> Ketchup is a sauce with tomatoes in Historically, ketchup was a class of condiments that all had a lot of umami like fish sauces and oyster sauces. Over time

> Ketchup is a sauce with tomatoes in Historically, ketchup was a class of condiments that all had a lot of umami like fish sauces and oyster sauces. Over time, different ketchups were invented, one of which was tomato ketchup. Its popularity grew, and the other ketchups were forgotten, so these days ketchup is synonymous with tomato ketchup.