Khang Hy
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Design & system workChildcare · Japan

A short-video app for Japanese parents, designed from a pile of image collages.

The client came with scattered references, not a product vision. As the only designer for six months, I turned them into a mobile app and a web admin that shipped on the App Store and Google Play in Japan.

Illustration: a fan of short-video cards
Role
Sole designer
Team
1 Flutter dev, 2 backend devs
Timeline
6 months
Platform
iOS, Android, web admin
Status
Live in Japan
The problem

Scattered ideas, a hard deadline, a market abroad.

The goal was simple: help young parents learn about childcare through short video. The inputs were not.

  • 01Scope creepNew requests kept arriving, and the 6-month deadline was the first thing at risk.
  • 02Designing from abroadDesigning from Vietnam for Japanese parents, so research had to work remotely.
  • 03A cultural gapI had to read Japanese childcare habits and UI expectations without field research.
From collage to structure

What came in, and what went out.

What the client broughtScattered references, no product vision.
What shippedA structured app and admin, live in Japan.
Discovery

Four ways to understand a market from abroad.

  1. 01AI-assisted researchUsed AI to synthesize Japanese parenting culture, childcare app patterns and mobile UX expectations.
  2. 02Spec deconstructionBroke the client's collages down screen by screen, dropped what couldn't scale, and proposed a structured admin instead.
  3. 03Reference benchmarkingMapped the TikTok and Reels interaction model onto childcare content and checked the fit before committing to the feed.
  4. 04Scope negotiationPushed back on requests that would have killed the deadline, defined a tight MVP and held the line for six months.
Key decisions

Four calls that got it shipped on time.

Mobile feed
01 / 04

A TikTok-style vertical feed

Exhausted young parents need zero learning curve.

What I'd do differently

Plausible is not verified.

AI research got me to a plausible read of Japanese parenting UX. The app shipped, but whether those patterns fit how Japanese parents actually behave is something I still can't answer. On a foreign market next time, I'd budget for a handful of remote sessions with real users.

Lessons
  • AI as a research partnerUseful for closing cultural gaps quickly.
  • Design is negotiationHalf the job was saying no to protect the timeline.
  • Familiarity winsA swipe feed parents already know needs no onboarding.
Got references, not a product?

Turn a moodboard into something you can ship.

For founders with a clear idea and scattered inputs. I structure the product, hold the MVP line and hand off a system devs can build from.

Similar work: UX audit, quoted after a short call

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