Hi, I'm Yusei.

I design products with

system.

A product designer in Japan with a soft spot for simplicity and a genuine curiosity for how people see and move through the world.

Currently designing for a Japan-native BtoB AI SaaS product.

Selected work

Why does good design fail when it crosses cultures?

Led the end-to-end localization design strategy, redesigning the product page through information architecture and UI design that earned the trust of Japanese consumers.

Why does good design fail when it crosses cultures?

Led the end-to-end localization design strategy, redesigning the product page through information architecture and UI design that earned the trust of Japanese consumers.

What happens when a device outlives its own software?

With a focus on restoring unsupported smart devices, I designed the end-to-end MVP of a sous vide cooking app.

What happens when a device outlives its own software?

With a focus on restoring unsupported smart devices, I designed the end-to-end MVP of a sous vide cooking app.

Don't make them wait twice! Rethinking device replacement

Designed the MVP of a next-day replacement service with the goal of improving the experience for users who received faulty devices.

Preview

Don't make them wait twice! Rethinking device replacement

Designed the MVP of a next-day replacement service with the goal of improving the experience for users who received faulty devices.

Preview

Reducing workflow interruptions by enabling seamless communication across tools

Co-designed a B2B chat platform MVP from the ground up to address internal communication challenges.

Preview

Reducing workflow interruptions by enabling seamless communication across tools

Co-designed a B2B chat platform MVP from the ground up to address internal communication challenges.

Preview

Skills I'm equipped with

UI/UX Architecture

Prototyping

Stakeholder Alignment

UX Writing

Web Design

Component Architecture

UX Research

Data Analysis

Mobile App Design

Design Philosophy

Most design problems aren't what they appear to be. I spend a lot of time before the first frame — understanding what's actually being asked, what needs to hold up over time, and what the work needs to accomplish beyond looking good. The goal is always the same: make something complex feel simple.

Philosophy 01

Philosophy 02

Philosophy 03

Design Tied to Outcomes.

I think in terms of business value, not just visual quality. A beautiful screen that doesn't move a metric is a missed opportunity.

Systems, Not Just Screens.

I design with the second and third use case in mind — so the tenth feature costs less than the first, not more.

Solve the Right Problem.

Not as a reflex, but as a discipline. The cost of mistranslating the problem is higher than the cost of any design decision downstream.

Design Tied to Outcomes.

I think in terms of business value, not just visual quality. A beautiful screen that doesn't move a metric is a missed opportunity.

Systems, Not Just Screens.

I design with the second and third use case in mind — so the tenth feature costs less than the first, not more.

Solve the Right Problem.

Not as a reflex, but as a discipline. The cost of mistranslating the problem is higher than the cost of any design decision downstream.

I've worked with

SolvifAI

Product Designer

2026 - Now

Back Market

Product Designer

2022 - 2025

Cybozu

Product Designer

2023 - 2024

PICKL

Product Designer

2021 - 2022

Humble Bunny

Marketer / Design Specialist

2021 - 2022

Anker Japan

Marketer

2019 - 2020

About

Hi, I'm Yusei. A digital product designer based in Japan. I'm currently based in Matsuyama, my hometown, living with a wife and a dog. Growing up, I always liked things that are beautiful and functional like a good rain jacket that keeps the rain out but still makes you feel good wearing it.

I'm not usually the loudest person in the room. I like to listen before I speak and think before I raise my hand. Design is similar in that sense to me. I think it's one of the quieter ways to change how people experience their day. Not dramatically. Just a little better, a little clearer.

Hit me up on LinkedIn - or email, if you are not about that social media life :D) - I'd love to learn more about you too.

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