Prism
Pico-satellite for Remote-sensing and Innovative Space Missions
Developed by the University of Tokyo. Will make Earth observations using an
expandable refracting telescope. It will also serve as a technology
demonstration and verification of the ultra-small satellite bus and will
provide various amateur radio services.
http://www.space.t.u-tokyo.ac.jp/prism/main-e.html
sat-index articles
Downlink at 437.425 MHz
Beacon at 437.250 MHz
weighs 5kg