Which hotels in Osaka, Japan have mute piano equipment?

Marriott Hotel Osaka, Ritz-Carlton Osaka. Official website of Osaka Tourism Bureau shows that hotels such as Marriott Hotel and Ritz-Carlton Hotel in Osaka are equipped with mute piano equipment, which is very popular and comfortable to use. Osaka, the second largest city in Japan, is also the central city of Osaka metropolitan area, one of the three metropolitan areas in Japan.