He scored two smash hit singles "Coffee Rumba" and "Hana no Kubikazari". Both songs were the 1960s kayokyoku (The former was remake of Venezuelan song "Moliendo Café" originally composed in 1958). Likewise, a follow-up studio album "United Cover" is mainly composed of cover versions of the songs that were popular in Japan during the postwar Showa period. "United Cover" debuted at #2 on the Japanese Oricon chart and sold more than 500,000 copies up to 2002, and has been certified triple platinum by RIAJ for shipments of over 800,000 copies to date. It has been one of the most commercially successful cover albums by Japanese artists in the 2000s, along with "Fukuyama Engineering" by Masaharu Fukuyama and "Vocalist" series by Hideaki Tokunaga.