The twins who were born in Japan have been named, Meihin (female) and Eihin (male).

Meihin, the female cub, was born in early morning of Sept. 13 and Eihin, the male cub, about 70 minutes later. They weighed about 194 grams and about 116 grams at the time of their births.

They now both weigh over 2kg.