1 to (unit of volume, approx. 18 litres)
Traditional Japanese unit of volume, equal to 10 升 (shō) or about 18.039 litres. Still used in contexts like sake brewing.
One to is about 18 litres.
In sake breweries, they sometimes brew in units of one to.
18-litre measuring container
From 一 (one) and 斗 (a traditional unit of volume). The character 斗 originally referred to a dipper or measuring vessel.