This sauce is served atop or alongside steamed rice.
It can be compared to another popular dish, the Japanese-style hamburger steak with demi-glace sauce.
Another variation is the omuhayashi, a combination of omurice and hayashi rice.
Hayashi rice is one of Japan's most popular Western-style dishes.
Thanks to the widespread availability of hayashi rice mix (normally sold as roux blocks) and prepared demiglace sauce (normally canned) at Japanese supermarkets, this dish is common household fare.