A new species of the genus Lignyodes Dejean, which is a new representative of the genus and the tribe Lignyodini Bedel, was discovered in Japan on the eastern periphery of the Palaearctic region. It is described herein as L. japonicus new species. The discovery of this species shows the discontinuous distribution of this genus in East Asia–North America, and Europe, with the Bering Arc relationship in the temperate region of the northern hemisphere. This species is very rare in collections and no biological information is available. The probable host and distribution in Japan are predicted from previous records of related species.