City Hall Plaza Ao-re Nagaoka, Music venue in Nagaoka, Japan

City Hall Plaza Ao-re Nagaoka is a performing arts center and music venue in Nagaoka, Japan. The building uses timber extensively throughout its interior and brings together concert halls, exhibition rooms, and municipal offices within a single structure.

The complex opened in April 2012 to provide Nagaoka with a central space for performing arts and civic gatherings. It formed part of a rebuilding initiative following the 2004 earthquake that affected the region.

The nickname "Aore" comes from the Nagaoka dialect word "aoure", meaning "let's meet". The arena's first concert was by Ikimonogakari on 14 April 2012. The glass-walled council chamber has parent-child seats, a first in Niigata Prefecture.

The complex faces Ote-dori, with the outdoor Maeniwa plaza serving as the entrance from the city centre; the covered Nakadoma lies beyond it. City Hall counters on the east building's first floor stay open until 8 PM on weekdays and also operate on Saturdays, Sundays and holidays except over New Year. The arena opens its 18-metre-wide mouth onto Nakadoma for combined use.

The covered plaza Nakadoma is not a courtyard but a 2,250 m² roofed public space with earthen-floor paving, designed by Kengo Kuma so people without city hall business would drop by. Its 300-inch LED screen usually shows Nagaoka publicity and sightseeing footage, and the roof's snow-melting system lets natural light in even in winter.