Eden Plum Concentrate is made in Japan from unripe green ume plums. The plums are harvested, washed, soaked and then pressed. The juice is slowly cooked down over 48 hours to produce a thick, dark syrup concentrate. For every kilogram (2.2 lb.) of fresh plums, only 20 grams of ume concentrate is obtained, resulting in 30 times the concentration of pickled ume plums without the high sodium content of umeboshi plums. The concentrate is sealed in brown glass bottles to preserve and protect freshness. Eden Plum Concentrate contains no artificial colors or preservatives.