OTOTONARI is a pervasive game using ad-hoc network and generating sounds from the neighborhood and a number of handheld terminals in a certain area. The users can not only create sounds based on the proximity among the users in the real world but also share the generated sounds with other users who plays the game next. An experiment using this system revealed that listening to the generated sounds from the previous users made the present users change thier actions. OTOTONARI is the first pervasive game in Japan developed for Expo Aichi 2005 IT Experiments and has an unprecedented approach to store information in the real world.

Satoru Tokuhisa：Concept / Design
Yoshimasa Niwa, Kenji Iguchi, Sosuke Okubo and Tomoyuki Nezu：Programming