Bombyx mori silk only once annually. The second type is called bivoltine and is normally found in China, Japan, and Korea. The breeding process of this type takes place twice annually, a feat made possible through the slightly warmer climates and the resulting two life cycles. The polyvoltine type of mulberry silkworm can only be found in the tropics. The eggs are laid by female moths and hatch within nine to 12 days, so the resulting type can have up to eight separate life cycles throughout the year. Eggs take about 14 days to hatch into larvae, which eat continuously. They have
Maru Maru Mori Mori! the record of the longest streak on the Oricon charts. The previous record set by the 2007 song "Gake no Ue no Ponyo", the theme song of the Studio Ghibli film "Ponyo", which remained on the charts for 11 consecutive weeks in 2008. "Gake no Ue no Ponyo" featured the then 8-year old actress Nozomi Ōhashi. The song "Maru Maru Mori Mori" received the Special Award at the 53rd Japan Record Awards. Maru Maru Mori Mori! On 4 April 2011, it was announced that the theme song of the Fuji Television television drama "Marumo no Okite" will be sung by