Following from the success of ONNA2013 & 2015, the ONNA2017 workshop will be held at OIST Graduate University (http://www.oist.jp) from 5-8 June 2017. The aim of the workshop is to bring together experts and early stage researchers from diverse communities who use optical micro and nanofibres for their research needs, whether it be for quantum, sensing, or other applications. The number of participants is strictly limited and will be based on application.