OICETS, the Optical Inter-Orbit Communications Engineering Test Satellite (other name Kirari) is an experimental satellite by the Japan Aerospace Exploration Agency to demonstrate interorbital communication between satellites through optical (laser) means.
In order to be able to perform the tests during the lifetime of the European Artemis satellite, OICETS was successfully launched on a Dnepr launcher.
Operation finished by September 24, 2009.