Senior Product Designer in Japan
I design fintech, e-commerce, and consumer products at Paidy, Philip Morris Japan, and Rakuten—turning complex journeys into clear experiences.
Selected results: 61% more Passkey adoption and 15.28% higher e-commerce conversion.
Selected Product Design
PAIDY · AUTHENTICATION & EXPERIMENTATION
Increasing Passkey Adoption
Designed progressive onboarding and evaluated it with approximately 10,000 existing users before a staged rollout. Adoption increased by 61% and SMS costs decreased by 30%.
PAIDY · DASHBOARD & COMPONENT DESIGN
Redesigning the Merchant Dashboard
Translated feedback from ten merchants into clearer navigation, dashboard hierarchy, and reusable UI components. The refined design received a 4.5/5 satisfaction rating.
PAIDY · PROCESS LEADERSHIP
Creating a Shared UX Validation Framework
Established a shared validation process with Design, Product, and Engineering. Piloted through one project per designer before wider team adoption.
Consumer Product Design
PHILIP MORRIS JAPAN · RESEARCH & UI DESIGN
Localizing IQOSPHERE for Japan
Used NPS reports, surveys, and member segmentation to shape a localized web and LINE experience, supported by high-fidelity prototypes and reusable components.
Earlier Product Work — Rakuten
Rakuten Travel
Simplified the search and booking journey, reduced navigation friction, and achieved an 8.3-point improvement in System Usability Scale during usability testing.
Weekend+
Led the experience from discovery research and design-sprint facilitation through prototyping and delivery, helping launch a new mobile travel-planning experience in 2019.
I enjoy solving complex product problems where user behavior, business goals, and technology intersect.
If you're building products that require thoughtful UX strategy and measurable impact, I'd love to connect.