I’m a huge fan of Japanese food but this seems to completely ignore the fact that what makes it so delicious is that it’s the result of hundreds (and in some cases thousands) of years of bastardisation and adaptation from other cultures.
This comes across like people who rail against changes in language usage; the sentiment is well-intentioned but trying to codify and protect something that exists in as much flux as food or grammar kind of misses the point about what makes them so awesome in the first place.