Nymphalis c-aureum Polygonia c-aureum, the Asian comma, is a middle-size butterfly found in Japan (from Hokkaidō to Tanegashima), Korean Peninsula, China, Taiwan, and Indochina.

The undersides of the wings is mottled brown (tree bark like) with a shiny comma mark on the center of the hindwing.

The main difference with other comma species is that it has blueish markings on the bottom of its hindwing.

P. c-aureum is common in suburban areas.

The larvae of the species feed on plants such as: Humulus japonicus, the Japanese hop.