Independent mobile studio / Japan

Small worlds.
Quiet tools.
Made with care.

Hakumai studio creates mobile games and everyday apps with clear interfaces, gentle pacing, and practical support for the people who use them.

iOS / Android Mobile games Self-care apps

Apps

Current and upcoming releases from Hakumai studio.

Sotto Note app icon
App Store · Google Play

Sotto Note

A calm record-keeping app for nail biting and skin picking, designed to help users notice patterns without blame.

Seedly app icon
App Store · Google Play

Seedly

A private daily log for men's fertility and lifestyle habits, made for simple, steady reflection.

Studio

Based in Japan
Focus Mobile games, self-care tools, and personal record apps

We make compact software that respects the user's time and attention: clear screens, low-friction workflows, and worlds that feel easy to return to.

Clear Interfaces should explain themselves through structure, not noise.
Gentle Apps can support difficult habits without making users feel judged.
Useful Small tools should still be durable enough for everyday use.

Support

For app support, store review, privacy requests, and business inquiries.

Contact

Questions about our apps, data, or support requests can be sent by email.

support@hakumai-studio.com

Privacy

Privacy policies and terms are linked on each app card in the Apps section above.

View apps