Innovators Marketplace as Game on the Table versus Board on the Web. - Yukio Ohsawa; Kensuke Okamoto; Yuma Takahashi; Yoko Nishihara (ICDM Workshops, 2010)

MANET Viewer III: 3D Visualization System for Mobile Ad Hoc Networks. - Akihiro Inoue; Yuma Takahashi; Akio Koyama (NBiS, 2013)