This Special Issue presents selected papers from the 8th Symposium on Micro-Nano Science and Technology on Micromachines, 31 October-2 November, 2017, in Hiroshima, Japan.

We encouraged contributions of significant and original works in order to deeply understand physical, chemical, and biological phenomena at the micro/nano scale and to develop applied technologies. The conference covered the following main topics:

1: Precision machinery lubrication design
2: Material dynamics strength
3: Hydrodynamics
4: Thermal engineering
5: Production processing mechanical materials
6: Robotics mechatronics
7: Medical biotechnology
8: Micro/nano system

The papers that attracted the most interest at the conference, or that provided novel contributions, were selected for publication in Micromachines. These papers were peer-reviewed for validation of the research results, developments and applications.