“The katsu curry craze is a specifically British phenomenon; it isn’t derived from a larger international trend. American supermarket shelves are not laden with katsu curry products. Burger King never sold their Katsu Range in Canada or Australia, and McDonald’s didn’t release their katsu curry nuggets anywhere else either. The trend is also a recent one – the ubiquity of katsu curry feels sudden and unprecedented. Unlike chicken tikka masala, it does not derive from a major wave of immigration to the country; unlike burgers, it is not inspired by a country that wields global cultural hegemony. But while the trend seems to have come out of nowhere, perhaps it should come as no surprise. After all, katsu curry is British food. Or, at least, it was”
https://www.vittlesmagazine.com/p/the-katsuification-of-britain