there.
The focus extended beyond functionality. OneProof applied responsive coding, JavaScript-based enhancements and SEO strategies tailored to Rakuten’s search behaviors—ensuring the store remained visible and fast-performing. Every design choice and technical adjustment reinforced the brand’s presence while delivering a smooth user experience.
E-commerce is about access, connection and opportunity. Whether expanding a brand’s presence or helping consumers discover products they never knew existed, our goal is to unlock new forms of value—for everyone
On the operational side, internal teams were relieved of handling daily tasks. OneProof took on tracking performance, updating content, monitoring inventory and adapting swiftly to platform changes. The team also supported the brand’s direct-to-consumer efforts with fulfillment services that enabled timely, accurate delivery and strong post-purchase engagement.
Combining creative execution with technical precision, OneProof transformed the Rakuten storefront into a scalable, always-on sales engine. The result shows how deep platform expertise and end-to-end support can bring a global brand’s local e-commerce presence to life—efficiently, consistently and on-brand.
Driving E-Commerce Growth in Japan and Beyond
OneProof’s expertise has earned it industry-wide recognition. Certified by Rakuten Service Square and recognized as a Yahoo! Japan commerce partner, the company ranks among Japan’s Top 50 professional e-commerce support firms. Its reputation stems from a strong track record combining deep platform knowledge with hands-on operational execution.
While consumer e-commerce often grabs headlines, Japan’s largest online segment is business-to-business (B2B), representing a 460 trillion yen market. As B2B transactions drive the next wave of digital trade, OneProof is at the forefront, helping companies build high-performance storefronts, streamline fulfillment and expand their digital reach. Its B2B-specific services include custom integrations, platform development and operational strategies that increase transparency and efficiency across the supply chain.
Cross-border commerce is another fast-growing opportunity, especially between Japan, the U.S. and Asia. Global demand for Japan-exclusive goods—such as anime merchandise and character products—continues to rise. OneProof supports this growth through localization services, multilingual storefronts and targeted marketing strategies tailored to each market. Clients benefit from broader visibility and smoother navigation of cross-border logistics and compliance challenges.
Japan’s e-commerce landscape has shifted significantly since the COVID-19 pandemic. Online demand surged across product categories such as home appliances, interior goods and packaged foods. OneProof excels in these sectors, helping brands adapt quickly to changing buyer behaviors through data-driven merchandising, UX design and marketplace positioning.
With a forward-looking mindset and proven results, OneProof goes beyond service delivery. It acts as a growth catalyst—enabling businesses to adapt, innovate and lead in a digital-first economy. As Japan’s online market evolves, those prioritizing agility, insight and execution will stay ahead.
OneProof is ready to take them there.
