Sake清酒的酒度酸度

清酒的含量是用比重計（hydrometer 酒度計應可以量度）測定的。

簡單地說，在水為±0的情況下，如果含糖量高，就會比水重，比重計就會向負值傾斜，如果含糖量低，即是比水輕，比重計就會向正值傾斜。

日本酒度S.G. 指的是「15℃ 的日本酒, 跟 4℃跟水比較，密度是高還是低」，詳細的定義是「日本酒度 =（1443／比重）－1443」

Nihonshu-do from homebrewsake

因此，負值為甜，正值為辛。

一般認為，清酒含量低的清酒口感偏甜，

清酒含量高的清酒口感偏辛

但由於清酒的口感並不是單單由清酒含量決定的，所以最好以此為粗略指導。

清酒度數在-1.4～+1.4為正常，清酒度數在+6以上為大辛口，+10以上為超辛口，-6以下為大甘口，-10以下為超甘口。

日本酒整體的平均酸度在1.14～1.44之間，據此，酸度越高，口感越豐富、越深，酸度越低，口感越淡。

甘度和辛度來看，酸度高的清酒容易讓人覺得辛口，酸度低的清酒則容易讓人覺得甘口。

一般來說，酸度高的酒更容易被認為是辛型酒，而酸度低的酒更容易被認為是甘型酒。

Reference

1shot

Sakenowa

Sakenomy 大多數清酒有酒度，酸度，及評價

HCL hk

越乃雪椿：

清淡，微甜，米仔蘭香。冬雪融化的清新

Brix 10.5, SG 1.042-1.043

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