Table 1.

Basic characteristics of the Hokkaido 2015 and 2018 Zweigelt red wines.

Item	Zweigelt 2015	Zweigelt 2018
Vineyard	Tsurunuma	Kitajima
Specific gravity	0.994	0.993
Alcohol (%)	12.34	12.54
Total acidity (g/L as tartaric acid)	5.23	5.73
pH	3.67	3.56
Total sulfur dioxide (SO2) (ppm)	98	149
Sugar (g/L)	5.6	3.5

Total SO₂ is the sum of molecular, free, and bound SO₂; ppm, part per million.