About Me


I'm Katsu, a creative and passionate developer based in Tokyo.

I used to work in sales in the U.S. after graduating from university in Tokyo.

I decided to become a developer because I found the power of programming, which allows me to build any product I can think of from scratch.

So here I am.

My goal is to build and deliver valuable products to the world!

Web Applications

Lead Developer & Fron End Developer

Happy is an app which user can track their moods and activities. The app find and suggest good activities to users based on users' logs.

View Site →
Front End Lead & Back End Developer

Pick-a-sitter is an app which user can easily find and book babysitters around them.

View Site →
Pick a sitter
Cocktail & Cocktail
Back End & Front End Developer

This is an app which allows you to save cocktail recipes

View Site →
Fill in the blanks 1:Many
Front End Lead & Back End Developer

This is a app which allows you to create your own fill-in-the-blanks quizess. You can use this app for any learning purpose.

View Site →