This article explores the history of salt in Japan, the types of salt used in Japanese cooking, the role of miso and soy sauce in Japanese cuisine, how much salt the Japanese consume, and the health effects of eating too much salt. It is found that sea salts are produced by evaporating seawater or by collecting crystals from coastal areas; rock salts are mined from underground deposits; soy sauce-based seasoning salts (shio-koji) are made from fermenting soybeans with rice malt; miso-based seasoning salts (miso-koji) are made by fermenting miso paste with rice malt; and iodized table salt (shio) is commonly used as an all-purpose seasoning. According to research conducted by The World Health Organization (WHO), average daily intake estimates indicate that adult males consume 11 grams per day while adult females consume 7 grams per day on average across all age groups. Eating too much sodium can lead to increased risk factors associated with chronic