Bombyx mori their lifecycle, and enclose themselves in a cocoon made up of raw silk produced by the salivary glands. The final molt from larva to pupa takes place within the cocoon, which provides a vital layer of protection during the vulnerable, almost motionless pupal state. Many other Lepidoptera produce cocoons, but only a few—the Bombycidae, in particular the genus "Bombyx", and the Saturniidae, in particular the genus "Antheraea"—have been exploited for fabric production. If the animal is allowed to survive after spinning its cocoon and through the pupal phase of its lifecycle, it releases proteolytic enzymes to make a hole in
Mori Shogunzuka Kofun Mori Shogunzuka Kofun The is a keyhole-shaped tumulus within the located in Chikuma, Nagano Prefecture Japan. The "kofun" has been restored to what modern archaeologists believe to represent its original form, with reproduction haniwa on top of the mound. Its burial chamber is closed and inaccessible to the public. There is also a museum on site, the Mori Shogunzuka Museum, which displays a reproduction of the burial chamber as well as artifacts unearthed during archaeological investigations. The cluster of four tombs has been designated a National Historic Site by the Japanese government. The Mori Shogunzuka Kofun measures approximately 100 meters