Ume seasoning comes from the juices produced by pickling umeboshi plums. Umeboshi plums are a traditional Japanese condiment, where ume plums are slowly salt-pickled for a year. This process produces a tangy, concentrated seasoning. This Ume seasoning has quite a salty flavour and a lemon-like sourness, therefore it can be used similarly to vinegar.
Ume plums (82%), sea salt, red shiso (perilla) leaves (2%)