Ulsan Castle (울산왜성, 蔚山倭城) is a Japanese style castle in Ulsan, South Korea which was constructed during the Japanese invasions of Korea (Imjin war) by Katō Kiyomasa's army.

Today, Ulsan Castle is almost ruined by the city planning of Ulsan.

Ulsan Japanese Castle was excluded from Historic Sites of South Korea on October 30, 1997.

This castle-related article is a stub.

You can help Wikipedia by expanding it.This article about a South Korean building or structure is a stub.