For what it's worth, my Japanese wife makes a curry which has a lot of very thick and yes, sweeter/milder sauce----it's almost like a thick stew. It generally has stewing beef, potatoes, carrots and onions (as mentioned before). Most Japanese housewives would not even consider making it from scratch but rather, buy a package of "curry" sauce or powder and add the ingredients and let simmer like a stew. Sometimes this is even served with or poured over rice.