Kasu-jiru is a soup made with sake lees.
I don't like this soup because the sake smell is strong. Satoshi on the other hand, loves this soup.
My MIL served this to us the other time we visited her last month. I picked at it and eventually gave my serving to Satoshi, when it came time for us to leave, my MIL gave me some extra kasu to make some kasu-jiru for Satoshi, as she knows it is his favorite.
Satoshi comes home late every night, but for the past couple of weeks, Satoshi has been working extra late. His company will be changing to a new computer system soon, so they are trying to prepare for the switch over.
Since he usually comes home so late, I don't serve him a proper dinner because eating a full meal at midnight or 1 am wouldn't give him enough time to digest it all before going to bed.
So, in the morning, I send him to work with a musubi and some tea, this is for him to eat at about 7 or 8 in the evening. Then when he comes home, I usually serve him salads or soups like this or even this so that he won't have to go to bed feeling hungry. Then the next morning, I try to feed him a hearty breakfast. (When we first moved to Japan, I would feed him a full meal late at night and in the morning, he wouldn't be hungry and want to skip breakfast.)
Anyway, here is how I made the soup.
Salmon kasu-jiru : serves 2
40 grams sake kasu (sake lees)
1/2 a stick of gobo (about 8-inches long), whittled
1/2 a carrot, sliced
1/2 a sweet potato, cubed
1 piece of salmon, take bones off, cut into bite sized pieces
Add 3 cups of water, put veggies in and bring to a boil
After 10 minutes, check to see if sweet potato is soft
Turn down heat to low and add salmon,cook for 5 minutes.
Add kasu and mix well. (It should "melt" into the soup)
After kasu is well mixed into the soup add some salt and shoyu to taste.
NOTES: Most times daikon is used in this soup, but I would suggest using whatever veggies you have on hand. Also, if you don't have salmon, just leave it out. My MIL served her soup with just veggies.