Japan, the (southern) Russian Far East and from China south to North and South Korea.
In between 5 and 6 centimeter
depends on the local conditions, one or two broods annually. In captivity usually 2. The pupae overwinter.
Galium (including G. aparine) preferred. Also Epilobium and Vitis.
Easy and suitable for newcomers. Keep warm and clean, in well ventilated plastic containers. Fast growing and ready to pupate within 4 weeks. The pupal stage in between the 2 summer flights is short (2 to 3 weeks). Pupae after the last flight in autumn can be overwintered in the fridge.