The end of silent film in the West and in Japan was imposed by the industry and the market, not by any inner need or natural evolution... Silent cinema was a highly pleasurable and fully mature form. It didn't lack anything, least in Japan, where there was always the human voice doing the dialogues and the commentary. Sound films were not better, just more economical. As a cinema owner you didn't have to pay the wages of musicians and benshi any more. And a good benshi was a star demanding star payment.