Blockchain attracts as a technology that adds trust on information without a trusted third party. However, Blockchain is not complete, there are still many issues like scalability, the verification of security and so on. In this project, we present our some works on improvement of Blockchain technology; Bsafe.network is an experiment blockchain network that collaborates with several universities all over the world. Karakasa is a new node scheme for storage resource-constrained devices that load-balance storage requirement among DHT clustered nodes.
There are several discussions on Blockchain applications, not the only cryptocurrency. In this project, we present some applications on Blockchain with clarifying the limitation of today's Blockchain and discussing social-aspect with new applications. We present our applications Fabchain, that record the manufacturing log that an individual create an object by 3D printing. It utilizes the method that blockchain as an auditable communication channel.