A Filtering System of Web History Using the Browsing Characteristic. - Keita Arai; Makoto Oka; Hirohiko Mori (HCI (4), 2015)

Development of population monitoring system for events in a large park. - Keita Arai; Hiroshi Yamamoto; Katsuyuki Yamazaki (ICOIN, 2017)

Visualization System for Analyzing Customer Comments in Marketing Research Support System. - Keita Arai; Yoshitaka Sakurai; Eriko Sakurai; Setsuo Tsuruta; Rainer Knauf (SERVICES, 2019)