Yamato Wine’s main winery is located in Katsunuma-cho. Its Shiga Winery is located in Nagano Prefecture. The main winery produces primarily white wines. The Shiga winery produces reds, primarily Merlot. The company’s aim is to produce world-class wines reflecting its own unique values, wines that are “rich, complex and elegant.” Its meets this challenge as only a winery with deep roots in Koshu could, developing wines from distinctive grape varieties with long histories in the region. These include Koryu, a wine made from grapes from 130 year-old vines, as well as wines made from such heritage grape varieties as Hishiyama Koshu, Koshu Sanjaku, and Murasaki Budo. This winery continues to research how vines assimilate minerals and also how to raise the amino acid content of its wines, aiming to produce wines strikingly different from conventional Koshu.