Platform "dona" that shares the successful experience of donation in cryptocurrency. Block chain technology solves the uncertainty and low reliability of the donation market. With this technology, the flow of donation money is open to the public and can't be tampered. A "recipient" in trouble registers a support project, "supporter" who supports them selects that and donates with dona coin. This realizes donation to support activities directly without intermediate organization. Also, by connecting them directly, we will build a community that shares the successful experience of donation. We aim that people all over the world use "dona" by Issuing its own encryption currency "dona coin" through the exchange eventually.