Act Tower(アクトシティ浜松?) is a skyscraper in Hamamatsu, Shizuoka Prefecture, Japan. It is 213 metres (699 ft) tall, and has 45 floors, making it the tallest building in Hamamatsu. It was constructed in 1994, and houses the Okura City Hotel in its top 17 floors, as well as observation deck on its top floor. The building was designed to resemble a harmonica, acknowledging the musical instrument manufacturers headquartered in Hamamatsu that include Yamaha, Roland, Kawai and Tokai.