About

Everyday needs, made into apps.

Useful tools for everyday needs.

KUMAKIKAI is an app development brand operated by Yuya Nakamura as a sole proprietorship.

Founder

About the developer

Yuya Nakamura

Software Engineer / App Developer

Yuya Nakamura has experience in software development across embedded systems, business systems and mobile apps.

Yuya does not limit app development to a particular field. Ideas come from things Yuya finds inconvenient in everyday use or from problems mentioned by people close to Yuya. Yuya turns those ideas into apps when there seems to be a need for them.

Read about development and operations

Development experience: Embedded systems / Business systems / Mobile apps
Technical experience: C / C++ / C# / Java / Python / Dart / Swift

What we build

The kinds of apps we develop

Learning
Apps for learning, writing and organising ideas.
Uni:NoteiPad
Communication
Apps that support conversations and help people express themselves.
OtoMiruiPhone / iPad
Utilities
Apps that make everyday tasks easier.
GigaPokeiPhone

View all products

For Media

For the media

We welcome enquiries about coverage, interviews, our products and potential collaborations. Official introductions to our apps are available under Press Release.

View Press Release Contact us about media enquiries

Overview

Name: KUMAKIKAI
Developer: Yuya Nakamura
Business structure: Sole proprietorship
What we do: Planning, development, and operation of mobile applications
Qualified invoice issuer (Japan): Registered
Verify on the National Tax Agency website

Contact

Media and other enquiries

Please email us with your publication, the nature of your enquiry, the relevant product and your preferred timing, where applicable. For app instructions or issues, please see the support section on each Product page.