Running a Japanese neighborhood association — jichikai or chonaikai — involves a surprisingly dense set of recurring tasks: circulating bulletins to every household, collecting annual dues, conducting safety checks on elderly residents, managing votes at the general meeting, maintaining a shared annual calendar, and writing handover documentation for whoever takes over next year.

Most of this gets handled across paper forms, LINE group chats, and verbal hand-offs. Nobody holds a complete picture of who is doing how much, and that invisibility is a core reason these positions are perpetually hard to fill.

Musubiba is our attempt to address that specific problem.

The app isn't trying to automate volunteer work — the goal is visibility. When every task is logged in one place, workload distribution becomes data instead of assumption. A new officer inheriting the role can open structured handover notes instead of piecing things together from memory.

The feature set covers exactly what the job requires: bulletin circulation with per-household tracking, dues collection, safety check logs, meeting votes, an annual schedule, and handover notes. Members join by scanning a QR code. There's also a web view for accounting entry, which we added because many officers are more comfortable entering financial data at a keyboard.

Tech stack: Flutter for the shared iOS/Android codebase, Firebase (Firestore, Auth, Cloud Functions) for backend, Stripe plus Apple IAP for payments.

One thing worth being upfront about: Musubiba is built specifically for Japan's jichikai/chonaikai structure. The terminology, flows, and assumptions reflect how Japanese neighborhood associations actually operate. It won't map cleanly to HOAs or similar organizations outside Japan — that's an honest scope limit, not an oversight.

Pricing: free for groups up to 15 members. Unlimited membership costs ¥1,500/month.