Ease of eating that is pure white like snow and has little lye. Crispy and light texture. The fresh scent including sweetness is unbearable. It is a native species of Aomori with such exceptionally high quality. Chinese yam boasts top-class production and seems to account for about 40% of domestic shipments. The main production areas are the southern regions located on the eastern side of the prefecture, such as Towada City, Misawa City, and Tohoku Town.
In order to cultivate it, it seems that soft soil is needed for the new yam to grow deep in the ground (about 1 m). Surface humus andosols are distributed throughout the production area. “Ganku” is a thin part with leaves, and it seems that the long potatoes from Aomori have this name because this part is short. Anniversary: Autumn digging harvested from November to December and spring digging harvested from March to April are customary.
The leaves turn red from the end of October and gradually start to die, and the harvest seems to start from the end of November to December. Large machines such as power shovels and trenchers are used for harvesting. The Chinese yam harvested during this period is called autmun digging yam. It seems that the whole amount is not dug in autumn and the rest is stored in the soil during the winter season without digging. It is left in the soil and rests for a certain period of time. Normally, plants sprout new shoots when they are in the soil, but it seems that they do not sprout because they mature in a low temperature environment and dormant in the soil. It has a dormant period of about 3 to 4 months, and it seems that it is harvested as a spring moat chinese yam before it sprouts.