WiLearn: Design and Implementation of a Microlearning System that Utilizes a Captive Portal of Wi-Fi. - Koushi Hiraoka; Shuta Matsuo; Yutaka Arakawa; Yugo Nakamura (ICMU, 2023)

Exploring Trade-Offs in Privacy-Aware Activity Recognition with Small Wearable Cameras. - Koushi Hiraoka; Yugo Nakamura; Yutaka Arakawa (HCI (37), 2025)