Ecomoni was created for the environmental festival "Acchi Chikyuu wo Samasunda!" (Cool Down the Hot Earth!), a two-day event which took place on the 19th and 20th of June. They were originally supposed to have disbanded after the festival during a ceremony to switch off the Tokyo Tower lights, however Koike Yuriko, Japan's Minister of the Environment, personally requested that they continue. In July and October of 2004 and in January of 2005, Ecomoni made a number of appearances on the TV show Oha Star.