I'm interested in dynamical systems and topological data analysis. I started my doctor course from ergodic aspects of dynamical systems. I switched the research field to more topological dynamical systems and their applications in my postdoc. Now I am interested in the theory, software, and application of topological data analysis, especially persistent homology. I am a main developer of [HomCloud](http://www.wpi-aimr.tohoku.ac.jp/hiraoka_labo/homcloud/index.en.html), which is a persistent homology based data analysis software.