Abstract
For the special issue of the fully successful TRMM mission which is the first US-Japan joint mission launched by a Japanese rocket, the first attempt to measure global precipitation precisely and three dimensionally by a satellite-borne radar, and the first space project in Japan proposed and brought into reality by researchers except for with Institute for Space and Astrophysical Science, this article attempts to introduce the very essential facts of the desperate efforts by many people in the pre-historic era of the project that started in the middle 1970s and tries to send a cordial message for the young generations.
