In the late 1980's the emergence of one of Japan's most famous rock groups of all time, Chage & Aska. A massively popular male singer/songwriter duo consisting of Chage (Shuji Shibata) and Ryo Aska (Shigeaki Miyazaki), they released a string of consecutive monster hits throughout the 1980s and 1990s, establishing themselves as Asia's most popular rock group. Their "Asian Tour II / Mission Impossible" tour was the single largest concert tour ever put on by a Japanese group - the tickets for all 61 concerts in Japan, Hong Kong, Singapore and Taiwan sold out on the first day. Ryo Aska is widely considered today to be one of Japan's greatest songwriters. However, with the advent of the Japanese dance-pop music pioneered by Namie Amuro and Tetsuya Komuro in the mid- to late-1990s, the popularity of rock groups like Chage & Aska has declined.