HACK+2023 Grand Prize: Building a Blood-Donation Support DApp on the Symbol Blockchain
HACK+2023 Grand Prize
In April 2023, at HACK+2023, a Symbol blockchain hackathon organized by NEMTUS, the NEM Technology Promotion Association, an NPO corporation, the blood-donation support DApp Cycle won the Grand Prize. The team was formed by members who met through Miyako de IT in 2019.
Project overview: a blood-donation support DApp
The problem
Japan's blood-donation rate has been declining year by year, and the decline in donations among younger people has become a particularly serious social issue.
The solution
The team developed a DApp, or decentralized application, that uses the Symbol blockchain to provide incentives for donating blood.
Technology stack
- Blockchain: Symbol, the successor to NEM
- Frontend: React / TypeScript
- Smart contract: Symbol mosaic and transfer transactions
Roles and origin, recorded separately
| Item | Record |
|---|---|
| Organizer | NEMTUS, the NEM Technology Promotion Association, an NPO corporation |
| Award | Grand Prize, April 2023 |
| Deliverable | Cycle, a blood-donation support DApp |
| Origin of the team | Members who met through Miyako de IT in 2019 |
| Role of Miyako de IT | Sharing the result afterwards and connecting it to the next project |
Because the starting point for forming the team was meeting through Miyako de IT, we record it as a project born from participants meeting through the community. We also record the follow-on activity that the award produced.
What is confirmed, and what is not
So that anyone considering the same kind of hackathon can judge for themselves, the confirmed records and the unconfirmed items are listed separately. The check date is 7 September 2026.
| Item | Status on the check date | Basis |
|---|---|---|
| Award | Grand Prize, April 2023 | HACK+2023, organized by NEMTUS |
| What was built | Token incentives for donating blood, plus a way to follow where a donation went, published as a community record | The HACK+2023 Grand Prize record |
| Technology | Symbol / React / TypeScript / mosaic and transfer transactions | The technology-stack section of this article |
| Miyako de IT's role | Providing the setting where the members met in 2019, sharing the result afterwards, and connecting it to the next project | This article and A Guide to Running a Community-Led Hackathon |
| How the team divided the work | Not confirmed | The people involved have not been asked |
| Current operation or commercialization | Not confirmed | No publishable primary record exists |
The follow-on activity the award produced
The prize money was reinvested in UNKNOWN QUEST, a hackathon run by the community itself, held at UNKNOWN KYOTO on 29–30 July 2023. How it was organized is described in A Guide to Running a Community-Led Hackathon.
Miyako de IT's activity in Web3 and blockchain is set out as primary records in Regional Web3: Primary Records and Criteria for Adoption.
If you are interested, please come to a Miyako de IT event.
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Source data
The figures cited in this article are based on primary data in the Miyako de IT annual statistics report. It publishes yearly event counts, venue distribution, and event-format data.
Written by
Tomohiro Iida
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