Cottage C Building at Setsurokuro Castle Campground is a residential facility completed in 2000, located in Kawanishi Town, Niigata Prefecture. Designed by architect Daigo Ishii and Future Scape Architects, this structure exemplifies early 2000s Japanese accommodation design. The building demonstrates thoughtful integration with its campground environment while providing comfortable lodging amenities. Its architectural approach reflects contemporary design principles focused on creating harmonious relationships between built structures and natural settings, making it a noteworthy example of rural hospitality architecture from this period.