Hannu Toivonen has over 200 international refereed publications. According to Google Scholar, he has been cited 27,000 times and he has an h-index of 59. He served as Programme Chair of IEEE ICDM 2014, a leading data mining conference, of ICCC 2015, the International Conference on Computational Creativity, and of the AI, Arts & Creativity special track of IJCAI 2022. He is Editorial Board member of the leading journals and a regular Senior Programme Committee member of the leading conferences in his research areas.
Hannu Toivonen has been decorated as Knight, First Class, of the Order of the White Rose of Finland. He is a member of the Finnish Academy of Science and Letters and of the Finnish Academy of Technical Sciences. He is also a honorary member of the computer science student association TKO-äly ry.