Layered touch panel: the input device with two touch panel layers. - Yujin Tsukada; Takeshi Hoshino (CHI Extended Abstracts, 2002)

Two TV interfaces for freely accessing the content of continuous multi-channel recording. - Jun-ichiro Watanabe; Yujin Tsukada; Takaaki Ishii; Sergio Paolantonio (IEEE Trans. Consumer Electron., 2006)

TouchFace: the interaction between cursors and live video images for casual videoconferencing. - Yujin Tsukada; François Guimbretière (Conference on Designing Interactive Systems, 2010)