This book constitutes the thoroughly refereed post-conference proceedings of the 18th Japanese
Conference on Discrete and Computational Geometry and Graphs JDCDGG 2015 held in Kyoto Japan
in September 2015. The total of 25 papers included in this volume was carefully reviewed and
selected from 64 submissions. The papers feature advances made in the field of computational
geometry and focus on emerging technologies new methodology and applications graph theory and
dynamics. This proceedings are dedicated to Naoki Katoh on the occasion of his retirement from
Kyoto University.
