Meet Kasu Jiru: Kasu-jiru is soup made with sake lees. The sake taste is pronounced and the sweet, fruiting bouquet of fermented sake mash is obvious as well. We made this with late winter veggies and chicken.

Winter Sake Soup
Kokabura turnips are in season through out the winter in Kyoto and nanohana (rape blossoms) signal the coming of spring. Winter is of course the time that sake is being made, so sake kasu is only available this time of year.

Late Winter Kasu Jiru: The Ingredients

From the left, kokakura (small turnip), nanohana (rape blossoms), sake kasu (sake lees) and chicken.

Kokabura is translated as ‘turnip’ in my dictionary, my experience with turnips are that they are rather dry and tough. These Japanese ‘kokabura‘ turnips are quite soft and juicy though and so much so that the first time we made this dish the inner part of the kokabura just melted with only the surface retaining its shape. This time we cooked them just 7 or 8 minutes. They were tender and intact, with some fresh veggie taste still in them.

The nanohana rape blossoms still had no yellow flowers on them, just buds. They just appeared in stores this week. They are tender and rather hefty and ‘meaty’ for greens and pleasantly bitter. These we cooked for just 3 minutes or so.

Kasu Jiru: Adding Kasu to Soup Broth

Our kasu jiru is very thick with plenty of kasu. We make a base dashi with three kinds of shaved fish (comes in a tea bag), some salt and mirin. We simmer the chicken well and then add the kokabura and kasu. With the kasu we sometimes add a little bit of miso paste, to deepen the flavor, but not enough to taste directly.

The key here is good, fresh ingredients and not too much cooking.

Kasu Jiru Served – detail

Kasu Jiru Served with Black Shichimi

Usually shichimi (seven spice) is red, but the best, in our opinion, is the more rare black shimichi.

Kasu Jiru Served with Black Shichimi – detail

My favorite thing about this wonderful dish is the taste and fragrance of the fermented sake mash. It is pronounced and unlike any soup or stew that I have ever had anywhere in the world. Maybe in the Western countries we can use beer or spirits mash in a similar way?

Kasu Chinmi: Ikura is hard to beat, but salmon roe marinated in sake kasu for about a week beats ikura! This is a rather rare dish in Japan. The first time I recall having it was this January at Kichisen. After one bite, I knew that I had to try making it! Winter is the season for both sake kasu and salmon roe. It of course tastes of salmon roe and in addition has a wonderful flavor combination of sake and the fruity fragrance of fermenting sake mash.

What is Sujiko?
Sujiko, unlike ikura is still in the egg sac, ikura is individual eggs. Ikura can be cured with either salt or shoyu and the slightly sinewy egg sac is removed. Once sujiko is cured, the taste is identical to ikura and the texture is not very different.

I just packed the sujiko sacs in sake kasu and refrigerated for about 1 week. It of course keeps longer than that.

Sujiko Kasuzuke can be enjoyed as is and goes very well with sake or wine. With food it is usually served on rice, we used it to make a luxurious onigiri rice ball (see photo below).

Preparation

Kasuzuke: Sake Kasu

Kasuzuke: Sake Kasu – detail

Sujiko (Salted Salmon Egg Sac)

Sujiko on Sake Kasu

Next step is to gently cover it with kasu.

Done

Sujiko Kasuzuke

Sujiko Kasuzuke

Sujiko Kasuzuke

Sujiko Kasuzuke

Sujiko Kasuzuke

I am trying to figure out what to do with all this orange stained sake kasu now. We are certainly not going to throw it out! I am hoping that it will make excellent salmon kasu soup, we will let you know if we are able to come up with anything yummy.

Served

Sujiko Kasuzuke – served

Sujiko Kasuzuke – served

How Did it Taste?
Sujiko cured in sake kasu has a definite taste of sake and the flowery sweetness of the mash. This kasu we used this year was teshibori (hand-pressed) so the alcohol content is higher than mechanically pressed kasu. Also, I mixed in some fine ryorishu (cooking sake) to increase the liquidity of the kasu, making it better for marinading.

I have been making onigiri (rice balls) with it and eating it as chinmi on or along side rice at dinner. It is really nice! It is very easy to make and doesn’t even cost that much, but if you do the preparation you are rewarded with a very luxurious and special taste.

A friend that doesn’t drink much was over for dinner recently and was a bit surprised at the alcohol content in the sujiko! I guess she got a bit of a ‘buzz’ from it! That’s what I like, food that gets you drunk!

Sujiko Season
By the way, sujiko is in season in late autumn and early winter. I bought this in February but had to hunt around for it. I found it at the food court at Fuji Daimaru Department Store in Kyoto. I bought 6 roe sacs for about 1,800 yen. A pretty reasonable price, I thought. If it had been proper ikura, I think that it would have cost about 3-4 times that for the same amount.

Sujiko Kasuzuke Onigiri

This is from our Uri Nukazuke Onigiri article.