Internet of Things (IoT) has been attracting attention due to its economic impact and high expectations for drastically changing our societies. Trillion-scale IoT devices including sensors and actuators are being installed in "things" such as machines, humans, vehicles, buildings, and environments in the near future. At the same time, we are facing research challenges on how to effectively, timely and integratedly handle these over trillion flows gushed from massive devices or heterogeneous pervasive systems.

Based on the success of our previous workshops, IFoT 2016, PerFoT 2018 and PerFoT 2019, the fourth edition with a new acronym, the 2020 International Workshop on Pervasive Flow of Things (PerFlow 2020), aims to present and discuss research challenges, design/implementations of new architectures, and experiences on timely/real-time utilization of massive information flows (or data streams) as well as interoperability, integration, and coordination among different pervasive systems possibly with different paradigms and from different epochs.

The workshop received 6 submissions and accepted 4 regular papers out of them. We have a very exciting program consisting of those papers that cover a wide area of the above challenges and a keynote talk by Professor Masahide Nakamura at Kobe University.

We would like to thank all the authors who contributed papers and the technical program committee members for completing reviews under a very tight schedule. Finally, we thank the PerCom 2020 workshop chairs, Professor Amy Murphy and Professor Edison Thomaz for all the support during the organization of the workshops.

Keiichi Yasumoto, Nara Institute of Science and Technology;
Hirozumi Yamaguchi, Osaka University;
Christian Becker, University of Mannheim;
Program Co-Chairs of PerFlow 2020

Organizing Committee
	Christian Becker (Universität Mannheim, Germany)
	Hirozumi Yamaguchi (Osaka University, Japan)
	Keiichi Yasumoto (Nara Institute of Science and Technology, Japan)

Technical Program Committee

Christian Becker	Universität Mannheim	Germany
Carsten Griwodz	Simula Research Laboratory	Norway
Takahiro Hara	Osaka University	Japan
Teruo Higashino	Osaka University	Japan
Vana Kalogeraki	Athens University of Economics and Business	Greece
Yuka Kato	Tokyo Woman's Christian University	Japan
Gen Kitagata	Tohoku University	Japan
Philippe Lalanda	Grenoble University	France
Spyros Lalis	University of Thesally	Greece
Hiroshi Mineno	Shizuoka University	Japan
Archan Misra	Singapore Management University	Singapore
Amy Murphy	Fondazione Bruno Kessler	Italy
Katsuhiro Naito	Aichi Institute of Technology	Japan
Masahide Nakamura	Kobe University	Japan
Yasuo Okabe	Kyoto University	Japan
Paul S. Pang	Unitec Institute of Technology	New Zealand
Gregor Schiele	University of Duisburg-Essen	Germany
Hiroshi Shigeno	Keio University	Japan
Hirozumi Yamaguchi	Osaka University	Japan
Keiichi Yasumoto	Nara Institute of Science and Technology	Japan
Na Yu	Samsung Research America	USA