Also, among sakes claimed to be Kimoto type (sake production based on Kimoto method), there is seisei-shu (sake product) with risky sourness which exists just before turning to putrefaction and with harsh taste which makes sake hard to drink, and it is called nezumi-watari (rat's sake) in jargon of workers at sake breweries.
なお、生酛系の造りを名乗る酒のなかで、不健全醗酵により腐造寸前の危ない酸味、飲みにくいエグ味を帯びた製成酒を蔵人言葉で鼠渡り（ねずみわたり）という。