**** 酒粕：SAKE-KASU ****
KASU means actually "dust" and often used to insult people by asserting them as useless.
However, "SAKE-KASU" is very useful food or food material.
SAKE-KASU is the dust which is made when they squeeze SAKE or Japanese rice wine.
SAKE-KASU is made from rice and used like as the MISO (fermented soy beans). SAKE-KASU has much more functionality to keep the health and beauty. Famous cosmetique product "SK-II" is said to involve some extract of SAKE-KASU.
Here is the
link to the Wikipedia in Japanese.