Tanaka Sake Brewery is a long-established brewery of sake or rice wine in Otaru, and has been producing nice sake for over 100 years.
Other than a variety of sake, they sell sweets called sakamanju that is made making use of sake lees, the spin-off of sake brewing.
The difference between ordinary manju or a steamed bread and sakamanju is the flavor of sake. You can smell the distinct aroma of sake when you eat it.
However, since it does not contain any alcohol, anybody including children can enjoy it.