Located near Osaka Castle, the Otsuki Noh Theater has been around since before the war. It opened in 1935 as a unique Noh theater, replacing the box seating that was common at the time with chairs. It was one of the few Noh theaters in the Kansai region to escape the ravages of war, and has continued to host Noh performances even after the war. Its unique features include a life-size replica of Osaka Castle's largest stone wall serving as the backdrop for the bridge, and a reverberation time of approximately one second, taking into consideration the musical characteristics of Noh. The theater seats 502. In 2007, as part of its "70th Anniversary Commemoration" project, the theater implemented various initiatives throughout the year, including parent-child appreciation classes, public participation performances, and delayed start times for regular performances. It also set up an explanation corner and a demonstration experience workshop. Noh, a traditional Japanese performing art that was perfected during the Muromachi period and is said to be the world's oldest surviving performing art, has been declared a UNESCO Intangible Cultural Heritage, and at Otsuki Noh Theatre, in addition to classical works, new Noh plays are also performed, spreading the appeal of Noh to future generations.