Idemitsu Kosan Co.,Ltd. and Mitsubishi Corporation integrated their liquefied petroleum gas businesses to establish Astomos. Astomos is Japan's major distributor of LPG, supplying 26% of the nation's market. The aspirations of the company are reflected in the name “Astomos”; which includes elements of the Japanese words for “tomorrow” (asu) ,as well as “light up” (tomosu) and “friend” (tomo)