Japanese curry
In Japanese homes, curry sauce is most commonly made from instant curry roux, which is available in block and powder forms, and contains curry powder, flour, oils and various flavorings. Ease of preparation, and the wide variety and availability of instant curry mixes, has made curry rice very popular, as it is very easy to make compared to many other Japanese dishes. Pre-made curry is available in vacuum-sealed bags that can be reheated in boiling water. For those who still make their curry roux from scratch, there are also curry powders specially formulated to create the "Japanese curry" taste.