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How Saké Is Made:
The process of Saké is similar to making beer
because it is brewed. However, like the best wines, which are
made from the best grapes, the finest Saké also is made with the
finest ingredients, the purest water, high quality Saké rice,
special yeast and koji. These four ingredients used in brewing
of Saké is known as Junmai “Pure Rice”.
Water:
The first ingredient is water. Unlike grapes,
rice has low moisture content so water must be added. The water
needs to be pure; mineral free, fresh and sweet in the mouth
like it came from a mountain stream. The Saké One chose Oregon
to build their Sakéry for that very reason. We have water, lots
of water, lots of pure water from the east coast of the costal
mountain range, which is the best water available in America to
produce premium Saké.
Rice:
There are only 200 varieties of rice out of the
thousands of kinds that are good for brewing Saké. Saké rice is
brown, short grain, almost round. In the center of the rice
grain, is where the starch is found that produces the best
flavors. This center or heart looks similar to a white pearl,
referred to by the Japanese as the shinpaku or “white heart”.
In order to produce the highest quality Saké,
Ginjo, 40 % of the outer hull must be polished away. All the
fat and proteins are found there, and that is where the
unpleasant taste may come from. To make sure you are drinking
the highest quality look for the term Ginjo on the label. The
even finer quality Sakés, like the one’s produced by the
Momokawa brewer in Japan polish away 50% of the hull, producing
a rare and expensive Saké referred to as “Daiginjo”.
Notice also that the term used in perfecting the
rice grain to Ginjo, or Daiginjo, is polishing, not grinding.
Polishing is a gentle process where the rice grains are rotated
against each other to prevent cracks in the grain. If the rice
is ground, cracks occur which can cause the fermentation to
happen at different rates in different grains, which causes the
loss of the subtle fruit flavors that are common to good Saké.
After polishing, the rice is then washed and
soaked to bring up the water content before it is steamed.
After steaming a part of the steamed rice is set aside for the
koji process the rest goes directly into the brewing tanks.
Koji:
Koji is one of the keys in the Saké making
process. Koji is a mold that is cultivated on a bed of steamed
rice. This process releases enzymes that bread down the
starches into smaller sugar molecules that act as food for the
yeast. The final product is small BB sized powdery pearls,
which are sweet and spongy.
Environment:
The humidly and temperature are key in the koji
process. This was explained to us as we wandered into the
biggest sauna I have ever seen. Traditional cedar planked walls
are used as a natural deterrent of bacteria. Since Saké One
has the only cedar lined koji rooms in America, it ensures a
higher quality of koji, it allows brew master to come in and
hand turn the rice with wooden paddles over a period of several
days. This helps to avoid clumping of the rice. The other
breweries use large stainless steel tanks with metal paddles
that turn the koji, which causes clumping. Clumping causes
un-uniform inoculation and can affect the product.
Yeast:
The yeast used is also critical in the outcome of
the Saké. Saké One imports and then grows a special strain of
Momokawa yeast that they add with water and sent to the moto, or
starter tank. Brewers that produce Saké for the ‘hot’ Saké
market brew quickly at higher temperatures. For premium Ginjo
Saké, multiple batches are made and cold brewed at temperatures
of about 35 degrees F. for about a month.
Filtration:
After a month of bubbling and brewing in the
tank, the Saké is filter and pasteurized to stop the
fermentation process.
Aging:
The filtered and pasteurized Saké is then aged
for three months to a year; the aging process adds complexity
and depth to the final product.
Bottling:
After the Sake master is content that the Saké
has aged properly to ensure the best flavors, the Saké is then
pasteurized once more and then bottled.
Before the pasteurization process was invented,
Saké was consumed for centuries as Nama Saké “fresh”. Nama,
since it is not aged or pasteurized has a short shelf life,
because it will begin to ferment again. Nama offers some
surprising and intensely wonderful flavors that are definitely
worth trying. It was my favorite and I prefer it to wine.
Fresh Nama should be refrigerated and will have
an expiration date on it, which ensures the fullest of flavors.
Some Nama is sold without being refrigerated. It has been cold
filtered which keeps the yeast from being bottled. The cold
filtration process also filters out the big flavor molecules
that make the real thing so spectacular to drink.
I was very impressed with Saké One; they seemed
to take the extra care in producing the finest quality, Ginjo,
Saké possible. They have taken many steps not only to ensure
tradition in Saké brewing, but they also bring an American touch to the
process that makes the product uniquely their own.
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Yeast Starter produces trillions
of yeast cells from the imported test tube.

Test tube
containing imported yeast, and the bag with the trillions of
reproduced yeast cells

Cedar lined koji
room,
like a giant sauna

Finished koji,
like tiny white pearls

Top of
fermenting tank

A look down
inside at the fermenting saké

Moromi press,
containing a series of metal screens and heavy cheesecloth.
Solids build up on the cloth which enables the saké to naturally filter itself.

Storage tanks
where saké is stored for three months to over a year

Bottled saké
ready to go
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