Hence, steeping ume in commonly-used mirin and so on that has ten to fourteen percent alcohol by volume not only introduces the possibility of rot, but it is also illegal (Order for Enforcement of the Liquor Tax Law Article 50 Clause 10.1).
従って10～14度の一般的なみりんなどで漬け込む場合は、腐敗の可能性だけでなく法律違反となる（酒税法施行令第50条第10項の1）。