Umeboshi (Japanese: 梅干) are pickled ume fruits common in Japan. The word "umeboshi" is often translated into English as "Japanese salt plums," "salt plums" or "pickled plums." Ume (Prunus mume) is a species of fruit-bearing tree in the genus Prunus, which is often called a plum but is actually more closely related to the apricot. Umeboshi are a popular kind of tsukemono (pickles) and are extremely sour and salty. They are usually served as side dishes for rice or eaten on rice balls (often without removing the pit) for breakfast and lunch. They are occasionally served boiled or seasoned for dinner.
==Special Precautions of Umeboshi==
Since the pit of young, green, unripe ume contains the toxic substance amygdalin, which generates harmful hydrogen cyanide, avoid eating green ume.
==Benefits and uses of Umeboshi are==
This Japanese style traditional pickle is considered good for digestion, prevention of nausea, and for systemic toxicity, including hangovers. Green ume extract is even used as a tonic in Japan. The citric acid is claimed to act as an antibacterial, help to increase saliva production and assist in the digestion of rice. Additionally, umeboshi is claimed to combat fatigue (historically given as part of a samurai's field ration) and protect against aging.