Silkworm - Silkworm

Japanese: サクサン(柞蚕) - サクサン

A species of the Lepidoptera family, Saturniidae. It is closely related to the Yamamayu but is smaller, with a span of about 120 mm. It is gray-brown in color. It is native to China, but was imported to Japan during the Meiji period because the cocoons produce high-quality silk, and is raised in parts of Nagano Prefecture. It is generally raised outdoors because it is a gregarious species with little mobility. The larvae feed on the leaves of oak trees such as Sawtooth Oak and Konara Oak, and overwinter as pupae, with adults emerging twice a year. Tussah silk is strong and lustrous, but difficult to dye.

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

鱗翅(りんし)目ヤママユガ科の１種。ヤママユと近縁だがより小型，開張120mm内外。灰褐色。中国原産であるが，繭から上質の糸がとれるため，明治時代に日本に輸入され，長野県の一部などで飼育される。群集性が強く，移動性が乏しいため，野外の放養が普通。幼虫はクヌギ，コナラなどの葉を食べ，蛹(さなぎ)で越冬，成虫は年２回発生する。柞蚕糸は丈夫で，光沢が強いが，染色が困難。

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