Nikiclub Nanaishi Butai Kagami is a distinctive performance venue located in Nasu, Tochigi Prefecture. Designed by renowned architect Hiroshi Naito and curator Masao Matsuoka, this theater represents a contemporary approach to cultural architecture. Functioning as a park facility, the structure integrates seamlessly with its natural surroundings while providing an intimate space for theatrical and musical performances. The building exemplifies modern Japanese architectural philosophy, combining functionality with aesthetic sensitivity to create a unique venue for the arts.