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. OICETS was originally slated for a launch on the second J-I launcher. Unfortunately due to problems with this launcher, the launch had to be put on hold. Using the H-2A was out of question, since it would be overkill to use this model to send a 570 kg satellite into LEO. Also there was no budget for another H-2A launch. Finally, 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.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.