Umeboshi are pickled Japanese plums made from the ume fruit, which is a type of sour plum. These plums are typically harvested when they are unripe and then pickled in salt, often with the addition of shiso leaves for flavor and color. Umeboshi are known for their intense sour and salty taste, making them a popular condiment in Japanese cuisine. In addition to their unique flavor, umeboshi are also valued for their health benefits. They are believed to aid digestion, boost energy, and have antibacterial properties. Often served with rice or used in onigiri (rice balls), umeboshi are a staple in traditional Japanese meals.