Question: What is the smallest of the four main islands of Japan where the Acronicta digna moth can be found?
Sentence (from "Acronicta digna"): It is found in the Korean Peninsula, China, Japan (Honshu, Shikoku, Kyushu), the Russian Far East (Primorye, southern Khabarovsk, Amur region) and Taiwan.
Relevant evidence: Yes