>>70686071Japanese curries are roux-based and tend to be on the soupier end of the spectrum. Indian curries tend to use the spices themselves, onions or yogurt as a thickener. Japanese curry is actually more british than indian in some ways.
Curry basically started out in the Indus Valley in 2600BC, and from there spread naturally to SEA (where using coconut and coconut milk was introduced) and the middle east, but it didn't reach Japan. It took all the british empire shenanigans, them taking curries back to the UK, and then starting to export them worldwide to introduce curries to Japan during the Meiji Restoration, iirc. That's why Japanese curry uses a more western technique like a roux, and why it's commonly used in the form of long-lasting cubes, which were often used to feed sailors of the Royal Navy.