Caligula jonasi, the jonasi silkmoth, is a moth of the family Saturniidae. It was described by Arthur Gardiner Butler in 1877. It is found in Japan, China and the Korean Peninsula.
The wingspan is . Adults are on wing from October to April.
The larvae feed on chestnut, willow, apple, hawthorn, oak and poplar. Larvae have urticating hairs which can cause a rash to the skin.