Traditional pergola system (Tana = frame, frame) in Japan, which has existed since at least the 17th century. In the Japanese wine-growing regions there is a high humidity due to frequent rainfall in summer. The shoots are guided like a roof up to ten metres to all sides on supporting wires. In winter they are protected with straw mats. The great distance from the soil moisture reduces the risk of fungal diseases. The Koshu grape variety in particular is cultivated in this way:
The picture shows a very old Koshu vine of the Grace Winery(Yamanashi on the main island Honshu). It has a trunk circumference of one meter. The widely spread shoots cover an area of 50 square meters. See also complete listings under Educational System (Systems) and Vineyard Care (Activities).
© Matthias Neske - Chez Matze